0001193125-21-281657 | 20-F/A | XBRL Viewer

Ending balance at Mar. 31, 2021

107

Others

(121)

₨ 64,745

₨ 3,799

₨ 0

₨ 67,165

₨ (5,224)

^[1]

₨ 1,165

₨ (6,489)

₨ 49

₨ 1,602

₨ 10

₨ 62,077

₨ 2,668

[1]	includes cash flow hedge reserve and cost of hedge reserve (refer note 52)

Consolidated Statement Of Cash Flows ₨ in Millions	12 Months Ended
Consolidated Statement Of Cash Flows ₨ in Millions	Mar. 31, 2021 INR (₨)	Mar. 31, 2020 INR (₨)	Mar. 31, 2019 INR (₨)
Cash flows from operating activities
(Loss) / profit before tax	₨ (5,128)	₨ (623)	₨ 4,935
Adjustments to reconcile profit before tax to net cash flows:
Depreciation and amortisation expense	12,026	11,240	9,496
Loss on disposal of property plant and equipment and capital work in progress	205	104	197
Capital work in progress written off	39
Share in loss of jointly controlled entities	45	53	40
Deferred revenue	(114)	(35)	(7)
Government grant—viability gap funding	(32)	(37)	(39)
Gain on settlement of derivative instruments designated as cash flow hedge (net)	(16)
Loss on settlement of derivative instruments designated as cash flow hedge (net)	76	302	304
Gratuity expense	15	13	13
Provision for operation and maintenance equalisation	(147)	11	923
Share based payments	203	72	183
Amortisation of option premium	1,773	1,119	69
Impairment allowances for financial assets	416	82	61
Unamortised ancillary borrowing cost written off	347	520	523
Gain on sale of intangible assets	0	(219)
Interest income	(1,774)	(2,144)	(1,465)
Interest expenses	34,913	32,611	25,939
Fair value gain on mutual fund			(272)
Impairment loss on assets of disposal group held for sale	408
Gain on settlement of financial liabilities	(1,465)
Unwinding of discount on provisions	745	524	329
Others	(137)
Working capital adjustments:
(Increase) / decrease in trade receivables	(9,813)	(6,820)	(5,798)
(Increase) / decrease in non-current trade receivables	(1,178)
(Increase) / decrease in inventories	(221)	110	(565)
(Increase) / decrease in other current financial assets	476	(407)	(2,953)
(Increase) / decrease in other non-current financial assets	7	(49)	4
(Increase) / decrease in other current assets	(674)	253	(52)
(Increase) / decrease in other non-current assets	7	206	(29)
(Increase) / decrease in prepayments	(213)	(995)	(288)
Increase / (decrease) in other current financial liabilities	(258)	31	(187)
Increase / (decrease) in other current liabilities	168	274	295
Increase / (decrease) in other non-current liabilities	(9)	35	16
Increase / (decrease) in contract liabilities	1,538
Increase / (decrease) in trade payables	(555)	697	221
Increase / (decrease) in employee benefit liabilities	158	10	12
Increase / (decrease) in provisions	(4)	4
Cash generated from operations	31,827	36,942	31,905
Income tax (paid)/refund	254	(1,854)	(1,905)
Net cash generated from operating activities (a)	32,081	35,088	30,000
Cash flows from investing activities
Purchase of property, plant and equipment, intangible assets and right of use assets	(24,482)	(39,299)	(61,199)
Sale of intangible assets		219
Investments in deposits having residual maturity more than 3 months (net)	1,448	(15,868)	(2,622)
Investment in mutual funds redeemed			9,540
Disposal of subsidiary, net of cash disposed	3,597
Acquisition of subsidiary, net of cash acquired	(34)	(762)	(941)
Cash acquired on acquisition of control in jointly controlled entities	46
Government grant received	26	54	496
Proceeds from interest received	1,987	1,932	1,318
Net cash used in investing activities (b)	(17,412)	(53,724)	(53,408)
Cash flows from financing activities
Proceeds from issue of equity shares (including premium and net of share issue expenses)			560
Payment for acquisition of subsidiary's interest from non-controlling interest	(1,516)	(736)
Proceeds from disposal of subsidiary's interest to non-controlling interest	8	846
Payment of lease liabilities (including payment of interest expense)	(248)	(347)	(1,666)
Proceeds from compulsory convertible preference shares		20,903
Payment made for repurchase of vested stock options	(681)
Proceeds from long term interest-bearing loans and borrowings	125,204	98,660	109,087
Repayment of long term interest-bearing loans and borrowings	(95,700)	(55,429)	(62,134)
Loan from related parties	605
Proceeds from short term interest-bearing loans and borrowings	18,779	34,808	33,010
Repayment of short term interest-bearing loans and borrowings	(20,002)	(44,790)	(32,685)
Interest paid	(33,528)	(32,305)	(26,563)
Net cash generated from financing activities (c)	(7,079)	21,610	19,609
Net increase / (decrease) in cash and cash equivalents (a) + (b) + (c)	7,590	2,974	(3,799)
Cash and cash equivalents at the beginning of the year	13,089	10,115	13,914
Cash and cash equivalents at the end of the year	20,679	13,089	10,115
Components of cash and cash equivalents
Cash and cheque on hand	0	0	0
Balances with banks:
- On current accounts	19,474	11,699	4,781
- Deposits with original maturity of less than 3 months	1,205	1,390	5,334
Total cash and cash equivalents	₨ 20,679	₨ 13,089	₨ 10,115

Changes In Liabilities Arising From Financing Activities - INR (₨)
₨ in Millions

12 Months Ended

Mar. 31, 2021

Mar. 31, 2020

Disclosure of reconciliation of liabilities arising from financing activities [line items]

Opening balance

₨ 355,684

₨ 289,943

Cash flows (net)

28,282

54,152

Other changes

^[1]

(7,733)

11,589

Closing balance

376,233

355,684

Long term interest-bearing loans and borrowings (including current maturities and net of ancillary borrowings cost incurred)

Disclosure of reconciliation of liabilities arising from financing activities [line items]

Opening balance

343,536

269,327

Cash flows (net)

29,504

64,134

Other changes

^[1]

(7,450)

10,075

Closing balance

365,590

343,536

Short term interest-bearing loans and borrowings

Disclosure of reconciliation of liabilities arising from financing activities [line items]

Opening balance

12,148

20,616

Cash flows (net)

(1,222)

(9,982)

Other changes

^[1]

(283)

1,514

Closing balance

₨ 10,643

₨ 12,148

[1]	Includes adjustment for ancillary borrowing cost, unrealised / realised foreign exchange gain / loss.

Corporate information

12 Months Ended

Mar. 31, 2021

Corporate information

1	Corporate information

ReNew Power Private Limited (the Company or Parent) is a private limited company domiciled and incorporated in India. The registered office of the Company is located at 138, Ansal Chamber—II Bhikaji Cama Place, New Delhi—110066. The consolidated financial statements comprise financial statements of Renew Power Private Limited and its subsidiaries (collectively, the Group) were authorised for issue by the Company’s Board of Directors on 21 June 2021.

The Group is carrying out business activities relating to generation of power through

non-conventional

and renewable energy sources. Information on the Group’s structure is provided in note 43 and information on other related party relationships of the Group is provided in note 44.

Basis of preparation

12 Months Ended

Mar. 31, 2021

Basis of preparation

2	Basis of preparation

The consolidated financial statements of the Group have been prepared in accordance with International Financial Reporting Standards (IFRS) as issued by the International Accounting Standards Board (IASB). The Group has prepared the financial statements on the basis that it will continue to operate as a going concern. The Directors consider that there are no material uncertainties that may cast doubt significant doubt over this assumption. There is a reasonable expectation that the Group has adequate resources to continue in operational existence for the foreseeable future, and not less than 12 months from the end of the reporting period.

These consolidated financial statements have been prepared in accordance with the accounting policies, set out below and were consistently applied to all periods presented unless otherwise stated. Refer note 4.2.1 for new and amended standards and interpretations adopted by the Group.

The consolidated financial statements have been prepared on a historical cost basis, except for the following assets and liabilities which have been measured at fair value:

•

Financial assets and liabilities measured at fair value (refer accounting policy regarding financial instruments)

•

Share based payments

•

Assets held for sale

The consolidated financial statements are presented in Indian Rupees (INR) and all values are rounded to the nearest million, except when otherwise indicated. Absolute amounts less than INR 500,000 are appearing in financial statements as “0” due to presentation in millions.

Basis of consolidation

12 Months Ended

Mar. 31, 2021

Basis of consolidation

3	Basis of consolidation

The consolidated financial statements comprise the financial statements of the Company and its subsidiaries as at 31 March 2021. Control is achieved when the Group is exposed, or has rights, to variable returns from its involvement with the investee and has the ability to affect those returns through its power over the investee. Specifically, the Group controls an investee if and only if the Group has:

•

Power over the investee (i.e. existing rights that give it the current ability to direct the relevant activities of the investee)

•

Exposure, or rights, to variable returns from its involvement with the investee; and

•

The ability to use its power over the investee to affect its returns

Generally, there is a presumption that a majority of voting rights result in control. To support this presumption and when the Group has less than a majority of the voting or similar rights of an investee, the Group considers all relevant facts and circumstances in assessing whether it has power over an investee, including:

•

The contractual arrangement(s) with the other vote holders of the investee

•

Rights arising from other contractual arrangements

•

The Group’s voting rights and potential voting rights

The Group

re-assesses

whether or not it controls an investee if facts and circumstances indicate that there are changes to one or more of the three elements of control. Consolidation of a subsidiary begins when the Group obtains control over the subsidiary and ceases when the Group loses control of the subsidiary. Assets, liabilities, income and expenses of a subsidiary acquired or disposed of during the year are included in the Consolidated Financial Statements from the date the Group gains control until the date the Group ceases to control the subsidiary.

Profit or loss and each component of OCI are attributed to the equity holders of the parent of the Group and to the

non-controlling

interests, even if this results in the

non-controlling

interests having a deficit balance.

The consolidated financial statements are prepared using uniform accounting policies for like transactions and other events in similar circumstances. If a member of the Group uses accounting policies other than those adopted in the Consolidated Financial Statements for like transactions and events in similar circumstances, appropriate adjustments are made to that Group member’s financial statements in preparing the consolidated financial statements to ensure conformity with the Group’s accounting policies.

The financial statements of all entities used for the purpose of consolidation are drawn up to same reporting date as that of the Company i.e., year ended on 31 March. When the end of the reporting period of the parent is different from that of a subsidiary, the subsidiary prepares, for consolidation purposes, additional financial information as of the same date as the financial statements of the parent to enable the parent to consolidate the financial information of the subsidiary, unless it is impracticable to do so.

Consolidation procedure

•

Combine like items of assets, liabilities, equity, income, expenses and cash flows of the parent on line by line basis with those of its subsidiaries. For this purpose, income and expenses of the subsidiary are based on the amounts of the assets and liabilities recognised in the Consolidated Financial Statements at the acquisition date.

•

Offset (eliminate) the carrying amount of the parent’s investment in each subsidiary and the parent’s portion of equity of each subsidiary. Business combinations policy explains how to account for any related goodwill.

•

Eliminate in full intra-group assets and liabilities, equity, income, expenses and cash flows relating to transactions between entities of the Group (profits or losses resulting from intragroup transactions that are recognised in assets, such as inventory and property, plant and equipment, are eliminated in full). Intragroup losses may indicate an impairment that requires recognition in the Consolidated Financial Statements. IAS 12—‘Income Taxes’ applies to temporary differences that arise from the elimination of profits and losses resulting from intragroup transactions.

Profit or loss and each component of other comprehensive income (OCI) are attributed to the equity holders of the parent of the Group and to the

non-controlling

interests, even if this results in the

non-controlling

interests having a deficit balance. When necessary, adjustments are made to the financial statements of subsidiaries to bring their accounting policies into line with the Group’s accounting policies. All intra-group assets and liabilities, equity, income, expenses and cash flows relating to transactions between members of the Group are eliminated in full on consolidation.

Changes in the Company’s interests in subsidiaries that do not result in a loss of control are accounted for as equity transactions. The carrying amount of the Group’s interests and the

non-controlling

interests are adjusted to reflect the changes in their relative interests in the subsidiaries. Any difference between the amount by which the

non-controlling

interests are adjusted and the fair value of the consideration paid or received is recognised directly in equity and attributed to the owners of the Company.

If the Group loses control over a subsidiary, it:

•

Derecognises the assets (including goodwill) and liabilities of the subsidiary at their carrying amounts at the date when control is lost

•

Derecognises the carrying amount of any

non-controlling

interests

•

Derecognises the cumulative translation differences recorded in equity

•

Recognises the fair value of the consideration received and deferred consideration receivable

•

Recognises the fair value of any investment retained

•

Recognises any surplus or deficit in profit or loss

•

Recognise that distribution of shares of subsidiary to group in Group’s capacity as owners

•

Reclassifies the parent’s share of components previously recognised in OCI to profit or loss or retained earnings, as appropriate, as would be required if the group had directly disposed of the related assets or liabilities.

Summary of significant accounting policies

12 Months Ended

Mar. 31, 2021

Summary of significant accounting policies

4.1	Summary of significant accounting policies

The following are the significant accounting policies applied by the Group in preparing its consolidated financial statements:

a)	Business combinations and goodwill

Business combinations are accounted for using the acquisition method. The cost of an acquisition is measured as the aggregate of the consideration transferred measured at acquisition date fair value and the amount of any

non-controlling

interests in the acquiree. For each business combination, the Group elects whether to measure the

non-controlling

interests in the acquiree at fair value or at the proportionate share of the acquiree’s identifiable net assets. Acquisition-related costs are expensed as incurred and included in other expenses.

The Group determines that it has acquired a business when the acquired set of activities and assets include an input and a substantive process that together significantly contribute to the ability to create outputs. The acquired process is considered substantive if it is critical to the ability to continue producing outputs, and the inputs acquired include an organised workforce with the necessary skills, knowledge, or experience to perform that process or it significantly contributes to the ability to continue producing outputs and is considered unique or scarce or cannot be replaced without significant cost, effort, or delay in the ability to continue producing outputs.

At the acquisition date, the identifiable assets acquired and the liabilities assumed are recognised at their acquisition date fair values. For this purpose, the liabilities assumed include contingent liabilities representing present obligation and they are measured at their acquisition fair values irrespective of the fact that outflow of resources embodying economic benefits is not probable. However, the following assets and liabilities acquired in a business combination are measured at the basis indicated below:

•

Deferred tax assets or liabilities and the assets or liabilities related to employee benefit arrangements are recognised and measured in accordance with IAS 12—Income Taxes and IAS 19—Employee Benefits respectively.

•

Liabilities or equity instruments related to share based payment arrangements of the acquiree or share —based payments arrangements of the Group entered into to replace share-based payment arrangements of the acquiree are measured in accordance with IFRS 2 Share-based Payment at the acquisition date.

•

Assets (or disposal groups) that are classified as held for sale in accordance with IFRS 5—Non-current Assets Held for Sale and Discontinued Operations are measured in accordance with that standard.

•

Reacquired rights are measured at a value determined on the basis of the remaining contractual term of the related contract. Such valuation does not consider potential renewal of the reacquired right.

•

Potential tax effects of temporary differences and carry forwards of an acquiree that exist at the acquisition date or arise as a result of the acquisition are accounted in accordance with IAS 12.

When the Group acquires a business, it assesses the financial assets and liabilities assumed for appropriate classification and designation in accordance with the contractual terms, economic circumstances and pertinent conditions as at the acquisition date. This includes the separation of embedded derivatives in host contracts by the acquiree.

If the business combination is achieved in stages, any previously held equity interest is

re-measured

at its acquisition date fair value and any resulting gain or loss is recognised in the statement of profit or loss or OCI, as appropriate.

Any contingent consideration to be transferred by the acquirer is recognised at fair value at the acquisition date. Contingent consideration classified as an asset or liability that is a financial instrument and within the scope of IFRS 9 Financial Instruments, is measured at fair value with changes in fair value recognised in the statement of profit or loss in accordance with IFRS 9. Other contingent consideration that is not within the scope of IFRS 9 is measured at fair value at each reporting date with changes in fair value recognised in profit or loss. Contingent consideration classified as equity is not remeasured and its subsequent settlement is accounted for within equity.

Goodwill is initially measured at cost, being the excess of the aggregate of the consideration transferred and the amount recognised for

non-controlling

interests, and any previous interest held, over the net identifiable assets acquired and liabilities assumed. If the fair value of the net assets acquired is in excess of the aggregate consideration transferred, the Group

re-assesses

whether it has correctly identified all of the assets acquired and all of the liabilities assumed and reviews the procedures used to measure the amounts to be recognised at the acquisition date. If the reassessment still results in an excess of the fair value of net assets acquired over the aggregate consideration transferred, then the gain is recognised in statement of profit or loss.

After initial recognition, goodwill is measured at cost less any accumulated impairment losses. For the purpose of impairment testing, goodwill acquired in a business combination is, from the acquisition date, allocated to each of the Group’s cash-generating units that are expected to benefit from the combination, irrespective of whether other assets or liabilities of the acquiree are assigned to those units.

A cash generating unit to which goodwill has been allocated is tested for impairment annually on 31 March, or more frequently when there is an indication that the unit may be impaired. If the recoverable amount of the cash generating unit is less than its carrying amount, the impairment loss is allocated first to reduce the carrying amount of any goodwill allocated to the unit and then to the other assets of the unit pro rata based on the carrying amount of each asset in the unit. Any impairment loss for goodwill is recognised in the statement of profit or loss. An impairment loss recognised for goodwill is not reversed in subsequent periods.

Where goodwill has been allocated to a cash-generating unit and part of the operation within that unit is disposed of, the goodwill associated with the disposed operation is included in the carrying amount of the operation when determining the gain or loss on disposal. Goodwill disposed in these circumstances is measured based on the relative values of the disposed operation and the portion of the cash-generating unit retained.

b)	Investment in associates and jointly controlled entities (joint ventures)

An associate is an entity over which the Group has significant influence. Significant influence is the power to participate in the financial and operating policy decisions of the investee, but is not control or joint control over those policies.

A joint venture is a type of joint arrangement whereby the parties that have joint control of the arrangement have rights to the net assets of the joint venture. Joint control is the contractually agreed sharing of control of an arrangement, which exists only when decisions about the relevant activities require the unanimous consent of the parties sharing control.

The considerations made in determining significant influence or joint control are similar to those necessary to determine control over subsidiaries. The Group’s investment in its associate and joint venture are accounted for using the equity method.

Under the equity method, the investment in an associate or a joint venture is initially recognised at cost. The carrying amount of the investment is adjusted to recognise changes in the Group’s share of net assets of the associate or joint venture since the acquisition date. Goodwill relating to the associate or joint venture is included in the carrying amount of the investment and is not tested for impairment separately.

The statement of profit or loss reflects the Group’s share of the results of operations of the associate or joint venture. Any change in OCI of those investees is presented as part of the Group’s OCI. In addition, when there has been a change recognised directly in the equity of the associate or joint venture, the Group recognises its share of any changes, when applicable, in the statement of changes in equity. Unrealised gains and losses resulting from transactions between the Group and the associate or joint venture are eliminated to the extent of the interest in the associate or joint venture.

The aggregate of the Group’s share of profit or loss of an associate and a joint venture is shown on the face of the statement of profit or loss outside operating profit and represents profit or loss after tax and

non-controlling

interests in the subsidiaries of the associate or joint venture.

The financial statements of the associate or joint venture are prepared for the same reporting period as the Group. When necessary, adjustments are made to bring the accounting policies in line with those of the Group.

After application of the equity method, the Group determines whether it is necessary to recognise an impairment loss on its investment in its associate or joint venture. At each reporting date, the Group determines whether there is objective evidence that the investment in the associate or joint venture is impaired. If there is such evidence, the Group calculates the amount of impairment as the difference between the recoverable amount of the associate or joint venture and its carrying value, and then recognises the loss within ‘Share of profit of an associate and a joint venture’ in the statement of profit or loss.

Upon loss of significant influence over the associate or joint control over the joint venture, the Group measures and recognises any retained investment at its fair value. Any difference between the carrying amount of the associate or joint venture upon loss of significant influence or joint control and the fair value of the retained investment and proceeds from disposal is recognised in profit or loss.

Interests in joint operations

A joint operation is a joint arrangement whereby the parties that have joint control of the arrangement have rights to the assets, and obligations for the liabilities, relating to the arrangement. Joint control is the contractually agreed sharing of control of an arrangement, which exists only when decisions about the relevant activities require unanimous consent of the parties sharing control.

When a Group entity undertakes its activities under joint operations, the Group as a joint operator recognises in relation to its interest in a joint operation:

•

its assets, including its share of any assets held jointly;

•

its liabilities, including its share of any liabilities incurred jointly;

•

its revenue from the sale of its share of the output arising from the joint operation;

•

its share of the revenue from the sale of the output by the joint operation; and

•

its expenses, including its share of any expenses incurred jointly.

The Group accounts for the assets, liabilities, revenue and expenses relating to its interest in a joint operation in accordance with the IFRS Standards applicable to the particular assets, liabilities, revenue and expenses.

When a Group entity transacts with a joint operation in which a Group entity is a joint operator (such as a sale or contribution of assets), the Group is considered to be conducting the transaction with the other parties to the joint operation, and gains and losses resulting from the transactions are recognised in the Group’s consolidated financial statements only to the extent of other parties’ interests in the joint operation.

When a Group entity transacts with a joint operation in which a Group entity is a joint operator (such as a purchase of assets), the Group does not recognise its share of the gains and losses until it resells those assets to a third party.

c)	Current versus non-current classification

The Group presents assets and liabilities in the statement of financial position based on current /

non-current

classification.

An asset is treated as current when it is:

•

Expected to be realised or intended to sold or consumed in normal operating cycle

•

Held primarily for the purpose of trading

•

Expected to be realised within twelve months after the reporting period, or

•

Cash or cash equivalents unless restricted from being exchanged or used to settle a liability for at least twelve months after the reporting period

All other assets are classified as

non-current.

A liability is treated as current when it is:

•

Expected to be settled in normal operating cycle

•

Held primarily for the purpose of trading

•

Due to be settled within twelve months after the reporting period, or

•

There is no unconditional right to defer the settlement of the liability for at least twelve months after the reporting period

All other liabilities are classified as

non-current.

Deferred tax assets / liabilities are classified as

non-current

assets / liabilities.

The terms of the liability that could, at the option of the counterparty, result in its settlement by the issue of equity instruments do not affect its classification.

The operating cycle is the time between the acquisition of assets for processing and their realisation / settlement in cash and cash equivalents. The Group has identified twelve months as their operating cycle for classification of their current assets and liabilities.

d)	Fair value measurement

The Group measures financial instruments, such as, derivatives at fair value at each reporting date.

Fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. The fair value measurement is based on the presumption that the transaction to sell the asset or transfer the liability takes place either:

•

In the principal market for the asset or liability, or

•

In the absence of a principal market, in the most advantageous market for the asset or liability

The principal or the most advantageous market must be accessible by the Group.

The fair value of an asset or a liability is measured using the assumptions that market participants would use when pricing the asset or liability, assuming that market participants act in their economic best interest. The fair value measurement of a

non-financial

asset takes into account a market participant’s ability to generate economic benefits by using the asset in its highest and best use or by selling it to another market participant that would use the asset in its highest and best use. The Group uses valuation techniques that are appropriate in the circumstances and for which sufficient data are available to measure fair value, maximising the use of relevant observable inputs and minimising the use of unobservable inputs.

All assets and liabilities for which fair value is measured or disclosed in the consolidated financial statements are categorised within the fair value hierarchy, described as follows, based on the lowest level input that is significant to the fair value measurement as a whole:

•

Level 1—Quoted (unadjusted) market prices in active markets for identical assets or liabilities

•

Level 2—Valuation techniques for which the lowest level input that is significant to the fair value measurement is directly or indirectly observable

•

Level 3—Valuation techniques for which the lowest level input that is significant to the fair value measurement is unobservable

For assets and liabilities that are recognised in the financial statements at fair value on a recurring basis, the Group determines whether transfers have occurred between levels in the hierarchy by

re-assessing

categorisation (based on the lowest level input that is significant to the fair value measurement as a whole) at the end of each reporting period.

The management of the Group determines the policies and procedures for both recurring fair value measurement, such as unquoted financial assets, and for

non-recurring

measurement, such as assets held for sale.

External valuers are involved for valuation of significant assets, and significant liabilities. Involvement of external valuers is determined annually by the management after discussion with and approval by the Company’s Audit Committee. Selection criteria include market knowledge, reputation, independence and whether professional standards are maintained. The management decides, after discussions with the Group’s external valuers, which valuation techniques and inputs to use for each case.

At each reporting date, the management of the Group analyses the movements in the values of assets and liabilities which are required to be remeasured or

re-assessed

as per the accounting policies of the Group. The management also compares the change in the fair value of each asset and liability with relevant external sources to determine whether the change is reasonable.

On an interim basis, the management presents the valuation results to the Audit Committee and the Group’s independent auditors. This includes a discussion of the major assumptions used in the valuations. For the purpose of fair value disclosures, the Group has determined classes of assets and liabilities on the basis of the nature, characteristics and risks of the asset or liability and the level of the fair value hierarchy, as explained above.

This note summarises the accounting policy for determination of fair value. Other fair value related disclosures are given in the relevant notes as following:

•

Disclosures for significant estimates and assumptions (refer note 55)

•

Quantitative disclosures of fair value measurement hierarchy (refer note 47)

•

Financial instruments (including those carried at amortised cost) (refer note 46 and 47)

e)	Revenue recognition

(i) Revenue from contracts with customers

Revenue from contracts with customers is recognised when control of the goods or services are transferred to the customer at an amount that reflects the consideration to which the Group expects to be entitled in exchange for those goods or services. The Group has generally concluded that it is the principal in its revenue arrangements, because it typically controls the goods or services before transferring them to the customer.

a) Sale of power

Income from supply of power is recognised over time on the supply of units generated from plant to the grid as per terms of the Power Purchase Agreement (PPA) entered into with the customers.

The Group considers whether there are other promises in the contract that are separate performance obligations to which a portion of the transaction price needs to be allocated. In determining the transaction price for the sale of power, the Group considers the effects of variable consideration and existence of a significant financing component. There is only one performance obligation in the arrangement and therefore, allocation of transaction price is not required.

b) Income from services (management consultancy)

The Group recognises revenue from projects management / technical consultancy over time because the customer simultaneously receives and consumes the benefits provided to them, as per the terms of the agreement entered with the customer.

c) Sale of equipment

Revenue from sale of equipment is recognised at the point in time when control of the asset is transferred to the customer, generally on delivery of the equipment. The Group considers whether there are other promises in the contract that are separate performance obligations to which a portion of the transaction price needs to be allocated. In determining the transaction price for the sale of equipment, the Group considers the effects of variable consideration, the existence of significant financing components,

non-cash

consideration, and consideration payable to the customer. There is only one performance obligation in the arrangement and therefore, allocation of transaction price is not required.

d) Income from operation and maintenance services

Revenue from operation and maintenance services are recognised over time as per the terms of agreement.

e) Revenue from Engineering Procurement and Construction (EPC) Contracts

Revenue from provision of service is recognised over a period of time on the percentage of completion method. Percentage of completion is determined as a proportion of cost incurred to date to the total estimated contract cost. Profit on contracts is recognised on percentage of completion method and losses are accounted as soon as these are anticipated. In case the total cost of a contract based on technical and other estimates is expected to exceed the corresponding contract value such expected loss is provided for. The revenue on account of extra claims on construction contracts are accounted for at the time of acceptance in principle by the customers due to uncertainties attached.

Contract revenue earned in excess of billing has been reflected under other current assets and billing in excess of contract revenue has been reflected under current liabilities in the statement of financial position.

f) Sale of Reduction Emission Certificates (RECs)

Income from sale of RECs is recognised on sale of these certificates.

Variable consideration

If the consideration in a contract includes a variable amount, the Group estimates the amount of consideration to which it will be entitled in exchange for transferring the goods or service to the customer. The variable consideration is estimated at contract inception and constrained until it is highly probable that a significant revenue reversal in the amount of cumulative revenue recognised will not occur when the associated uncertainty with the variable consideration is subsequently resolved. To estimate the variable consideration, the Group applies the method that it expects best predicts the amount of consideration to which the entity will be entitled based on the terms of the contract.

• Rebates

In some PPAs, the Group provide rebates in invoice if payment is made before the due date. These are adjusted against revenue and are offset against amounts payable by the customers.

• Significant financing component

Significant financing component for customer contracts is considered for the length of time between the customers’ payment and the transfer of the performance obligation, as well as the prevailing interest rate in the market. The transaction price for these contracts is discounted, using the interest rate implicit in the contract. This rate is commensurate with the rate that would be reflected in a separate financing transaction between the Group and the customer at contract inception.

(ii) Contract balances

a) Contract assets

A contract asset is the right to consideration in exchange for goods or services transferred to the customer. If the Group performs by transferring goods or services to a customer before the customer pays consideration or before payment is due, a contract asset is recognised for the earned consideration that is conditional. Contract assets are subject to impairment assessment. Refer to accounting policies in section (o) Impairment of

non-financial

assets.

b) Contract liabilities

A contract liability is the obligation to transfer goods or services to a customer for which the Group has received consideration (or an amount of consideration is due) from the customer. If a customer pays consideration before the Group transfers goods or services to the customer, a contract liability is recognised when the payment is made or the payment is due (whichever is earlier). Contract liabilities are recognised as revenue when the Group performs under the contract (i.e., transfers control of the related goods or services to the customer).

c) Trade receivables

A receivable represents the Group’s right to an amount of consideration that is unconditional (i.e., only the passage of time is required before payment of the consideration is due). Refer to accounting policies of financial assets in section s) Financial instruments – initial recognition and subsequent measurement.

(iii) Others

a) Income from compensation for loss of revenue

Income from compensation for loss of revenue is recognised after certainty of receipt of the same is established.

b) Dividend

The Company recognises a liability to pay a dividend when the distribution is authorised and the distribution is no longer at the discretion of the Company.

f)	Foreign currencies

The Group’s consolidated financial statements are presented in INR, which is also the Company’s functional currency. For each entity, the Group determines the functional currency and items included in the financial statements of each entity are measured using that functional currency.

Foreign currency translation

Transactions in foreign currencies are initially recorded by the Group’s entities at their respective functional currency spot rates at the date the transaction first qualifies for recognition. Monetary assets and liabilities denominated in foreign currencies are translated at the functional currency spot rates of exchange at the reporting date. Differences arising on settlement or translation of monetary items are recognised in profit or loss with the exception of monetary items that are designated as part of the hedge of the Group’s net investment in a foreign operation. These are recognised in OCI until the net investment is disposed of, at which time, the cumulative amount is reclassified to profit or loss. Tax charges and credits attributable to exchange differences on those monetary items are also recognised in OCI.

Non-monetary

items that are measured in terms of historical cost in a foreign currency are translated using the exchange rates at the dates of the initial transactions.

Non-monetary

items measured at fair value in a foreign currency are translated using the exchange rates at the date when the fair value is determined.

The gain or loss arising on translation of

non-monetary

items measured at fair value is treated in line with the recognition of the gain or loss on the change in fair value of the item (i.e., translation differences on items whose fair value gain or loss is recognised in OCI or profit or loss are also recognised in OCI or profit or loss, respectively).

Group companies

On consolidation, the assets and liabilities of foreign operations are translated into INR at the rate of exchange prevailing at the reporting date and their statements of profit or loss are translated at exchange rates prevailing at the dates of the transactions. The exchange differences arising on translation for consolidation are recognised in OCI. On disposal of a foreign operation, the component of OCI relating to that particular foreign operation is reclassified to profit or loss.

Taxes

Current income tax

Current income tax assets and liabilities are measured at the amount expected to be recovered from or paid to the taxation authorities. The tax rates and tax laws used to compute the amount are those that are enacted or substantively enacted, at the reporting date in India. Current income tax relating to items recognised outside profit or loss is recognised outside profit or loss (either in OCI or equity). Management periodically evaluates positions taken in the tax returns with respect to situations in which applicable tax regulations are subject to interpretation and considers whether it is probable that a taxation authority will accept an uncertain tax treatment. The Group reflects the effect of uncertainty for each uncertain tax treatment by using either most likely method or expected value method, depending on which method predicts better resolution of the treatment. Current income tax assets and liabilities are offset if a legally enforceable right exists to set off these and intends either to settle on a net basis, or to realise the asset and settle the liability simultaneously.

Deferred tax

Deferred tax is provided using the asset-liability method on temporary differences between the tax bases of assets and liabilities and their carrying amounts for financial reporting purposes at the reporting date.

Deferred tax liabilities are recognised for all taxable temporary differences, except:

•

When the deferred tax liability arises from the initial recognition of goodwill or an asset or liability in a transaction that is not a business combination and, at the time of the transaction, affects neither the accounting profit nor taxable profit or loss.

•

In respect of taxable temporary differences associated with investments in subsidiaries, associates and interests in joint ventures, when the timing of the reversal of the temporary differences can be controlled and it is probable that the temporary differences will not reverse in the foreseeable future.

Deferred tax assets are recognised for all deductible temporary differences, the carry forward of unused tax credits and any unused tax losses. Deferred tax assets are recognised to the extent that it is probable that taxable profit will be available against which the deductible temporary differences, and the carry forward of unused tax credits and unused tax losses can be utilised except:

•

When the deferred tax asset relating to the deductible temporary difference arises from the initial recognition of an asset or liability in a transaction that is not a business combination and, at the time of the transaction, affects neither the accounting profit nor taxable profit or loss

•

in respect of deductible temporary differences associated with investments in subsidiaries, associates and interests in joint ventures, deferred tax assets are recognised only to the extent that it is probable that the temporary differences will reverse in the foreseeable future and taxable profit will be available against which the temporary differences can be utilised.

The carrying amount of deferred tax assets is reviewed at each reporting date and reduced to the extent that it is no longer probable that sufficient taxable profit will be available to allow all or part of the deferred tax asset to be utilised. Unrecognised deferred tax assets are

re-assessed

at each reporting date and are recognised to the extent that it has become probable that future taxable profits will allow the deferred tax asset to be recovered.

In situations where Group is entitled to a tax holiday under the

Income-tax

Act, 1961, enacted in India, no deferred tax (asset or liability) is recognised in respect of temporary differences which reverse during the tax holiday period. Deferred taxes in respect of temporary differences which reverse after the tax holiday period are recognised in the period in which the temporary differences originate. However, the Group restrict the recognition of deferred tax assets to the extent that it has become reasonably certain that sufficient future taxable income will be available against which such deferred tax assets can be realised.

Deferred tax assets and liabilities are measured at the tax rates that are expected to apply in the period when the asset is realised or the liability is settled, based on tax rates (and tax laws) that have been enacted or substantively enacted at the reporting date.

Deferred tax relating to items recognised outside profit or loss is recognised outside profit or loss (either in OCI or equity). Deferred tax items are recognised in correlation to the underlying transaction either in OCI or directly in equity.

Deferred tax assets and deferred tax liabilities are offset if a legally enforceable right exists to set off current tax assets against current tax liabilities and the deferred taxes relate to the same taxable entity and the same taxation authority.

Minimum Alternate Tax

Minimum alternate tax (MAT) paid in a year is charged to the statement of profit or loss as current tax for the year. The deferred tax asset is recognised for MAT credit available only to the extent that it is probable that the concerned company will pay normal income tax during the specified period, i.e., the period for which MAT credit is allowed to be carried forward. In the year in which the company recognises MAT credit as an asset, it is created by way of credit to the statement of profit or loss and shown as part of deferred tax asset. The company reviews the “MAT credit entitlement” asset at each reporting date and writes down the asset to the extent that it is no longer probable that it will pay normal tax during the specified period.

h)	Government grants

Government grants are recognised where there is reasonable assurance that the grant will be received and all attached conditions will be compiled with. When the grant related to an expense item, it is recognised as income on a systematic basis over the periods that related costs, for which it is intended to compensate, are expensed. When grant is related to an asset, it is recognised as income in equal amounts over the expected useful life of related asset.

When the Group receive grants of

non-monetary

assets, the asset and the grant are recorded at fair value amounts and released to profit or loss over the expected useful life in a pattern of consumption of the benefit of the underlying asset i.e. by equal annual instalments.

The Group presents grants related to an expense item as other income in the statement of profit or loss. Thus, generation based incentive and Sale of emission reduction certificates have been recognised as other income.

Generation based incentive

Generation based incentive is recognised on the basis of supply of units generated by the Group to the state electricity board from the eligible project in accordance with the scheme of the “Generation Based Incentive (GBI) for Grid Interactive Wind Power Projects”.

Subsidy (Viability Gap Funding)

The Group receives Viability Gap Funding (VGF) for setting up of certain solar power projects. The Group records the VGF proceeds on fulfilment of the underlying conditions as deferred government grant. Such deferred grant is recognised over the period of useful life of underlying asset.

i)	Property, plant and equipment

Capital work in progress is stated at cost, net of accumulated impairment loss, if any. Property, plant and equipment except freehold land is stated at cost, net of accumulated depreciation and accumulated impairment losses, if any. Such cost includes the cost of replacing part of the plant and equipment and borrowing costs for long-term construction projects if the recognition criteria are met. When significant parts of plant and equipment are required to be replaced at intervals, the Group depreciates them separately based on their specific useful lives. Likewise, when a major inspection is performed, its cost is recognised in the carrying amount of the plant and equipment as a replacement if the recognition criteria are satisfied. All other repair and maintenance costs are recognised in the statement of profit or loss as incurred. Freehold land is stated at cost net of accumulated impairment losses and is not depreciated.

The present value of the expected cost for the decommissioning of an asset after its use is included in the cost of the respective asset if the recognition criteria for a provision are met. Refer to significant accounting judgements, estimates and assumptions (note 55) and provisions (note 25) for further information about the recognised decommissioning provision.

Subsequent costs

The cost of replacing a part of an item of property, plant and equipment is recognised in the carrying amount of the item of property, plant and equipment, if it is probable that the future economic benefits embodied within the part will flow to the Group and its cost can be measured reliably with the carrying amount of the replaced part getting derecognised. The cost for

day-to-day

servicing of property, plant and equipment are recognised in statement of profit or loss as and when incurred.

Derecognition

An item of property, plant and equipment and any significant part initially recognised is derecognised upon disposal (i.e., at the date the recipient obtains control) or when no future economic benefits are expected from its use or disposal. Any gain or loss arising on derecognition of the asset (calculated as the difference between the net disposal proceeds and the carrying amount of the asset) is included in the statement of profit or loss when the asset is derecognised. Gains or losses arising from

de-recognition

of fixed assets are measured as the difference between the net disposal proceeds and the carrying amount of the asset and are recognised in the statement of profit or loss when the asset is derecognised.

j)	Intangible assets

Intangible assets acquired separately are measured in initial recognition at cost. The cost of intangible assets and intangible assets under development acquired in a business combination is their fair value at the date of acquisition. Following initial recognition, intangible assets are carried at cost less any accumulated amortisation and accumulated impairment losses and intangible assets under development are carried at cost less any accumulated impairment losses. The useful lives of intangible assets are assessed as either finite or indefinite.

Intangible assets with finite lives are amortised over the useful life and assessed for impairment whenever there is an indication that the intangible asset may be impaired.

An intangible asset is derecognised upon disposal (i.e., at the date the recipient obtains control) or when no future economic benefits are expected from its use or disposal. Any gain or loss arising upon derecognition of the asset (calculated as the difference between the net disposal proceeds and the carrying amount of the asset) is included in the statement of profit or loss.

Customer related intangibles are capitalised if they meet the definitions of an intangible asset and the recognition criteria are satisfied. Customer-related intangibles acquired as part of a business combination are valued at fair value and those acquired separately are measured at cost. Such intangibles are amortised over the remaining useful life of the customer relationships or the period of the contractual arrangements.

Intangible assets with indefinite useful lives are not amortised, but are tested for impairment annually, either individually or at the cash-generating unit level. The assessment of indefinite life is reviewed annually to determine whether the indefinite life continues to be supportable. If not, the change in useful life from indefinite to finite is made on a prospective basis.

Development costs

Development expenditures on an individual project are recognised as an intangible asset when the Group can demonstrate:

•

The technical feasibility of completing the intangible asset so that the asset will be available for use or sale

•

Its intention to complete and its ability and intention to use or sell the asset

•

How the asset will generate future economic benefits

•

The availability of resources to complete the asset

•

The ability to measure reliably the expenditure during development

Following initial recognition of the development expenditure as an asset, the asset is carried at cost less any accumulated amortisation and accumulated impairment losses. Amortisation of the asset begins when development is complete and the asset is available for use. It is amortised over the period of expected future benefit

k)	Depreciation / amortisation of property, plant and equipment and intangible assets

Depreciation and amortisation are calculated on a straight-line basis over the estimated useful lives of the assets as follows:


Category		Life (in years)
Plant and equipment (solar rooftop projects)*		25 or terms of PPA, whichever is less (15-25)
Plant and equipment (wind and solar power projects)*		30-35
Plant and equipment (others)		5-18
Office equipment		5
Furniture and fixture		10
Computers		3
Computer servers		6
Computer software		3-6
Customer contracts		25
Development rights		25
Leasehold improvements		Useful life or lease term (5 years), whichever is lower
Building (Temporary structure)		3

Based on an external technical assessment, the management believes that the useful lives as given above and residual value of

0%-5%,

best represents the period over which management expects to use its assets and its residual value.

The residual values, useful lives and methods of depreciation and amortisation of property, plant and equipment and intangible assets are reviewed at each financial period end and adjusted prospectively, if appropriate.

l)	Inventories

Inventories are valued at the lower of cost and net realisable value. Cost includes cost of purchase and other costs incurred in bringing the inventories to their present location and condition. Cost is determined on first in, first out basis.

Net realisable value is the estimated selling price in the ordinary course of business, less estimated costs of completion and the estimated costs necessary to make the sale. Unserviceable / damaged inventories are identified and written down based on technical evaluation.

m)	Borrowing costs

Borrowing costs directly attributable to the acquisition, construction or production of an asset that necessarily takes a substantial period of time to get ready for its intended use or sale. Borrowing costs consist of interest, discount on issue, premium payable on redemption and other costs that an entity incurs in connection with the borrowing of funds (this cost also includes exchange differences to the extent regarded as an adjustment to the borrowing costs). The borrowing costs are amortised basis the Effective Interest Rate (EIR) method over the term of the loan. The EIR amortisation is recognised under finance costs in the statement of profit or loss. The amount amortised for the period from disbursement of borrowed funds upto the date of capitalisation of the qualifying assets is added to cost of the qualifying assets.

To the extent, group borrows funds for general purpose and uses them for the purpose of obtaining a qualifying asset, the group determines the amount of borrowing costs eligible for capitalisation by applying a capitalisation rate to the expenditures on that asset. The capitalisation rate used is weighted average of the borrowing costs applicable to the borrowings of the group that are outstanding during the period, other than borrowings made specifically for the purpose of obtaining a qualifying asset. In case any specific borrowing remains outstanding after the related asset is ready for its intended use or sale, that borrowing becomes part of the funds that an entity borrows generally when calculating the capitalisation rate on general borrowings. The Group treats as part of general borrowings any borrowing originally made to develop a qualifying asset when substantially all of the activities necessary to prepare that asset for its intended use or sale are complete.

Leases

The Group assesses at contract inception whether a contract is, or contains, a lease. That is, if the contract conveys the right to control the use of an identified asset for a period of time in exchange for consideration.

As a lessee

The Group applies a single recognition and measurement approach for all leases, except for short-term leases and leases of

low-value

assets. The Group recognises lease liabilities to make lease payments and

right-of-use

assets representing the right to use the underlying assets.

Right-of-use

assets

The Group recognises

right-of-use

assets at the commencement date of the lease (i.e., the date the underlying asset is available for use).

Right-of-use

assets are measured at cost, less any accumulated depreciation and accumulated impairment losses, and adjusted for any remeasurement of lease liabilities. The cost of

right-of-use

assets includes the amount of lease liabilities recognised, initial direct costs incurred, and lease payments made at or before the commencement date less any lease incentives received.

Right-of-use

assets are depreciated on a straight-line basis over the shorter of the lease term and the estimated useful lives of the assets, as follows:

•

Leasehold land: 13 to 30 years

•

Building: 3 to 5 years

If ownership of the leased asset transfers to the Group at the end of the lease term or the cost reflects the exercise of a purchase option, depreciation is calculated using the estimated useful life of the asset.

The

right-of-use

assets are also subject to impairment. Refer to the accounting policies in section (o) Impairment of

non-financial

assets.

ii) Lease liabilities

At the commencement date of the lease, the Group recognises lease liabilities measured at the present value of lease payments to be made over the lease term. The lease payments include fixed payments (including

in-substance

fixed payments) less any lease incentives receivable, variable lease payments that depend on an index or a rate, and amounts expected to be paid under residual value guarantees. The lease payments also include the exercise price of a purchase option reasonably certain to be exercised by the Group and payments of penalties for terminating the lease, if the lease term reflects the Group exercising the option to terminate. Variable lease payments that do not depend on an index or a rate are recognised as expenses (unless they are incurred to produce inventories) in the period in which the event or condition that triggers the payment occurs.

In calculating the present value of lease payments, the Group uses its incremental borrowing rate at the lease commencement date because the interest rate implicit in the lease is not readily determinable. After the commencement date, the amount of lease liabilities is increased to reflect the accretion of interest and reduced for the lease payments made. In addition, the carrying amount of lease liabilities is remeasured if there is a modification, a change in the lease term, a change in the lease payments (example: changes to future payments resulting from a change in an index or rate used to determine such lease payments) or a change in the assessment of an option to purchase the underlying asset.

iii) Short-term leases and leases of

low-value

assets

The Group applies the short-term lease recognition exemption to its short-term leases (i.e., those leases that have a lease term of 12 months or less from the commencement date and do not contain a purchase option). It also applies the lease of

low-value

assets recognition exemption to leases of office equipment that are considered to be low value. Lease payments on short-term leases and leases of low value assets are recognised as expense on a straight-line basis over the lease term.

As a lessor

Leases in which the Group does not transfer substantially all the risks and rewards of ownership of an asset are classified as operating leases. Rental income from operating lease is recognised on a straight-line basis over the term of the relevant lease. Initial direct costs incurred in negotiating and arranging an operating lease are added to the carrying amount of the leased asset and recognised over the lease term on the same basis as rental income. Contingent rents are recognised as revenue in the period in which they are earned.

o)	Impairment of non-financial assets

The Group assess, at each reporting date, whether there is an indication that an asset may be impaired. If any indication exists, or when annual impairment testing for an asset is required, the Group estimate the asset’s recoverable amount. An asset’s recoverable amount is the higher of an asset’s or cash-generating units (CGU) fair value less costs of disposal and its value in use. Recoverable amount is determined for an individual asset, unless the asset does not generate cash inflows that are largely independent of those from other assets or group of assets. When the carrying amount of an asset or CGU exceeds its recoverable amount, the asset is considered impaired and is written down to its recoverable amount.

In assessing value in use, the estimated future cash flows are discounted to their present value using a pre

-tax

discount rate that reflects current market assessments of the time value of money and the risks specific to the asset. In determining fair value less costs of disposal, recent market transactions are taken into account. If no such transactions can be identified, an appropriate valuation model is used. These calculations are corroborated by valuation multiples, quoted share prices for publicly traded companies or other available fair value indicators.

The Group bases its impairment calculation on detailed budgets and forecast calculations, which are prepared separately for each of the Group’s CGUs to which the individual assets are allocated. These budgets and forecast calculations generally cover a remaining life of the power purchase agreements of the project considering the long term fixed rate firm agreements available.

Impairment losses of continuing operations, including impairment on inventories, are recognised in the statement of profit or loss.

For assets excluding goodwill, an assessment is made at each reporting date to determine whether there is an indication that previously recognised impairment losses no longer exist or have decreased. If such indication exists, the Group estimates the asset’s or CGU’s recoverable amount. A previously recognised impairment loss is reversed only if there has been a change in the assumptions used to determine the asset’s recoverable amount since the last impairment loss was recognised. The reversal is limited so that the carrying amount of the asset does not exceed its recoverable amount, nor exceed the carrying amount that would have been determined, net of depreciation, had no impairment loss been recognised for the asset in prior years. Such reversal is recognised in the statement of profit or loss unless the asset is carried at a revalued amount, in which case, reversal is treated as an increase in revaluation.

Intangible assets under development are tested for impairment annually on 31 March, or more frequently when there is an indication that these assets may be impaired, either individually or at the cash-generating unit level.

p)	Share based payments

Company provides additional benefits to certain members of senior management and employees of the Group in the form of share-based payments, whereby employees render services as consideration for equity instruments (equity-settled transactions).

Equity-settled transactions

The cost of equity-settled transactions is determined by the fair value at the date when the grant is made using an appropriate valuation model.

The cost is recognised, together with a corresponding increase in share-based payment reserve in equity, over the period in which the performance and / or service conditions are fulfilled in employee benefit expenses. The cumulative expense recognised for equity-settled transactions at each reporting date until the vesting date reflects the extent to which the vesting period has expired and the Group’s best estimate of the numbers of equity instruments that will ultimately vest. The statement of profit or loss expense or credit for a period represents the movement in cumulative expense recognised as at the beginning and end of that period and is recognised in employee benefit expense.

Service and

non-market

performance conditions are not taken into account when determining the grant date fair value of awards, but the likelihood of the conditions being met is assessed as part of the Group’s best estimate of the number of equity instruments that will ultimately vest. Market performance conditions are reflected within the grant date fair value. Any other condition attached to an award, but without associated service requirement, are considered to be

non-vesting

conditions.

Non-vesting

conditions are reflected in the fair value of an award and lead to an immediate expensing of an award unless there are also service and / or performance conditions.

No expense is recognised for awards that do not ultimately vest because of

non-market

performance and / or service conditions have not been met. Where awards include a market or

non-market

condition, the transaction are treated as vested irrespective of whether the market or

non-vesting

condition is satisfied, provided that all other performance and/or service condition are satisfied.

When the terms of an equity-settled award are modified, the minimum expense recognised is the grant date fair value of the unmodified award, provided the original vesting terms of the award are met. An additional expense, measured as at the date of modification, is recognised for any modification that increases the total fair value of the share-based payment transaction, or is otherwise beneficial to the employee. Where an award is cancelled by the entity or by the counterparty, any remaining element of the fair value of the award is expensed immediately through the statement of profit or loss.

The dilutive effect of outstanding options is reflected as additional share dilution in the computation of diluted earnings per share.

On repurchase of vested equity instruments by the Group, the payment made to the employee shall be accounted for as a deduction from equity, except to the extent that the payment exceeds the fair value of the equity instruments repurchased, measured at the repurchase date. Any such excess shall be recognised as an expense in the statement of profit or loss.

Cash-settled transactions

A liability is recognised for the fair value of cash-settled transactions. The fair value is measured initially and at each reporting date up to and including the settlement date, with changes in fair value recognised in employee benefits expense (refer note 34). The fair value is expensed over the period until the vesting date with recognition of a corresponding liability. The fair value is determined using a Black-Scholes model, further details of which are given in Note 42. The approach used to account for vesting conditions when measuring equity-settled transactions also applies to cash-settled transactions.

q)	Retirement and other employee benefits

Retirement benefit in the form of provident fund is a defined contribution scheme. The Group has no obligation, other than the contribution payable to the provident fund. The Group recognise contribution payable to provident fund scheme as an expense, when an employee renders the related service.

Remeasurements comprising of actuarial gain and losses, the effect of the asset ceiling, excluding amount recognised in the net interest on the defined benefit liability and the return on plan assets (excluding amounts included in net interest on the net defined benefit liability), are recognised in the statement of financial position with a corresponding debit or credit to retained earnings through OCI in the period in which they occur. Remeasurements are not reclassified to the statement of profit or loss in subsequent periods.

The Group operates a defined benefit plan in India, viz., gratuity. The cost of providing benefit under this plan is determined on the basis of actuarial valuation at each

period-end

carried out using the projected unit cost method.

Past service costs are recognised in statement of profit or loss on the earlier of:

•

The date of the plan amendment or curtailment; and

•

The date that the Group recognises related restructuring costs

Net interest is calculated by applying the discount rate to the net defined benefit liability or asset. The Group recognises the following changes in the net defined benefit obligation as an expense in the statement of profit or loss:

•

Service costs comprising current service costs, past-service costs, gains and losses on curtailments and

non-routine

settlements; and

•

Net interest expense or income

Accumulated leave, which is expected to be utilised within the next twelve months, is treated as short term employee benefit. The Group measures the expected cost of such absences as an additional amount that it expects to pay as a result of the unused entitlement that has accumulated at reporting date.

The Group treats the accumulated leave expected to be carried forward beyond twelve months, as long term employee benefit for measurement purposes. Such long term compensated absences are determined on the basis of actuarial valuation at each

period-end

carried out using the projected unit cost method. Remeasurements comprising of actuarial gain and losses are recognised in the statement of financial position with a corresponding debit or credit to profit or loss in the period in which they occur. The Group presents the leave as current liability in the balance sheet, to the extent is does not have an unconditional right to defer its settlement for 12 months after the reporting date. Where Group has unconditional legal and contractual right to defer the settlement for a period beyond 12 months, the same is presented as

non-current

liability.

r)	Provisions

Provisions are recognised when the Group has a present obligation (legal or constructive) as a result of a past event, it is probable that an outflow of resources embodying economic benefits will be required to settle the obligation and a reliable estimate can be made of the amount of the obligation. When the Group expects some or all of a provision to be reimbursed, for example, under an insurance contract, the reimbursement is recognised as a separate asset, but only when the reimbursement is virtually certain. The expense relating to a provision is presented in the statement of profit or loss net of any reimbursement.

If the effect of the time value of money is material, provisions are discounted using a current

pre-tax

rate that reflects, when appropriate, the risks specific to the liability. When discounting is used, the increase in the provision due to the passage of time is recognised as a finance cost.

Decommissioning liability

The Group considers constructive obligations and records a provision for decommissioning costs of the wind and solar power plants. Decommissioning costs are provided for at the present value of expected costs to settle the obligation using estimated cash flows and are recognised as part of the cost of the relevant asset. The cash flows are discounted at a current

pre-tax

rate that reflects the risks specific to the decommissioning liability. The unwinding of the discount is expensed as incurred and recognised in the statement of profit or loss as a finance cost. The estimated future costs of decommissioning are reviewed annually and adjusted as appropriate. Changes in the estimated future costs, or in the discount rate applied, are added to or deducted from the cost of the asset.

s)	Financial instruments

A financial instrument is any contract that gives rise to a financial asset of one entity and a financial liability or equity instrument of another entity.

Financial assets

Initial recognition and measurement

Financial assets are classified, at initial recognition, as subsequently measured at amortised cost, fair value through other comprehensive income (FVTOCI), and fair value through profit or loss (FVTPL).

The classification of financial assets at initial recognition depends on the financial asset’s contractual cash flow characteristics and the Group’s business model for managing them. With the exception of trade receivables that do not contain a significant financing component or for which the Group has applied the practical expedient, the Group initially measures a financial asset at its fair value plus, in the case of a financial asset not at FVTPL, transaction costs. Trade receivables that do not contain a significant financing component or for which the Group has applied the practical expedient are measured at the transaction price as disclosed in section (e) Revenue from contracts with customers.

Purchases or sales of financial assets that require delivery of assets within a time frame established by regulation or convention in the market place (regular way trades) are recognised on the trade date, i.e., the date that the Group commits to purchase or sell the asset.

Subsequent measurement

For purposes of subsequent measurement, financial assets are classified in four categories:

Debt instruments at amortised cost

A ‘debt instrument’ is measured at the amortised cost if both the following conditions are met:

a) The asset is held within a business model whose objective is to hold assets for collecting contractual cash flows; and

b) Contractual terms of the asset give rise on specified dates to cash flows that are solely payments of principal and interest on the principal amount outstanding.

After initial measurement, such financial assets are subsequently measured at amortised cost using the EIR method. Amortised cost is calculated by taking into account any discount or premium on acquisition and fees or costs that are an integral part of the EIR. The EIR amortisation is included in other income in the statement of profit or loss. The losses arising from impairment are recognised in the statement of profit or loss.

Debt instruments at FVTOCI

A ‘debt instrument’ is classified as at the FVTOCI if both of the following criteria are met: a) The objective of the business model is achieved both by collecting contractual cash flows and selling the financial assets; and b) The asset’s contractual cash flows represent solely payments of principal and interest.

Debt instruments included within FVTOCI category are measured initially as well as at each reporting date at fair value. Fair value movements are recognised in OCI. However, the Group recognises interest income, impairment losses and reversals and foreign exchange gain or loss in the statement of profit or loss. On derecognition of the asset, cumulative gain or loss previously recognised in OCI is reclassified from the equity to statement of profit or loss. Interest earned whilst holding FVTOCI debt instrument is reported as interest income using the EIR method.

Debt instruments at FVTPL

FVTPL is a residual category for debt instruments. Any debt instrument, which does not meet the criteria for categorisation as at amortised cost or as FVTOCI, is classified as at FVTPL.

In addition, the Group may elect to designate a debt instrument, which otherwise meets amortised cost or FVTOCI criteria, as at FVTPL. However, such election is allowed only if doing so reduces or eliminates a measurement or recognition inconsistency (referred to as ‘accounting mismatch’). The Group has not designated any debt instrument as at FVTPL.

Debt instruments included within FVTPL category are measured at fair value with all changes recognised in the statement of profit or loss.

Equity investments

All other equity investments in scope of IFRS 9 are measured at fair value. Equity instruments which are held for trading and contingent consideration recognised by an acquirer in a business combination to which IFRS 3 applies are classified at FVTPL. For all other equity instruments, the Group may make an irrevocable election to present in other comprehensive income subsequent changes in the fair value. The Group makes such election on an

instrument-by-instrument

basis. The classification is made on initial recognition and is irrevocable.

If the Group decides to classify an equity instrument as at FVTOCI, then all fair value changes on the instrument, excluding dividends, are recognised in the OCI. There is no recycling of the amounts from OCI to statement of profit or loss, even on sale of investment. However, the Group may transfer the cumulative gain or loss within equity.

Equity instruments included within FVTPL category are measured at fair value with all changes recognised in the statement of profit or loss.

Embedded derivatives

A derivative embedded in a hybrid contract, with a financial liability or

non-financial

host, is separated from the host and accounted for as a separate derivative if: the economic characteristics and risks are not closely related to the host; a separate instrument with the same terms as the embedded derivative would meet the definition of a derivative; and the hybrid contract is not measured at FVTPL. Embedded derivatives are measured at fair value with changes in fair value recognised in profit or loss. Reassessment only occurs if there is either a change in the terms of the contract that significantly modifies the cash flows that would otherwise be required or a reclassification of a financial asset out of the FVTPL category.

Derecognition

A financial asset (or, where applicable, a part of a financial asset or part of a group of similar financial assets) is primarily derecognised when:

•

The rights to receive cash flows from the asset have expired, or

•

The respective Group has transferred their rights to receive cash flows from the asset or have assumed the obligation to pay the received cash flows in full without material delay to a third party under a ‘pass-through’ arrangement; and

•

Either the Group has transferred substantially all the risks and rewards of the asset, or has neither transferred nor retained substantially all the risks and rewards of the asset, but have transferred control of the asset.

When the Group has transferred its rights to receive cash flows from an asset or has entered into a pass-through arrangement, it evaluates if and to what extent it has retained the risks and rewards of ownership. When it has neither transferred nor retained substantially all of the risks and rewards of the asset, nor transferred control of the asset, the Group continues to recognise the transferred asset to the extent of the continuing involvement of Group. In that case, the Group also recognises an associated liability. The transferred asset and the associated liability are measured on a basis that reflects the rights and obligations that the Group has retained.

Continuing involvement that takes the form of a guarantee over the transferred asset is measured at the lower of the original carrying amount of the asset and the maximum amount of consideration that the Group could be required to repay.

Impairment of financial assets

In accordance with IFRS 9, the Group applies expected credit loss (ECL) model for measurement and recognition of impairment loss for all debt instruments not held at FVTPL. ECLs are based on the difference between the contractual cash flows due in accordance with the contract and all the cash flows that the Group expects to receive, discounted at an approximation of the original effective interest rate.

The Group follows ‘simplified approach’ for recognition of impairment loss allowance on trade receivables or contract revenue receivables. The Group has established a provision matrix that is based on its historical credit loss experience, adjusted for forward-looking factors specific to the debtors and the economic environment.

The assessment of the correlation between historical observed default rates, forecast economic conditions and ECLs is a significant estimate. The amount of ECLs is sensitive to changes in circumstances and of forecast economic conditions. The Group’s historical credit loss experience and forecast of economic conditions may also not be representative of customer’s actual default in the future.

The application of simplified approach does not require the Group to track changes in credit risk. Rather it recognises impairment loss allowance based on lifetime ECLs at each reporting date, right from initial recognition.

For recognition of impairment loss on other financial assets and risk exposure, the group determines that whether there has been a significant increase in the credit risk since initial recognition. If credit risk has not increased significantly,

12-month

ECL is used to provide for impairment loss. However, if credit risk has increased significantly, lifetime ECL is used. If, in a subsequent period, credit quality of the instrument improves such that there is no longer a significant increase in credit risk since initial recognition, then the entity reverts to recognising impairment loss allowance based on

12-month

ECL. The Group considers that there has been a significant increase in credit risk when contractual payments are more than 30 days past due.

Lifetime ECL are the expected credit losses resulting from all possible default events over the expected life of a financial instrument. The

12-month

ECL is a portion of the lifetime ECL which results from default events that are possible within 12 months after the reporting date.

The Group considers a financial asset in default when contractual payments are 90 days past due. However, in certain cases, the Group may also consider a financial asset to be in default when internal or external information indicates that the Group is unlikely to receive the outstanding contractual amounts in full before taking into account any credit enhancements held by the Group. A financial asset is written off when there is no reasonable expectation of recovering the contractual cash flows.

For financial guarantee contracts, the date that the Group becomes a party to the irrevocable commitment is considered to be the date of initial recognition for the purposes of assessing the financial instrument for impairment. In assessing whether there has been a significant increase in the credit risk since initial recognition of a financial guarantee contracts, the Group considers the changes in the risk that the specified debtor will default on the contract.

For a financial guarantee contract, as the Group is required to make payments only in the event of a default by the debtor in accordance with the terms of the instrument that is guaranteed, the expected loss allowance is the expected payments to reimburse the holder for a credit loss that it incurs less any amounts that the Group expects to receive from the holder, the debtor or any other party.

The Group regularly monitors the effectiveness of the criteria used to identify whether there has been a significant increase in credit risk and revises them as appropriate to ensure that the criteria are capable of identifying significant increase in credit risk before the amount becomes past due.

ECL impairment loss allowance (or reversal) during the period is recognised as income / expense in the statement of profit or loss.

Financial liabilities

Initial recognition and measurement

Financial liabilities are classified, at initial recognition, as financial liabilities at FVTPL, loans and borrowings, payables, or as derivatives designated as hedging instruments in an effective hedge, as appropriate. All financial liabilities are recognised initially at fair value and in the case of loans and borrowings and payables, net of directly attributable transaction costs. The financial liabilities of the Group include trade and other payables, derivative financial instruments, loans and borrowings including bank overdraft.

Subsequent measurement

The measurement of financial liabilities depends on their classification as discussed below:

Loans and borrowings

After initial recognition, interest-bearing loans and borrowings are subsequently measured at amortised cost using the EIR method. Gains and losses are recognised in profit or loss when the liabilities are derecognised as well as through the EIR amortisation process.

Amortised cost is calculated by taking into account any discount or premium on acquisition and fees or costs that are an integral part of the EIR. The EIR amortisation is included as finance costs in the statement of profit or loss. This category generally applies to borrowings.

Compulsorily convertible preference shares

Compulsorily Convertible Preference Shares (CCPS) are separated into liability and equity components based on the terms of the contract.

On issuance of the CCPS, the fair value of the liability component is determined using a market rate for an equivalent

non-convertible

instrument. This amount is classified as a financial liability measured at amortised cost (net of transaction costs) until it is extinguished on conversion or redemption. The remainder of the proceeds is allocated to the conversion option that is recognised and included in equity since conversion option meets IAS 32 criteria for fixed to fixed classification. Transaction costs are deducted from equity and liability on

pro-rata

basis, net of associated income tax. The carrying amount of the conversion option is not remeasured in subsequent years.

Transaction costs are apportioned between the liability and equity components of the CCPS based on the allocation of proceeds to the liability and equity components when the instruments are initially recognised.

Compound instruments—Compulsorily Convertible Debentures

Compulsorily Convertible Debentures (CCDs) are separated into liability and equity components based on the terms of the contract

The Group recognises interest, dividends, losses and gains relating to such financial instrument or a component that is a financial liability as income or expense in the statement of profit or loss.

The present value of the liability part of the compulsorily convertible debentures classified under financial liabilities and the equity component is calculated by subtracting the liability from the total proceeds of CCDs.

Transaction costs that relate to the issue of a compound financial instrument are allocated to the liability and equity components of the instrument in proportion to the allocation of proceeds. Transaction costs that relate jointly to more than one transaction (for example, cost of issue of debentures, listing fees) are allocated to those transactions using a basis of allocation that is rational and consistent with similar transactions.

Financial guarantees

Financial guarantee contracts issued by the group are those contracts that require a payment to be made to reimburse the holder for a loss it incurs because the specified debtor fails to make a payment when due in accordance with the terms of a debt instrument. Financial guarantee contracts are recognised initially as a liability at fair value, adjusted for transaction costs that are directly attributable to the issuance of the guarantee. Subsequently, the liability is measured at the higher of the amount of loss allowance determined as per impairment requirements of IFRS 9 and the amount recognised less, when appropriate, the cumulative amount of income recognised in accordance with the principles of IFRS 15.

Derecognition

A financial liability is derecognised when the obligation under the liability is discharged / cancelled or expires. When an existing financial liability is replaced by another from the same lender on substantially different terms, or the terms of an existing liability are substantially modified, such an exchange or modification is treated as the derecognition of the original liability and the recognition of a new liability. The difference in the respective carrying amounts is recognised in the statement of profit or loss.

Reclassification of financial assets and liabilities

The Group determines classification of financial assets and liabilities on initial recognition. After initial recognition, no reclassification is made for financial assets which are equity instruments and financial liabilities. For financial assets which are debt instruments, a reclassification is made only if there is a change in the business model for managing those assets. Changes to the business model are expected to be infrequent.

The Group’s senior management determines change in the business model as a result of external or internal changes which are significant to the Group’s operations. Such changes are evident to external parties. A change in the business model occurs when the Group either begins or ceases to perform an activity that is significant to its operations. If the Group reclassifies financial assets, it applies the reclassification prospectively from the reclassification date which is the first day of the immediately next reporting period following the change in business model. The Group does not restate any previously recognised gains, losses (including impairment gains or losses) or interest.

Offsetting of financial instruments

Financial assets and financial liabilities are offset and the net amount is reported in the statement of financial position if there is a currently enforceable legal right to offset the recognised amounts and there is an intention to settle on a net basis, to realise the assets and settle the liabilities simultaneously.

t)	Derivative financial instruments and hedge accounting

Initial recognition and subsequent measurement

The Group uses derivative financial instruments, such as foreign currency forward contracts, cross currency swaps (CCS), call spreads, foreign currency option contracts and interest rate swaps (IRS), to hedge its interest rate risks and foreign currency risks. Such derivative financial instruments are initially recognised at fair value on the date on which a derivative contract is entered into and are subsequently

re-measured

at fair value. Derivatives are carried as financial assets when the fair value is positive and as financial liabilities when the fair value is negative.

Any gains or losses arising from changes in the fair value of derivatives are taken directly to profit or loss, except for the effective portion of cash flow hedges, which is recognised in OCI and later reclassified to profit or loss when the hedge item affects profit or loss or treated as basis adjustment if a hedged forecast transaction subsequently results in the recognition of a

non-financial

asset or

non-financial

liability.

For the purpose of hedge accounting, hedges are classified as:

•

Fair value hedges when hedging the exposure to changes in the fair value of a recognised asset or liability or an unrecognised firm commitment

•

Cash flow hedges when hedging the exposure to variability in cash flows that is either attributable to a particular risk associated with a recognised asset or liability or a highly probable forecast transaction or the foreign currency risk in an unrecognised firm commitment

•

Hedges of a net investment in a foreign operation

At the inception of a hedge relationship, the Group formally designates and documents the hedge relationship to which the Group wishes to apply hedge accounting and the risk management objective and strategy for undertaking the hedge.

The documentation includes identification of the hedging instrument, the hedged item, the nature of the risk being hedged and how the Group will assess whether the hedging relationship meets the hedge effectiveness requirements (including the analysis of sources of hedge ineffectiveness and how the hedge ratio is determined). A hedging relationship qualifies for hedge accounting if it meets all of the following effectiveness requirements:

•

There is ‘an economic relationship’ between the hedged item and the hedging instrument.

•

The effect of credit risk does not ‘dominate the value changes’ that result from that economic relationship.

•

The hedge ratio of the hedging relationship is the same as that resulting from the quantity of the hedged item that the Group actually hedges and the quantity of the hedging instrument that the Group actually uses to hedge that quantity of hedged item.

Hedges that meet the strict criteria for hedge accounting are accounted for, as described below:

Cash flow hedges

The effective portion of the gain or loss on the hedging instrument is recognised in OCI in the cash flow hedge reserve, while any ineffective portion is recognised immediately in the statement of profit or loss. The cash flow hedge reserve is adjusted to the lower of the cumulative gain or loss on the hedging instrument and the cumulative change in fair value of the hedged item.

The Group uses forward currency contracts as hedges of its exposure to foreign currency risk in forecast transactions and firm commitments, as well as forward commodity contracts for its exposure to volatility in the commodity prices. The ineffective portion relating to foreign currency contracts is recognised as other expense and the ineffective portion relating to commodity contracts is recognised in other operating income or expenses.

The Group designates only the forward element of forward contracts as a hedging instrument. The amounts accumulated in OCI are accounted for, depending on the nature of the underlying hedged transaction. If the hedged transaction subsequently results in the recognition of a

non-financial

item, the amount accumulated in equity is removed from the separate component of equity and included in the initial cost or other carrying amount of the hedged asset or liability. This is not a reclassification adjustment and will not be recognised in OCI for the period. This also applies where the hedged forecast transaction of a

non-financial

asset or

non-financial

liability subsequently becomes a firm commitment for which fair value hedge accounting is applied.

When option contracts are used, the Group uses only intrinsic value of the option as the hedging instrument. Gains or losses relating to the effective portion of the changes in intrinsic value of the option are recognised in the cash flow hedging reserve which equity. The changes in the time value of money that relate to the hedged item are recognised within other comprehensive income in the cost of hedging reserve within equity.

For any other cash flow hedges, the amount accumulated in OCI is reclassified to profit or loss as a reclassification adjustment in the same period or periods during which the hedged cash flows affect profit or loss.

If cash flow hedge accounting is discontinued, the amount that has been accumulated in OCI must remain in accumulated OCI if the hedged future cash flows are still expected to occur. Otherwise, the amount will be immediately reclassified to profit or loss as a reclassification adjustment. After discontinuation, once the hedged cash flow occurs, any amount remaining in accumulated OCI must be accounted for depending on the nature of the underlying transaction as described above.

u)	Cash and bank balances

(i) Cash and cash-equivalents

Cash and short-term deposits in the statement of financial position comprise cash at banks and cash in hand and short-term deposits with an original maturity of three months or less, that are readily convertible to a known amount of cash and subject to an insignificant risk of changes in value. For the purpose of the statement of cash flows, cash and cash equivalents consist of cash and short term deposits, as defined above, net of bank overdrafts as they are considered an integral part of the Group’s cash management.

(ii) Bank balances other than cash and cash equivalents

Bank balances other than cash and cash equivalents consists of deposits with an original maturity of more than three months. These balances are classified into current and

non-current

portions based on the remaining term of the deposit.

v)	Contingent liabilities

Contingent liabilities are disclosed when there is a possible obligation arising from past events, the existence of which will be confirmed only by the occurrence or

non-occurrence

of one or more uncertain future events not wholly within the control of the Group or a present obligation that arises from past events where it is either not probable that an outflow of resources will be required to settle or a reliable estimate of the amount cannot be made.

w)	Earnings per equity share (EPS)

Basic earnings per equity share is computed by dividing the net profit attributable to the equity holders of the Parent by the weighted average number of equity shares and instruments mandatorily convertible into equity shares outstanding during the period. Diluted earnings per equity share is computed by dividing the net profit attributable to the equity holders of the Group by the weighted average number of equity shares considered for deriving basic earnings per equity share and also the weighted average number of equity shares that could have been issued upon conversion of all dilutive potential equity shares. The dilutive potential equity shares are adjusted for the proceeds receivable had the equity shares been actually issued at fair value (i.e. the average market value of the outstanding equity shares). Dilutive potential equity shares are deemed converted as of the beginning of the period, unless issued at a later date. Dilutive potential equity shares are determined independently for each period presented.

The number of equity shares and potentially dilutive equity shares are adjusted retrospectively for all periods presented for any share splits and bonus shares issues including for changes effected prior to the approval of the consolidated financial statements by the Board of Directors. The dilutive effect of outstanding options is reflected as additional share dilution in the computation of diluted earnings per share.

x)	Non-current assets (and disposal groups) classified as held for sale

The Group classifies

non-current

assets and disposal groups as held for sale if their carrying amounts will be recovered principally through a sale transaction rather than through continuing use.

Non-current

assets and disposal groups classified as held for sale are measured at the lower of their carrying amount and fair value less costs to sell. Costs to sell are the incremental costs directly attributable to the disposal of an asset (disposal group), excluding finance costs and income tax expense.

The criteria for held for sale classification is regarded as met only when the sale is highly probable, and the asset or disposal group is available for immediate sale in its present condition. Actions required to complete the sale should indicate that it is unlikely that significant changes to the sale will be made or that the decision to sell will be withdrawn. Management must be committed to the plan to sell the asset and the sale expected to be completed within one year from the date of the classification.

Property, plant and equipment, intangible assets and right of use assets are not depreciated or amortised once classified as held for sale.

Assets and liabilities classified as held for sale are presented separately as current items in the statement of financial position.

Immediately prior to classification as held for sale, the assets or groups of assets were remeasured in accordance with the Group’s accounting policies. Subsequently, assets and disposal groups classified as held for sale were valued at the lower of book value or fair value less disposal costs. A gain or loss not previously recognised by the date of sale of

non-current

assets (or disposal group) is recognised at the date of

de-recognition.

4.2	New standards, interpretations and amendments

4.2.1. New and amended standards and interpretations adopted by the Group

The Group applied for the first-time certain standards and amendments, which are effective for annual periods beginning on or after 1 April 2020. The Group has not early adopted any other standard, interpretation or amendment that has been issued but is not yet effective.

Amendments to IAS 1 and IAS 8 Definition of Material

The amendments provide a new definition of material that states, “information is material if omitting, misstating or obscuring it could reasonably be expected to influence decisions that the primary users of general purpose financial statements make on the basis of those financial statements, which provide financial information about a specific reporting entity.” The amendments clarify that materiality will depend on the nature or magnitude of information, either individually or in combination with other information, in the context of the financial statements. A misstatement of information is material if it could reasonably be expected to influence decisions made by the primary users. These amendments had no impact on the consolidated financial statements of, nor is there expected to be any future impact to the Group.

Amendments to IFRS 3: Definition of a Business

The amendment to IFRS 3—Business Combinations clarifies that to be considered a business, an integrated set of activities and assets must include, at a minimum, an input and a substantive process that, together, significantly contribute to the ability to create output. Furthermore, it clarifies that a business can exist without including all of the inputs and processes needed to create outputs. These amendments had no impact on the consolidated financial statements of the Group, but may impact future periods should the Group enter into any business combinations.

Several other amendments and interpretations apply for the first time in the year ended 31 March 2021, but do not have an impact on the consolidated financial statements of the Group.

4.2.2. Standards issued but not yet effective

The new and amended standards and interpretations that are issued, but not yet effective, up to the date of issuance of the Group’s financial statements are disclosed below. The Group intends to adopt these new and amended standards and interpretations, if applicable, when they become effective.

COVID-19

related rent concessions—amendment to IFRS 16

On 28 May 2020, the IASB issued

COVID-19

Related Rent Concessions—amendment to IFRS 16 Leases The amendments provide relief to lessees from applying IFRS 16 guidance on lease modification accounting for rent concessions arising as a direct consequence of the

Covid-19

pandemic. As a practical expedient, a lessee may elect not to assess whether a

Covid-19

related rent concession from a lessor is a lease modification. A lessee that makes this election accounts for any change in lease payments resulting from the

Covid-19

related rent concession the same way it would account for the change under IFRS 16, if the change were not a lease modification. The amendment applies to annual reporting periods beginning on or after 1 June 2020. Earlier application is permitted. This amendment had no impact on the consolidated financial statements of the Group.

Further the following new and amended standards and interpretations that are issued, but not yet effective, up to the date of issuance of the Group’s financial statements which are not expected to have any material impact on the financial statements of the Group are disclosed below:

•

Amendments to IFRS 9—Financial Instruments—Fees in the ‘10 percent’ test for derecognition of financial liabilities (effective from 1 January 2022*)

•

Amendments to IAS 12—Deferred Tax related to Assets and Liabilities arising from a Single Transaction (effective from 1 January 2023*)

•

Amendments to IAS 1 and IFRS Practice Statement 2—Disclosure of Accounting Policies (effective from 1 January 2023*)

•

Amendments to IAS 16—Property, Plant and Equipment: Proceeds before Intended Use (effective from 1 January 2022*)

•

Amendment to IFRS

16—Covid-19-Related

Rent Concessions beyond 30 June 2021 (effective from 1 April 2021*)

•

Amendments to IFRS 3—Reference to the Conceptual Framework (effective from 1 January 2022*)

•

Amendments to IAS 37—Onerous Contracts—Costs of Fulfilling a Contract (effective from 1 January 2022*)

•

Amendments to IAS 1—Classification of Liabilities as Current or

Non-current

(effective from 1 January 2023*)

•

Amendments to IAS 8—Definition of Accounting Estimates (effective from 1 January 2023*)

Effective for annual periods beginning on or after this date.

Property, plant and equipment

12 Months Ended

Mar. 31, 2021

Property, plant and equipment

5	Property, plant and equipmen t


	Freehold Land #			Plant and equipment			Buildings		Leasehold improvements		Office equipment			Furniture and fixtures		Computers			Capital work in progress			Total property, plant and equipment
Cost
As at 1 April 2019		8,705			295,406			65		124		56			49		64			16,269			320,738
Additions during the year^		1,258			48,419			—		6		12			8		26			49,218			98,947
Adjustments during the year*		(73	)		(51	)		—		—		—			—		—			(188	)		(312	)
Disposals during the year**		—			(95	)		—		—		(1	)		—		(4	)		(27	)		(127	)
Capitalised during the year		—			—			—		—		—			—		—			(47,373	)		(47,373	)

As at 31 March 2020		9,890			343,679			65		130		67			57		86			17,899			371,873
Additions during the year^		603			31,179			12		5		9			7		33			22,725			54,573
Acquisition of subsidiaries (refer note 54)		57			2,500			—		—		1			1		1			—			2,560
Disposal of subsidiary (refer note 39)		—			(14,998	)		—		—		(1	)		—		(0	)		—			(14,999	)
Adjustments during the year*		(19	)		(265	)		—		—		(1	)		—		(1	)		(4	)		(290	)
Disposals during the year**		—			(242	)		—		—		(1	)				(4	)		(39	)		(286	)
Capitalised during the year		—			—			—		—		—			—		—			(30,176	)		(30,176	)

As at 31 March 2021		10,531			361,853			77		135		74			65		115			10,405			383,255

Accumulated depreciation
As at 1 April 2019		—			21,237			15		25		20			9		30			—			21,336
Charge for the year (refer note 35)		—			9,827			3		11		7			6		11			—			9,865
Depreciation capitalised during the year		—			2			—		15		6			2		7			—			32
Adjustments during the year*		—			0			—		—		—			—		—			—			0
Disposals during the year		—			(0	)		—		—		(1	)		—		(4	)		—			(5	)

As at 31 March 2020		—			31,066			18		51		32			17		44			—			31,228
Charge for the year (refer note 35)		—			10,568			3		14		9			9		12			—			10,615
Depreciation capitalised during the year		—			4			—		13		6			2		7			—			32
Disposal of a subsidiary (refer note 39)		—			(615	)		—		—		(1	)		—		(0	)		—			(616	)
Disposals during the year		—			(35	)		—		—		(1	)		—		(4	)		—			(40	)

As at 31 March 2021		—			40,988			21		78		45			28		59			—			41,219

Net book value
As at 1 April 2019		8,705			274,169			50		99		36			40		34			16,269			299,402

As at 31 March 2020		9,890			312,613			47		79		35			40		42			17,899			340,645

As at 31 March 2021		10,531			320,865			56		57		29			37		56			10,405			342,036

The title represented by sale deeds in respect of land amounting to INR 379 (31 March 2020: INR 395) is not yet in the name of the Group. Further, the title of land amounting to INR

429

(31 March 2020: INR

510

) is held by way of General Power of Attorney (GPA) and the Group is in the process of getting title transferred in its name.

Mortgage and hypothecation on property, plant and equipment:

Property, plant and equipment are subject to a pari passu first charge to respective lenders for project term loans, buyer’s/supplier’s credit, senior secured notes, working capital loan, debentures and acceptances as disclosed in note 19 and 27.


^ Capitalised borrowing costs		The amount of borrowing costs capitalised in property, plant and equipment and capital work in progress during the year ended 31 March 2021 was INR 2,072 (31 March 2020 INR 1,928). The rate ranging of 6.03% to 15.02% used to determine borrowing costs eligible for capitalisation was the effective interest rate of specific borrowings and capitalisation rate of general borrowings.

Adjustments to property, plant and equipment are as follows:


Freehold land		Adjustment of INR 19 (31 March 2020: INR 73) pertains to actualisation of provisional capitalisation.
Plant and equipments		Adjustment of INR 265 (31 March 2020: INR 51) pertains to actualisation of provisional capitalisation of supply of goods and services and early closure of letter of credits.
Capital work in progress		Adjustment of INR 4 (31 March 2020: INR 188) pertains to actualisation of provision against capital expenditure.

Disposals in capital work in progress includes INR 39 (31 March 2020: INR 27) that has been written off to the extent of

non-viability

of recovery of cost in future.

Intangible assets

12 Months Ended

Mar. 31, 2021

Intangible assets

6	Intangible assets


	Computer software		Customer contracts#		Development rights		Other intangible assets		Goodwill		Intangible asset under development*			Total intangible assets
Cost
As at 1 April 2019		160		26,744		36		—		11,381		6			38,327
Additions during the year		19		—		—		—		—		60			79
Capitalised during the year		—		—		—		—		—		(13	)		(13	)

As at 31 March 2020		179		26,744		36		—		11,381		53			38,393
Additions during the year		86		—		—		—		215		49			350
Acquisition of subsidiaries (refer note 54)		7		1,304		—		7		—		20			1,338
Capitalised during the year		—		—		—		—		—		(67	)		(67	)

As at 31 March 2021		272		28,048		36		7		11,596		55			40,014

Amortisation
As at 1 April 2019		64		1,197		2		—		—		—			1,263
Charge for the year (refer note 35)		30		1,114		1		—		—		—			1,145
Amortisation capitalised during the year		—		15		—		—		—		—			15

As at 31 March 2020		94		2,326		3		—		—		—			2,423
Charge for the year (refer note 35)		23		1,142		1		—		—		—			1,166
Amortisation capitalised during the year		15		—		—		—		—		—			15

As at 31 March 2021		132		3,468		4		—		—		—			3,604

Net book value
At 1 April 2019		96		25,547		34		—		11,381		6			37,064

At 31 March 2020		85		24,418		33		—		11,381		53			35,970

At 31 March 2021		140		24,580		32		7		11,596		55			36,410

Remaining life of customer contracts ranges from 17 to 23 years as on 31 March 2021 (31 March 2020: 18 to 24 years)

Mortgage and hypothecation on intangible assets:

Intangible assets are subject to a pari passu first charge to respective lenders for senior secured bonds, project term loans, buyer’s/supplier’s credit, working capital loan, debentures, senior secured notes and acceptances as disclosed in note 19 and note 27.

Impairment of goodwill and intangible assets under development:

Below is the

break-up

for goodwill and intangible assets under development for each group of cash generating units and individual cash generating units (CGU):


Group of CGU / individual CGU	31 March 2021		31 March 2020
Ostro Energy Group (wind power segment)
Goodwill		9,903		9,903

ReNew Vayu Urja (KCT) (wind power segment)
Goodwill		756		756

Prathamesh Solarfarms (solar power segment)
Goodwill		428		428

Others
Goodwill		510		294
Intangible asset under development		59		53

Intangible assets under development amounting to INR 20 as on 31 March 2021 (31 March 2020: INR Nil) out of the total intangible assets under development pertain to fair value of customer contracts for projects under development acquired as part of business combination. Goodwill and intangible assets under development pertain to various group of CGUs and individual CGUs and a combined test of impairment have been performed.

The Group undertook the impairment testing of Goodwill assigned to each Group of CGU and Individual CGU as at 31 March 2021 and 2020 applying value in use approach across all the Group CGUs and individual CGUs i.e. using cash flow projections based on financial budgets covering contracted power sale agreements with procurers (25 years) using a discount rate range of 10.90%

(pre-tax)

per annum for the impairment test as on 31 March 2021 (31 March 2020: 11.40%). The Group has used financial projections over the remaining life of the PPAs as the tariff rates are fixed as per PPA.

Based on the results of the Goodwill impairment test, the estimated value in use of each Group of CGU and individual CGU after adjusting the carrying values of property, plant and equipment’s and intangible assets was more than carrying value of Goodwill by INR 7,592 (31 March 2020: INR 6,515) and accordingly no impairment loss provision has been recognised in the statement of profit or loss.


Group of CGU / individual CGU	31 March 2021		31 March 2020
Ostro Energy Group (wind power segment)		3,090		4,106
ReNew Vayu Urja (KCT) (wind power segment)		2,727		1,628
Prathamesh Solarfarms (solar power segment)		1,775		586

The Management believes that any reasonably possible change in the key assumptions on which value in use is based would not cause the aggregate carrying amount of Goodwill to exceed the aggregate value in use of each Group of CGU and individual CGU.

The key assumptions used in the value in use calculations for each group of CGU and individual CGU unit are as follows:


(i) Discount rate: [Pre-tax Weighted Average Cost of Capital (WACC)]		10.90% per annum as on 31 March 2021 (31 March 2020: 11.40%) discount rate has been derived based on current cost of borrowing and equity rate of return based on the current market expectations.

(ii) Plant load factor (PLF)		Plant load factor for future periods are estimated for each group of CGU and individual CGU based on report from expert .

(iii) Collection of revenue as per PPA rate and GBI benefit in acquired projects located in Andhra Pradesh state will be realised as per the projections and would not be impacted by the ongoing legal proceedings because management believes that matter will be concluded in favour of Group as mentioned in note 51(a).

The assumptions explained above are consistent for each group of CGU and individual CGU to which Goodwill is allocated


Breakeven sensitivity:	31 March 2021	31 March 2020
Plant load factor (PLF)	If reduced by 7.41%	If reduced by 4.87%
Discount rate: (Pre-tax WACC)	11.89%	12.27%

Right of use assets

12 Months Ended

Mar. 31, 2021

Right of use assets

7	Right of use asset s


	Leasehold land			Building			Total
Cost
As at 1 April 2019		4,270			450			4,720
Additions during the year		460			50			510
Deletions during the year		(4	)		(3	)		(7	)

As at 31 March 2020		4,726			497			5,223
Acquisition of subsidiaries during the year		36			—			36
Additions during the year		1,443			25			1,468
Modifications during the year		—			(26	)		(26	)
Disposal of subsidiary during the year		(1,745	)		—			(1,745	)

As at 31 March 2021		4,460			496			4,956


Depreciation
As at 1 April 2019		177			96			273
Charge for the year		192			38			230
Depreciation capitalised during the year		—			65			65

As at 31 March 2020		369			199			568
Charge for the year		191			54			245
Depreciation capitalised during the year		—			54			54
Disposal of subsidiary during the year		(175	)		—			(175	)

As at 31 March 2021		385			307			692


Net book value

At 1 April 2019		4,093			354			4,447

As at 31 March 2020		4,357			298			4,655

As at 31 March 2021		4,075			189			4,264

Investment in jointly controlled entities

12 Months Ended

Mar. 31, 2021

Investment in jointly controlled entities

8	Investment in jointly controlled entities


	As at 31 March 2021		As at 31 March 2020
Investment in unquoted equity shares of entities under joint control at equity method (refer note 53)
Nil (31 March 2020: 3,498,744) equity shares of INR 10 each fully paid-up Aalok Solarfarms Limited		—		91
Nil (31 March 2020: 6,996,900) equity shares of INR10 each fully paid-up in Heramba Renewables Limited		—		170
Nil (31 March 2020: 3,498,744) equity shares of INR10 each fully paid-up in Abha Solarfarms Limited		—		89
Nil (31 March 2020: 6,997,494) equity shares of INR10 each fully paid-up in Shreyas Solarfarms Limited		—		174

Total		—		524

These entities have been acquired during the current year. Refer note 54 for details on business combination

Financial assets

12 Months Ended

Mar. 31, 2021

Financial assets

9	Financial assets


	As at 31 March 2021		As at 31 March 2020
Non current

Financial assets at FVTPL
Investment in unquoted compulsorily convertible debentures of entities under joint control
Nil (31 March 2020: 1,040,625) 10.7% unsecured compulsorily convertible debentures of INR 100 each fully paid of Abha Solarfarms Limited		—		104
Nil (31 March 2020: 2,081,250) 10.7% unsecured compulsorily convertible debentures of INR 100 each fully paid of Heramba Renewables Limited		—		208
Nil (31 March 2020: 1,040,625) 10.7% unsecured compulsorily convertible debentures of INR 100 each fully paid of Aalok Solarfarms Limited		—		104
Nil (31 March 2020: 2,081,070) 10.7% unsecured compulsorily convertible debentures of INR 100 each fully paid of Shreyas Solarfarms Limited		—		208

Total		—		624

These entities have been acquired during the current year. Refer note 54 for details on business combinatio


	As at 31 March 2021		As at 31 March 2020
Financial assets at amortised cost
Loans
Security deposits		140		126

Total		140		126


Others
Bank deposits with remaining maturity for more than twelve months (refer note 16)		2,999		142

Total		2,999		142


	As at 31 March 2021		As at 31 March 2020
Current
Financial assets at amortised cost
Loans
Security deposits		45		5
Loans to related parties (refer note 44)		11		5

Total		56		10


	As at 31 March 2021		As at 31 March 2020
Others
Recoverable from related parties (refer note 44)		—		15
Deferred consideration receivable (refer note 39)		1,936		—
Advances recoverable		154		233
Government grant receivable
- viability gap funding		302		387
- generation based incentive receivable		859		1,362
Interest accrued on fixed deposits		394		607
Others		52		114

Total		3,697		2,718

Loans and receivables are

non-derivative

financial assets which generate fixed interest income for the Group. The carrying value may be affected by changes in the credit risk of the counterparties

Trade receivables

12 Months Ended

Mar. 31, 2021

Trade receivables

10	Trade receivables


	As at 31 March 2021		As at 31 March 2020
Non-current
Trade receivables		1,178		—

		1,178		—
Less: impairment allowances for bad and doubtful debts		—		—

		1,178		—

Non-current

trade receivables represent amounts receivable that is unconditional, recognised pursuant to approval of cost

over-run

by the customer (refer note 30(c)) and are expected to be received over a period of 13—25 years. These trade receivables carry an interest rate in the range of 8.25%—10.41% per annum. As these amounts are not due within next twelve months from the end of the reporting date, they are disclosed as

non-current.

Trade receivable of INR 236 expected to be realised within twelve months from the end of the reporting date are included in current trade receivables.


	As at 31 March 2021			As at 31 March 2020
Current
Trade receivables (refer notes 44 and 51)		35,364			26,090

		35,364			26,090
Less: impairment allowances for bad and doubtful debts		(562	)		(176	)

Total		34,802			25,914

Trade receivables other than the current portion of

non

-current

trade receivable explained above are

non-interest

bearing and are generally on terms of

7-60

days

Set out below is the movement in the allowance for expected credit losses of trade receivables:


	Impairment allowance
As at 1 April 2019		106
Provision for expected credit losses for the year		70

As at 31 March 2020		176
Provision for expected credit losses for the year		386

As at 31 March 2021		562

Deferred tax assets (DTA) / deferred tax liabilities (DTL) (net)

12 Months Ended

Mar. 31, 2021

Deferred tax assets (DTA) / deferred tax liabilities (DTL) (net)

11	Deferred tax assets (DTA) / deferred tax liabilities (DTL) (net)

11A	Deferred tax assets (net)


	As at 31 March 2021		As at 31 March 2020
Deferred tax assets (gross)
Compound financial instruments		31		140
Loss on mark to market of derivative instruments		222		7
Difference in written down value as per books of account and tax laws		1		1
Provision for decommissioning cost		1,246		1,030
Expected credit loss		54		18
Losses available for offsetting against future taxable income		15,173		12,430
Unused tax credit (MAT)		106		563
Provision for operation and maintenance equalisation		284		224
Lease liabilities		149		284
Financial guarantee contracts		24		—
Government grant (viability gap funding)		28		33
Others		97		66

Deferred tax assets (gross) - total (a)		17,415		14,796
Deferred tax liabilities (gross)
Compound financial instruments		6		5
Gain on mark to market of derivative instruments		81		1,074
Difference in written down value as per books of account and tax laws		15,407		11,773
Unamortised ancillary borrowing cost		169		226
Right of use asset		129		253
Government grant (viability gap funding)		11		—
Others		1		—

Deferred tax liabilities (gross) - total (b)		15,804		13,331

Deferred tax assets (net) (a) - (b)		1,611		1,465

11B	Deferred tax liabilities (net)


	As at 31 March 2021		As at 31 March 2020
Deferred tax liabilities (gross)
Gain on mark to market of derivative instruments		54		765
Difference in written down value as per books of account and tax laws		33,930		28,498
Unamortised ancillary borrowing cost		162		119
Right of use asset		52		68
Fair value gain on financial instruments		0		10
Others		24		24

Deferred tax liabilities (gross) - total (c)		34,222		29,484
Deferred tax assets (gross)
Compound financial instruments		107		0
Loss on mark to market of derivative instruments		143		158
Unamortised ancillary borrowing cost		5		6
Provision for decommissioning cost		2,330		2,085
Expected credit loss		96		27
Losses available for offsetting against future taxable income		18,843		15,668
Unused tax credit (MAT)		1,248		695
Provision for operation and maintenance equalisation		411		410
Lease liabilities		61		57
Government grant (viability gap funding)		164		211
Other s		6		1

Deferred tax assets (gross) - total (d)		23,414		19,318

Deferred tax liabilities (net) (c) - (d)		10,808		10,166

11C	Reconciliation of tax expense and the accounting profit multiplied by tax rate


	For the year ended
	31 March 2021			31 March 2020			31 March 2019
Accounting profit before income tax		(5,128	)		(623	)		4,935
Tax at the India’s tax rate of 31.2% applicable to the Parent (31 March 2020: 31.2%, 31 March 2019: 31.2%)		(1,600	)		(194	)		1,540
Disallowance under section 94B of the Income Tax Act		1,333			1,328			1,131
Compensation for loss of revenue		—			—			(65	)
Interest on compound financial instrument		1,091			634			30
Tax rate differences		15			(96	)		(308	)
Changes in estimates on reasonable certainty for recoverability of tax losses		2,305			(1,426	)		330
Change in estimates for recoverability of unused tax credits (MAT)		82			316			—
Adjustment of tax relating to earlier periods		174			291			(64	)
On account of adoption of new tax ordinance
- Mat credit written off		48			938			—
- Recognition / reversal of deferred tax asset / deferred tax liability		(7	)		83			—
Effect of tax holidays and other tax exemptions		(879	)		271			(662	)
Deferred tax asset written off on sale of subsidiary (refer note 39)		306			—			—
Reinstatement loss on loan having income taxable under income from other sources		—			74			—
Other non-deductible expenses		36			(61	)		(131	)

At the effective income tax rate		2,904			2,158			1,801

Current tax expense reported in the statement of profit or loss		785			486			1,186
Deferred tax expense reported in the statement of profit or loss		2,091			1,714			634
Adjustment of current tax relating to earlier years		28			(42	)		(19	)

		2,904			2,158			1,801

11D

Reconciliation

of deferred tax assets and deferred tax liabilities (net):

a) For the year ended 31 March 2021


Particulars	Opening balance DTA / (DTL) as at 1 April 2020			Income / (expense) recognised in profit or loss			Income / (expense) recognised in OCI			Income / (expense) recognised in equity		Income / (expense) recognised in profit or loss on sale of subsidiary			Addition through business combination			Closing balance DTA / (DTL) as at 31 March 2021
Compound financial instruments		138			(84	)		—			—		80			—			134
Gain / (loss) on mark to market of derivative instruments		(1,671	)		(7	)		1,905			—		—			—			227
Difference in written down value as per books of account and tax laws		(40,272	)		(8,782	)		—			—		366			(649	)		(49,337	)
Unamortised ancillary borrowing cost		(339	)		19			—			—		—			(5	)		(325	)
Provision for decommissioning cost		3,115			482			—			—		(26	)		4			3,575
Expected credit loss		44			105			—			—		(1	)		—			148
Fair value gain on financial instruments		(9	)		(8	)		—			—		17			—			0
Losses available for offsetting against future taxable income		28,098			6,304			(339	)		—		(719	)		675			34,019
Unused tax credit (MAT)		1,258			95			—			—		—			—			1,353
Provision for operation and maintenance equalisation		633			60			—			—		—			2			695
Lease liabilities		342			21			—			—		(157	)		4			210
Financial guarantee contracts		—			24			—			—		—			—			24
Government grant (viability gap funding)		244			(63	)		—			—		—			—			181
Right of use asset		(321	)		11			—			—		133			(4	)		(181	)
Others		39			39			1			—		—			1			80

		(8,701	)		(1,784	)		1,567			—		(307	)		28			(9,197	)

b) For the year ended 31 March 2020


Particulars	Opening balance DTA / (DTL) as at 1 April 2020			Income / (expense) recognised in profit or loss			Income / (expense) recognised in OCI			Income / (expense) recognised in equity			Income / (expense) recognised in profit or loss on sale of subsidiary		Addition through business combination		Closing balance DTA / (DTL) as at 31 March 2021
Compound financial instruments		172			(2	)		—			(32	)		—		—		138
Gain / (loss) on mark to market of derivative instruments		185			0			(1,856	)		—			—		—		(1,671	)
Difference in written down value as per books of account and tax laws		(34,254	)		(6,018	)		—			—			—		—		(40,272	)
Unamortised ancillary borrowing cost		(225	)		(114	)		—			—			—		—		(339	)
Provision for decommissioning cost		2,738			377			—			—			—		—		3,115
Expected credit loss		27			17			—			—			—		—		44
Fair value gain on financial instruments		0			(9	)		—			—			—		—		(9	)
Losses available for offsetting against future taxable income		23,038			5,060			—			—			—		—		28,098
Unused tax credit (MAT)		2,465			(1,207	)		—			—			—		—		1,258
Provision for operation and maintenance equalisation		454			179			—			—			—		—		633
Lease liabilities		352			(10	)		—			—			—		—		342
Government grant (viability gap funding)		255			(11	)		—			—			—		—		244
Right of use asset		(322	)		1			—			—			—		—		(321	)
Option premium		(31	)		31			—			—			—		—		—
Others		43			(8	)		4			—			—		—		39

		(5,103	)		(1,714	)		(1,852	)		(32	)		—		—		(8,701	)

c) For the year ended 31 March 2019


Particulars	Opening balance DTA / (DTL) as at 1 April 2018			Income / (expense) recognised in profit or loss			Income / (expense) recognised in OCI			Income / (expense) recognised in equity		Income / (expense) recognised in profit or loss on sale of subsidiary		Addition through business combination		Closing balance DTA / (DTL) as at 31 March 2019
Compound financial instruments		158			14			—			—		—		—		172
Gain / (loss) on mark to market of derivative instruments		93			—			92			—		—		—		185
Difference in written down value as per books of account and tax laws		(21,644	)		(12,721	)		—			—		—		111		(34,254	)
Unamortised ancillary borrowing cost		(218	)		(7	)		—			—		—		—		(225	)
Security deposit		41			(41	)		—			—		—		—		—
Provision for decommissioning cost		1,819			919			—			—		—		—		2,738
Expected credit loss		11			16			—			—		—		—		27
Fair value gain on financial instruments		(188	)		188			—			—		—		—		0
Losses available for offsetting against future taxable income		13,549			9,489			—			—		—		—		23,038
Unused tax credit (MAT)		1,244			1,221			—			—		—		—		2,465
Provision for operation and maintenance equalisation		432			22			—			—		—		—		454
Lease liabilities		150			202			—			—		—		—		352
Government grant (viability gap funding)		—			255			—			—		—		—		255
Right of use asset		(138	)		(184	)		—			—		—		—		(322	)
Option premium		—			(31	)		—			—		—		—		(31	)
Others		23			24			(4	)		—		—		—		43

		(4,668	)		(634	)		88			—		—		111		(5,103	)

The Group has

unabsorbed

depreciation and tax losses

which

arose in

India

of INR 140,086 (31 March 2020: INR 110,796). The unabsorbed depreciation and tax losses will be available for offsetting against future taxable profits of the Group.

Out of this, the tax losses that are available for offsetting from five to eight years against future taxable profits of the companies in which the losses arose are INR 10,854 (31 March 2020: INR 3,606). The unabsorbed depreciation that will be available for offsetting for against future taxable profits of the companies in which the losses arose are of INR 129,232 (31 March 2020: INR 107,074). Unabsorbed depreciation is available for utilisation indefinitely.

The Group has recognised deferred tax asset of INR 34,016 (31 March 2020: INR 28,096) utilisation of which is dependent on future taxable profits. The future taxable profits are based on projections made by the management considering the PPA with power procurer.

The expiry year of MAT credit is 8 to 15 years from the date of entitlement and deferred tax has been recognised on MAT credit which are expected to be utilised before the expiry year.

The Group has tax losses amounting to INR 7,586 (31 March 2020: INR 2,092) having an expiry period of 5 to 8 years, capital losses amounting to INR 828 (31 March 2020: INR Nil) having an expiry period of 4 years, unabsorbed depreciation amounting to INR 1,535 (31 March 2020: INR 1,970) which are available for utilisation indefinitely and MAT credit amounting to INR 82 (31 March 2020: INR 323) having an expiry period of 15 years on which deferred tax assets have not been recognised as there may not be sufficient taxable profits to offset these losses. Further, disallowance under section 94B of the Income Tax Act, 1961 is considered as a permanent difference and accordingly, deferred tax asset has not been recognised on such disallowance.

Certain subsidiaries of the Group have undistributed earnings INR 15,783 as at 31 March 2021 (31 March 2020: INR 7,746) which, if paid out as dividends, would be subject to tax in the hands of recipient. An assessable temporary difference exists, but no deferred tax liability has been recognised as the Parent is able to control timing of distributions from these subsidiaries. These subsidiaries are not expected to distribute these profits in the foreseeable future.

Prepayments

12 Months Ended

Mar. 31, 2021

Prepayments

12	Prepayment s


	As at 31 March 2021		As at 31 March 2020
Non-current
Prepaid expenses		679		1,205

Total		679		1,205

Current
Prepaid expenses		592		849

		592		849

Other Assets

12 Months Ended

Mar. 31, 2021

Other assets

13	Other assets


	As at 31 March 2021		As at 31 March 2020
Non-current
Capital advance		7,497		5,460
Advances recoverable		142		95
Security deposits		8		8
Balances with government authorities		68		99

Total		7,715		5,662

Current
Advances recoverable (refer note 51)		1,553		1,061
Balances with government authorities		825		722
Contract asset (refer note 30(e))		86		25

Tota l		2,464		1,808

Inventories

12 Months Ended

Mar. 31, 2021

Inventories

14	Inventorie s


	As at 31 March 2021		As at 31 March 2020
Consumables and spares		833		609

Total		833		609

Derivative instruments

12 Months Ended

Mar. 31, 2021

Derivative instruments

15	Derivative instruments


	As at 31 March 2021		As at 31 March 2020
Financial assets at FVTOCI - cash flow hedges
Derivative instruments		2,691		8,718

Total		2,691		8,718

The decrease during the current year in derivative instruments on cash flow hedges is due to fluctuations in foreign currencies and floating interest rates

Cash and bank balances

12 Months Ended

Mar. 31, 2021

Disclosure of cash and cash equivalents

16	Cash and bank balances


	As at 31 March 2021		As at 31 March 2020
Cash and cash equivalents
Cash and cheque on hand		0		0

Balance with banks
- On current accounts		19,474		11,699
- Deposits with original maturity of less than 3 months #		1,205		1,390

		20,679		13,089


	As at 31 March 2021			As at 31 March 2020
Bank balances other than cash and cash equivalents
Deposits with
- Remaining maturity of less than twelve months #		26,506			31,203
- Remaining maturity of more than twelve months #		2,999			142

		29,505			31,345
Less: amount disclosed under financial assets (others) (refer note 9)		(2,999	)		(142	)

Total		26,506			31,203

Fixed deposits of INR 14,037 (31 March 2020: INR 8,282) are under lien with various banks for the purpose of Debt Service Reserve Account and as margin money for the purpose of letter of credit / bank guarantee.

The bank deposits have an original maturity period of 7 days to 3,652 days and carry an interest rate of 2% - 8.66% which is receivable on maturity

Share capital

12 Months Ended

Mar. 31, 2021

Share capital

17	Share capital


Authorised share capital	Number of shares		Amount
Equity shares of INR 10 each
As at 1 April 2019		500,000,000		5,000
Increase during the year		—		—

As at 31 March 2020		500,000,000		5,000
Increase during the year		—		—

As at 31 March 2021		500,000,000		5,000


Compulsory convertible preference shares of INR 425 each (refer note 19)	Number of shares		Amount
As at 1 April 2019		—		—
Increase during the year		60,000,000		25,500

As at 31 March 2020		60,000,000		25,500
Increase during the year		—		—

As at 31 March 2021		60,000,000		25,500


Issued share capital		Number of shares		Amount

17A	Equity shares of INR 10 each issued, subscribed and fully paid up


As at 1 April 2019	379,924,556	3,799
Shares issued during the year	—	—

As at 31 March 2020	379,924,556	3,799
Shares issued during the year	—	—

As at 31 March 2021	379,924,454	3,799

Terms / rights attached to equity shares

The Group has only one class of equity shares having par value of INR 10 per share. Each holder of equity shares is entitled to one vote per share. If declared, the Group will declare and pay dividends in Indian rupees. In the event of liquidation of a Group, the holders of equity shares of such Group will be entitled to receive remaining assets of the Group, after distribution of all preferential amounts. The distribution will be in proportion to the number of equity shares held by the shareholders of the Group.

The equity shares are redeemable at the option of the holders and, therefore, are considered a puttable instrument in accordance with IAS 32. Puttable instruments are required to be accounted for as financial liabilities, except where certain conditions are met in accordance with IAS 32, in which case, the puttable instruments may be presented as equity. The equity shares meet the conditions of IAS 32 and are, therefore, classified and accounted for as equity. The terms of the equity shares shall be amended pursuant to the completion of the Business Combination event as disclosed in note 58

Other equity

12 Months Ended

Mar. 31, 2021

Other equity

18	Other equity

18A	Share premium


As at 1 April 2019			67,165

As at 31 March 2020			67,165

As at 31 March 2021			67,165

Nature and purpose

Securities premium reserve is used to record the premium on issue of shares. The reserve can be utilised only for limited purposes such as issuance of bonus shares in accordance with the provisions of the Companies Act, 2013.

18B	Hedge reserve


As at 1 April 2019	(512	)
OCI for the year (refer note 52)	(636	)
Attributable to non-controlling interests (refer note 52)	62

As at 31 March 2020	(1,086	)
OCI for the year (refer note 52)	(4,072	)
Attributable to non-controlling interests (refer note 52)	(66	)

As at 31 March 2021	(5,224	)

Nature and purpose

The Group uses hedging instruments as part of its management of foreign currency risk and interest rate risk associated on borrowings. For hedging foreign currency and interest rate risk, the Group uses foreign currency forward contracts, cross currency swaps (CCS), call spreads, foreign currency option contracts and interest rate swaps (IRS). To the extent these hedges are effective, the change in fair value of the hedging instrument is recognised in the cash flow hedging reserve. Amounts recognised in the cash flow hedging reserve is reclassified to the statement of profit or loss when the hedged item affects profit or loss (example: interest payments).

18C	Share based payment reserve


As at 1 April 2019	1,086
Expense for the year	207
Forfeiture of vested options	(132	)

As at 31 March 2020	1,161
Expense for the year	177
Repurchase of vested stock options	(176	)
Forfeiture of vested options	3

As at 31 March 2021	1,165

Nature and purpose

The share options based payment reserve is used to recognise the grant date fair value of options issued to employees under employee stock option plan.

18D	Retained earnings / (losses)


As at 1 April 2019	1,894
Loss for the year	(2,696	)
Re-measurement loss on defined benefit plans (net of tax)	(9	)
Adjustment due to forfeiture of vested options	132
Acquisition of interest by NCI in subsidiaries	5
Debenture redemption reserve created during the year	(33	)
Debenture redemption reserve released on account of repayment of debentures	1,914

As at 31 March 2020	1,207
Loss for the year	(7,818	)
Re-measurement loss on defined benefit plans (net of tax)	(7	)
Forfeiture of vested options	(3	)
Acquisition of interest by NCI in subsidiaries	29
Repurchase of vested stock options	(470	)
Debenture redemption reserve created during the year	(117	)
Debenture redemption reserve released on account of repayment of debentures	811
Others*	(121	)

As at 31 March 2021	(6,489	)

represents distribution to owner recognised for financial guarantees (refer note 44)

Nature and purpose

Retained earnings are the profits/(loss) that the Group has earned/incurred till date, less any transfers to general reserve, dividends or other distributions paid to shareholders. It is a free reserve available to the Group and eligible for distribution to shareholders, in case where it is having positive balance representing net earnings till date.

18E	Other components of equity


At 31 March 2019*			4,289
At 31 March 2020*			2,279
At 31 March 2021*			1,661

Represents capital reserve, debenture redemption reserve and foreign currency translation reserve as explained below.

(i)	Capital reserve


As at 1 April 2019	114
Amount utilised on acquisition of non-controlling interest	(143	)

As at 31 March 2020	(29	)
Gain on acquisition of non-controlling interest	78

As at 31 March 2021	49

Nature and purpose

Capital reserve represents bargain purchase gain on business combinations recognised under Local GAAP prior to date of transition to IFRS. It also includes adjustments pertaining to acquisition of NCI interests by the Group.

(ii)	Debenture redemption reserve


As at 1 April 2019	4,177
Debenture redemption reserve created during the year*	33
Amount transferred to retained earnings during the year	(1,914	)

As at 31 March 2020	2,296
Debenture redemption reserve created during the year*	117
Debenture redemption reserve transferred to retained earnings during the year	(811	)

As at 31 March 2021	1,602

Nature and purpose

As per the Companies Act, Debenture Redemption Reserve (DRR) is a reserve required to be maintained by the Companies that have issued debentures. The purpose of this reserve is to minimise the risk of default on repayment of debentures as this reserve ensures availability of funds for meeting obligations towards debenture-holders. As per amendments in Companies (Share capital and Debentures) Rules, 2014 the requirement of listed Companies to create Debenture redemption reserve has been removed.

Due to insufficient profit during the year, Debenture redemption reserve in respect of

un-listed

entities has been created only to the extent of available profit. Resultantly, there is an overall shortfall as at 31 March 2021: INR 663 (31 March 2020: INR 216).

(iii)

Foreign currency translation reserve


As at 1 April 2019	(2	)
Exchange differences on translation of foreign operations	14

As at 31 March 2020	12
Exchange differences on translation of foreign operations	(2	)

At 31 March 2021	10

Nature and purpose

Exchange differences arising on translation of the foreign operations are recognised in other comprehensive income as described in accounting policy and accumulated in a separate reserve within equity. The cumulative amount is reclassified to profit or loss when the foreign operation is

disposed-off

Interest-bearing loans and borrowings

12 Months Ended

Mar. 31, 2021

Interest-bearing loans and borrowings

19	Interest-bearing loans and borrowings


	Non-current								Current
	Notes		Nominal interest rate %	Maturity	As at 31 March 2021		As at 31 March 2020		As at 31 March 2021			As at 31 March 2020
Debentures
- Non convertible debentures (secured)		(i)	6.03% - 12.50%	March 2022 - September 2034		90,137		38,835		10,447			6,376
- Compulsorily convertible debentures (unsecured)		(ii)	8% - 10.70%	June 2026 - September 2036		809		553		—			—
Term loan from bank (secured)		(iii)	8.21% - 11.75%	December 2021 - December 2038		44,269		40,258		6,888			13,666
Term loan from financial institutions (secured)		(iv)	8.67% - 12.10%	September 2030 - March 2041		80,300		89,604		13,119			2,884
Senior secured notes		(v)	6.06% - 10.74%	September 2022 - February 2027		92,924		128,160		—			—
Compulsorily convertible preference shares		(vi)	15.02%	June 2022		26,697		23,200		—			—

Interest-bearing loans and borrowings - total #						335,136		320,610		30,454			22,926

Amount disclosed under the head ‘other current financial liabilities’ (refer note 21)						—		—		(30,454	)		(22,926	)

Interest-bearing loans and borrowings - net						335,136		320,610		—			—

Certain borrowings included above are guaranteed by the Parent on behalf of the group entities. Further, certain securities held in subsidiary companies are pledged with banks and financial institutions as security for financial facilities obtained by subsidiary companies.

Notes:

(a) Details of terms and security

(i) Non convertible debentures (secured)

The debentures are secured by way of first pari passu charge on the respective Company’s immovable properties, movable assets, current assets, cash accruals including but not limited to current assets, receivables, book debts, cash and bank balances, loans and advances etc. present and future.

(ii) Compulsorily convertible debentures (unsecured) Terms of conversion of CCDs


Entity	Tenure (years)		Total proceeds		Maturity date	Interest coupon rate		Moratorium period
ReNew Mega Solar Private Limited*		25		193	22 August 2036 and 20 September 2036		8%	18 months from the date of issue
ReNew Solar Energy (Telangana) Private Limited*		20		620	20 September 2036		8%	18 months from the date of issue
Abha Solarfarms Limited		10		35	6 June 2026, 26 January 2027 and 24 May 2027		10.70%	24 months from the date of issue
Aalok Solarfarms Limited		10		35	6 June 2026, 26 January 2027 and 24 May 2027		10.70%	24 months from the date of issue
Shreyas Solarfarms Limited		10		69	8 June 2026 and 26 January 2027		10.70%	24 months from the date of issue
Heramba Renewables Limited		10		69	26 January 2027 and 24 May 2027		10.70%	24 months from the date of issue

Total				1,021

Compulsorily convertible debentures are compulsorily convertible into equity shares in accordance with the terms of the Joint Venture Agreement at conversion ratio of

1:1

. CCD do not carry any voting rights. Liability component of Compulsorily convertible debentures represent the present value of interest coupon.

(iii) Term loan from banks (secured)

Secured by pari passu first charge by way of mortgage of all the present and future immovable properties, hypothecation of movable assets, book debt, operating cash flows, receivables, commissions, revenue of whatsoever nature, all bank accounts and assignment of all rights, title, interests, benefits, claims etc. of project documents and insurance contracts of the respective Company. These loans usually have repayment cycle of monthly / quarterly payments.

For all long-term loan arrangements from banks, the Group has complied with the debt covenants except for a long-term loan arrangement amounting to INR 3,895 as at 31 March 2021 (31 March 2020: INR 2,916), where the Group could not meet covenants with the effect that the liability became payable on demand. The Group has classified these liabilities as current. Further, for such borrowings outstanding as at 31 March 2021, the Group has applied for waiver amounting to INR 3,664 (31 March 2020: the Group had subsequently received waiver for INR 2,916 from the lenders and the balances were fully repaid in November 2020).

(iv) Term loan from financial institutions (secured)

Secured by a first pari passu charge by way of mortgage on immovable properties, first pari passu charge by way of hypothecation of tangible moveable assets, first charge on all the current assets and accounts. Further secured by way of assignment of all the rights, title, interest, benefit, claims and demands under all the project agreements, letter of credit, insurance contracts and proceeds, guarantees, performance bond etc. of the respective company. These loans usually have repayment cycle of monthly / quarterly payments.

For all long-term loan arrangements from financial institutions, the Group has complied with the debt covenants except for a long-term loan arrangement amounting to INR 6,446 as at 31 March 2021 (31 March 2020: INR Nil), where the Group could not meet covenants with the effect that the liability became payable on demand. The Group has classified these liabilities as current. Further, for the such borrowings outstanding as at 31 March 2021, the Group has subsequently received waiver from the lenders in April 2021.

Non creation of charge on securities against outstanding loans

Entities forming part of the Group have not created charge on security against outstanding loan balances as on 31 March 2021 mainly on account of pending approvals from government agencies with respect to land mortgages. The charge will be created as and when the respective entities get the necessary approvals from these agencies. In any of the entities stated below,

non-creation

of charge does not result in any breach of material provisions (event of default). Further, none of the following entities listed below have received any approval till date.


Entity name	Lender name	Amount
ReNew Solar Energy (Rajasthan) Private Limited	Power Finance Corporation Limited		3,025
Prathamesh Solarfarms Limited	Yes Bank *		1,522
Prathamesh Solarfarms Limited	Rural Electrification Corporation *		1,724
ReNew Solar Power Private Limited	Indian Renewable Energy Development		5,513
Ostro Jaisalmer Private Limited	Rural Electrification Corporation *		778
Ostro Urja Wind Private Limited	Rural Electrification Corporation *		2,165
Ostro Dakshin Power Private Limited	Ptc Financial Services Pvt. Ltd.		1,236
Ostro Dakshin Power Private Limited	Rural Electrification Corporation		3,803
Ostro Andhra Wind Private Limited	India Infrastructure Finance Co. Ltd		1,373
Ostro AP Wind Private Limited	India Infrastructure Finance Co. Ltd		1,404
Ostro Madhya Wind Private Limited	Rural Electrification Corporation *		2,143
Badoni Power Private Limited	Rural Electrification Corporation *		852
AVP Powerinfra Private Limited	Rural Electrification Corporation *		795
Ostro Anantapur Private Limited	Rural Electrification Corporation *		3,344
ReNew Wind Energy (Varekarwadi) Private Limited	Rural Electrification Corporation *		2,172

The corresponding loan balances have been fully repaid subsequent to the reporting date.

(v) Listed senior secured notes

Notes are secured by way of exclusive mortgage over immovable properties and exclusive charge by way of hypothecation of tangible and intangible movable assets. Further secured by way of hypothecation over rights and benefit, claims and demands under all the project agreements, letter of credit, insurance contracts and proceeds, guarantees, performance bond etc. of the company. Secondary charge over the account receivables, book debts and cash flows. The senior secured notes shall be repaid through bullet payments starting from September 2022 to February 2027.

(vi) Compulsorily convertible preference shares

The Company has issued INR 20,903 Compulsory Convertible Preference Shares (‘CCPS’) - Series A to certain existing shareholders:


Name of allottee	Number of shares allotted		Face value		Amount received		Balance as at 31 March 2021
GS Wyvern Holding Limited		16,395,294		425		6,968		8,899
Green Rock B 2014 Limited (acting in its capacity as		16,318,729		425		6,935		8,858
trustee of Green Stone A 2014 Trust)
Canada Pension Plan Investment Board		16,470,588		425		7,000		8,940

Total		49,184,611				20,903		26,697

Each Series A CCPS are

non-cumulative

and shall be entitled to a preferred rate of dividend of 0.0001% over the equity shares of the Company. These are mandatorily convertible upon the occurrence of the earliest of certain events as enumerated in terms specified in board resolution passed for issuance of CCPS but no later than 3 years from the date of allotment. Conversion shall occur at conversion price which will be computed in the manner as terms specified in board resolution passed for issuance of CCPS on the date of conversion. Series A CCPS do not meet the criteria of conversion into fixed number of equity shares given conversion price is not currently ascertainable, accordingly these CCPS have been recorded as financial liability and carried at amortised cost. These CCPS carry a yield of 15.02%.

The terms of conversion of CCPS include cap and floor prices for the computation of conversion ratio of the CCPS. These are considered as embedded derivatives and are accounted a FVTPL. The fair value of these embedded derivatives were Nil as on 31 March 2021 (31 March 2020: Nil)

(b) Loan moratorium

(i) Entities forming part of the group have also applied for moratorium from financial institutions under “Reserve Bank of India’s COVID 19 – Regulatory Package dated 27 March 2020”. The details are as follows:

Moratorium
availed for

Company Name

Lender

Principal

Interest

Original
due date

Extended
due date

Settlement terms

Ostro Andhra Wind Private Limited

Indian Renewable Energy Development Agency Limited

30 June 2020

30 September 2020

As per the intimation received from the Lender dated 17 November 2020, Principle instalment outstanding for the quarter ended 30 June 2020 and interest outstanding for the month of June 2020 shall be deferred to 30 September 2033.

Ostro Andhra Wind Private Limited

India Infrastructure Finance Corporation

30 June 2020

30 September 2020

As per the intimation received from the Lender dated 24 December 2020, Principle instalment outstanding for the quarter ended 30 June 2020 and interest outstanding for the month of June 2020 shall be deferred to last instalment in 1 July 2035.

Ostro Andhra Wind Private Limited

Tata Cleantech Capital Limited

30 June 2020

30 September 2020

As per the intimation received from the Lender dated 11 January 2021, Principle instalment along with interest outstanding for the quarter ended 30 June 2020 shall be deferred and the original repayment schedule shall be extended by 3 months resulting in extending last payment date as per repayment schedule from 30 June 2033 to 30 September 2033.

Ostro AP Wind Private Limited

Indian Renewable Energy Development Agency Limited

30 June 2020

30 September 2020

Ostro AP Wind Private Limited

India Infrastructure Finance Corporation

30 June 2020

30 September 2020

Ostro AP Wind Private Limited

Tata Cleantech Capital Limited

30 June 2020

30 September 2020

ReNew Solar Energy (Rajasthan) Private Limited

Power Finance Corporation Limited

—

15 April 2020

—

As intimated by the Lender vide letter dated 25 February 2021, the repayment date has been revised resulting in extending last payment date as per repayment schedule. Previously, the repayment date was 15 December 2038 which has now been revised to 15 February 2039 to 15 June 2039 and the deferred amount has been converted to additional loan.

ReNew Solar Energy (Rajasthan) Private Limited

Power Finance Corporation Limited

—

15 May 2020

—

ReNew Solar Energy (Rajasthan) Private Limited

Power Finance Corporation Limited

—

15 June 2020

—

ReNew Solar Energy (Rajasthan) Private Limited

Power Finance Corporation Limited

—

15 July 2020

—

ReNew Solar Energy (Rajasthan) Private Limited

Power Finance Corporation Limited

—

15 August 2020

—

(ii) Zemira Renewables Private Limited (referred to as “Zemira”) had an outstanding term loan balance of INR 3,047 from Piramal Capital & Housing Finance Limited (INR 2,149) and PHL FINVEST Private Limited (INR 898) (collectively referred to as “Piramal”) as at 31 March 2020. As per terms of agreement with Piramal, principal instalment of INR 29 and interest of INR 33 was due on 30 June 2020 against which Zemira has availed moratorium from the Piramal till 30 September 2020 through approval letters dated 28 July 2020 under “Reserve Bank of India’s COVID 19—Regulatory Package dated 27 March 2020”. On 23 September 2020, Zemira issued 14.45% redeemable

non-convertible

debentures amounting to INR 3,075 to India Investment Opportunities Fund. On 24 September 2020, the outstanding balance for existing term loan increased to INR 3,178 (with accrual of interest till such date) and the proceeds from

non-convertible

debentures have been utilised to partially repay the term loan balance to an extent of INR 3,075. On 2 November 2020, the remaining amount of INR 103.37 (including accrual of interest till such date) has been repaid

(iii) During the year ended 31 March 2021, the Group has availed moratorium on the following loans for a period of 90 days, which have been repaid:


Company Name	Lender	Moratorium availed on				Original due date
Company Name	Lender	Principal		Interest		Original due date
Ostro Mahawind Power Private Limited	Barclays Bank Plc.		4,165		—		31 May 2020
Vivasvat Solar Energy Private Limited	Indian Renewable Energy Development Association		—		5		30 April 2020
			—		5		31 May 2020
			—		5		30 June 2020
ReNew Solar Power Private Limited			—		5		30 June 2020
			—		5		31 July 2020
			—		5		30 April 2020
			—		5		31 May 2020
ReNew Wind Energy (Varekarwadi) Private Limited	PTC Financial Services		—		5		1 July 2020
ReNew Wind Energy (Varekarwadi) Private Limited	PTC Financial Services		—		5		1 August 2020

(c) The Group during the year has prepaid borrowings arrangements including loan from banks, loans from financial institutions and non convertible debentures amounting to INR 41,362. These arrangements have been subsequently refinanced in May 2021.


Listing status	Debenture Series	Face value per NCD (INR)		Numbers of NCDs outstanding				Outstanding amount						Nominal interest	Earliest redemption date		Last date of repayment		Terms of repayment
Listing status	Debenture Series	Face value per NCD (INR)		As at 31 March 2021		As at 31 March 2020		As at 31 March 2021			As at 31 March 2020			Nominal interest	Earliest redemption date		Last date of repayment		Terms of repayment
Non listed	Not applicable		1,000,000		1,026		1,133		1,026			1,133		9.41%		30-Jun-20		30-Sep-30		Quarterly
Non listed	Not applicable		1,000,000		4,966		5,222		4,966			5,222		9.60%		30-Jun-20		31-Mar-23		Quarterly
Non listed	Series 1		1,000,000		1,778		1,850		1,778			1,850		9.60%-9.95%		30-Jun-20		31-Mar-23		Quarterly
Non listed	Series 2		1,000,000		3,071		3,236		3,071			3,236		9.60%-9.95%		30-Jun-20		31-Mar-23		Quarterly
Non listed	Not applicable		1,000,000		2,844		2,955		2,844			2,955		9.95%		30-Jun-20		31-Mar-23		Quarterly
Listed	Not applicable		1,000,000		3,370		3,660		3,370			3,660		9.75%		30-Sep-20		31-Mar-33		Half yearly
Listed	Series-1		1,000,000		474		500		474			500		8.55%		30-Sep-20		30-Sep-34		Half yearly
Listed	Series-2		1,000,000		2,161		2,278		2,161			2,278		8.65%		30-Sep-20		30-Sep-34		Half yearly
Listed	Series-3		1,000,000		3,867		4,075		3,867			4,075		8.75%		30-Sep-20		30-Sep-34		Half yearly
Non listed	Not applicable		1,000,000		—		5,040		—			5,040		14.85%		31-May-21		15-Nov-25		Quarterly
Non listed	Not applicable		1,000,000		2,000		2,000		2,000			2,000		12.50%		27-Oct-22		27-Oct-22		Bullet
Listed	Not applicable		1,000,000		—		5,060		—			5,060		12.68%		26-Feb-21		26-Feb-21		Bullet
Non listed	Not applicable		1,000,000		2,000		2,000		2,000			2,000		11.96%		28-Sep-22		28-Sep-22		Bullet
Non listed	Not applicable		1,000,000		—		2,000		—			2,000		12.41%		31-Oct-22		31-Oct-22		Bullet
Non listed	Not applicable		1,000,000		—		1,210		—			1,210		9.18%		30-Nov-22		30-Nov-22		Bullet
Non listed	Not applicable		1,000,000		3,210		3,210		3,210			3,210		9.45%		30-Jul-25		30-Jul-25		Bullet
Non listed	Not applicable		1,000,000		3,738		—		3,738			—		8.55%		31-Aug-22		31-Aug-22		Bullet
Non listed	Not applicable		1,000,000		9,000		—		9,000			—		9.25%		30-Mar-22		30-Mar-22		Bullet
Non listed	Not applicable		1,000,000		5,159		—		5,159			—		8.46%		28-Apr-24		28-Apr-24		Bullet
Non listed	Not applicable		1,000,000		1,747		—		1,747			—		8.46%		28-Apr-24		28-Apr-24		Bullet
Non listed	Not applicable		1,000,000		1,674		—		1,674			—		8.46%		28-Apr-24		28-Apr-24		Bullet
Non listed	Not applicable		1,000,000		440		—		440			—		8.46%		28-Apr-24		28-Apr-24		Bullet
Non listed	Not applicable		1,000,000		5,948		—		5,948			—		8.46%		28-Apr-24		28-Apr-24		Bullet
Non listed	Not applicable		1,000,000		2,972		—		2,972			—		8.46%		28-Apr-24		28-Apr-24		Bullet
Non listed	Not applicable		1,000,000		1,197		—		1,197			—		8.46%		28-Apr-24		28-Apr-24		Bullet
Non listed	Not applicable		1,000,000		1,189		—		1,189			—		8.46%		28-Apr-24		28-Apr-24		Bullet
Non listed	Not applicable		1,000,000		1,188		—		1,188			—		8.46%		28-Apr-24		28-Apr-24		Bullet
Non listed	Not applicable		1,000,000		1,199		—		1,199			—		8.46%		28-Apr-24		28-Apr-24		Bullet
Non listed	Not applicable		1,000,000		1,196		—		1,196			—		8.46%		28-Apr-24		28-Apr-24		Bullet
Non listed	Not applicable		1,000,000		1,548		—		1,548			—		6.03%		22-Aug-26		22-Aug-26		Bullet
Non listed	Not applicable		1,000,000		6,765		—		6,765			—		6.03%		22-Aug-26		22-Aug-26		Bullet
Non listed	Not applicable		1,000,000		3,835		—		3,835			—		6.03%		22-Aug-26		22-Aug-26		Bullet
Non listed	Not applicable		1,000,000		11,721		—		11,721			—		6.03%		22-Aug-26		22-Aug-26		Bullet
Non listed	Not applicable		1,000,000		1,736		—		1,736			—		6.03%		22-Aug-26		22-Aug-26		Bullet
Non listed	Not applicable		1,000,000		3,663		—		3,663			—		6.03%		22-Aug-26		22-Aug-26		Bullet
Non listed	Not applicable		1,000,000		4,432		—		4,432			—		6.03%		22-Aug-26		22-Aug-26		Bullet

Total (gross)									101,114			45,429
Transaction cost									(530	)		(218	)

Total									100,584			45,211

Lease liabilities

12 Months Ended

Mar. 31, 2021

Lease liabilities

20	Lease liabilities


	As at 31 March 2021		As at 31 March 2020
Non-current
Lease liabilities (refer note 41)		1,782		1,387

		1,782		1,387

Current
Lease liabilities (refer note 41)		330		259

Tota l		330		259

Other financial liabilities

12 Months Ended

Mar. 31, 2021

Other financial liabilities

21	Other financial liabilities


	As at 31 March 2021		As at 31 March 2020
Non-current
Interest accrued but not due on debentures		132		—

		132		—

Current
Financial guarantee contracts		78		—

Financial liabilities at amortised cost
Current maturities of long term interest-bearing loans and borrowings (refer note 19)*		30,454		22,926

Others
Interest accrued but not due on borrowings		1,686		1,692
Interest accrued but not due on debentures		1,211		371
Capital creditors		9,001		8,926
Purchase consideration payable		191		272
Other payables		1		109

Total		42,622		34,296

*‘ For all long-term loan arrangements the Group has complied with the debt covenants except for long-term loan arrangements amounting to INR 10,341 as at 31 March 2021 (31 March 2020: INR 2,916), where the Group could not meet covenants with the effect that the liability became payable on demand. The Group has classified the liability as current. Further, for such borrowings outstanding as at 31 March 2021, the Group has received waiver for borrowings amounting to INR 6,446 and applied for waiver amounting to INR 3,664 (31 March 2020: the Group had subsequently received waiver from the lenders and the loan was fully repaid in November 2020)

Deferred government grant

12 Months Ended

Mar. 31, 2021

Deferred government grant

22	Deferred government grant


	As at 31 March 2021			As at 31 March 2020
Opening balance		848			891
Adjustment during the year		(58	)		(6	)
Released to the statement of profit or loss		(32	)		(37	)

Total		758			848

Current		39			38
Non-curren t		719			810

		758			848

Employee benefit liabilities

12 Months Ended

Mar. 31, 2021

Employee benefit liabilities

23	Employee benefit liabilities


	As at 31 March 2021		As at 31 March 2020
Non-current
Provision for gratuity (refer note 40)		143		103

Tota l		143		103

Current
Provision for gratuity (refer note 40)		7		5
Provision for leave encashment		143		84
Share based payment liability (refer note 42(c))		102		—

Total		252		89

Contract liabilities

12 Months Ended

Mar. 31, 2021

Contract liabilities [abstract]

Contract liabilities

24	Contract liabilities


	As at 31 March 2021		As at 31 March 2020
Non-current
Deferred revenue		1,364		—

Total		1,364		—

Current
Deferred revenue		61		1

Total		61		1

The Group has certain power purchase agreements entered with customers which contains provision for claiming cost over-runs due to change in law clause, subject to approval by appropriate authority. The significant increase in contract liabilities in the year ended 31 March 2021 is due to receipt of approval of cost

over-run

which the Group has included as part of transaction price. The contract liabilities have been recognised at the present value of estimated cash flows and it will be recognised as revenue when the Group satisfies its performance obligations under the contract, which are expected to be recognised on straight-line basis over a period of 23 years (refer note 30(c))

Provisions

12 Months Ended

Mar. 31, 2021

Provisions [abstract]

Provisions

25	Provisions


	As at 31 March 2021		As at 31 March 2020
Non-current
Provision for decommissioning costs		13,686		11,950

Total		13,686		11,950

Current
Others		—		4

Total		—		4


	Provision for decommissioning costs
As at 1 April 2019		10,377
Arised during the year		1,049
Unwinding of discount and changes in discount rate		524

As at 31 March 2020		11,950
Arised during the year		1,071
Unwinding of discount and changes in discount rate		744
Acquisition of subsidiary		21
Disposal of subsidiary		(100	)

As at 31 March 2021		13,686

Decommissioning costs

Provision has been recognised for decommissioning costs associated with premises taken on leases wherein the Group is committed to decommission the site as a result of construction of wind and solar power projects

Other liabilities

12 Months Ended

Mar. 31, 2021

Miscellaneous liabilities [abstract]

Other liabilities

26	Other liabilitie s


	As at 31 March 2021		As at 31 March 2020
Non-current
Provision for operation and maintenance equalisation		2,736		2,938
Security deposit received		—		2
Others		11		12

Total		2,747		2,952


Current
Provision for operation and maintenance equalisation		490		435
Other payables
TDS payable		1,389		1,272
GST payable		367		331
Labour welfare fund payable		1		1
Provident fund payable		19		15

Total		2,266		2,054

Interest-bearing loans and borrowings1

12 Months Ended

Mar. 31, 2021

Interest-bearing loans and borrowings

27	Interest-bearing loans and borrowings


	As at 31 March 2021		As at 31 March 2020
Working capital term loan (secured)		5,525		5,630
Loan from bank (secured)		—		1,229
Acceptances (secured)		2,169		603
Buyer’s / supplier’s credit (secured)		2,949		4,496
Loan from related party (unsecured) (refer note 44)		—		190

Total #		10,643		12,148

Working capital term loan (secured)

The term loan from bank carries interest at 8% to 9.75% per annum. The same is repayable with a bullet payment at the end of the tenure i.e.

30-365

days. It is secured by first charge by way of hypothecation entire movable properties of the borrower, including movable plant and machinery, machinery spares, tools and accessories, furniture, fixture and all other movable properties, book debts, operating cash flows, receivables, commission and revenues, all other current assets, intangible assets, goodwill, uncalled up capital except project assets.

Loan from bank (secured)

The loan carries interest at 10.35% per annum The same is repayable with a bullet payment at the end of one year from the date of disbursement. It is secured by first pari-passu charge over all present and future movable property, plant and equipment and current assets of the project, hypothecation on escrow/trust and retention account in relation to the project, first pari-passu charge on all project contracts and pledge of 51% of the equity and preference share capital of the respective borrower.

Acceptances (secured)

Acceptances are secured by pari-passu charge over all present and future current assets and movable fixed assets of the Company of respective projects for which such acceptances are taken. Discount rate of acceptances ranges from 2.23% to 5.90%. The maturity period ranges from

3-12

months.

Buyer’s / supplier’s credit (secured)

Buyer’s / supplier credit carries an interest rate of 12 month Libor plus 40 bps is secured by first pari-passu first charge by way of mortgage of all the present and future immovable properties, hypothecation of movable assets, book debt, operating cash flows, receivables, commissions, revenue of whatsoever nature, all bank accounts and all intangibles assets, assignment of all rights, title, interests, benefits, claims etc. of project documents, PPA, and insurance contracts of the Group. Creation of charge by way of mortgage and assignment is under process. These are repayable in bullet payments. The maturity period ranges from

3-12 months.

Loan from related party (unsecured)

Unsecured loan from related party is repayable on demand and carries interest at 8% per annum.

Certain borrowings included above are guaranteed by the Parent on behalf of the Group entities. Further, certain securities held in subsidiary companies are pledged with banks and financial institutions as security for financial facilities obtained by subsidiary companies

Trade payables

12 Months Ended

Mar. 31, 2021

Trade payables

28	Trade payables


	As at 31 March 2021		As at 31 March 2020
Trade payables		3,245		3,733

Total		3,245		3,733

Trade payables are

non-interest

bearing in nature. For explanations on the Group’s liquidity risk management processes, refer to note 48

Derivative Instrument Liabilities

12 Months Ended

Mar. 31, 2021

Derivative Instruments

29	Derivative instruments


	As at 31 March 2021		As at 31 March 2020
Financial liabilities at FVTOCI - cash flow hedges
Derivative instruments		1,070		—

Total		1,070		—

Revenue from contracts with customers

12 Months Ended

Mar. 31, 2021

Revenue from contracts with customers

30	Revenue from contracts with customers


	For the year ended
	31 March 2021		31 March 2020		31 March 2019
Sale of power		47,673		47,759		42,969
Sale of services - management shared services (refer note 44)		14		15		27
Income from engineering, procurement and construction service		434		543		82
Sale of services - operation and maintenance services (refer note 44)		37		16		—
Sale of services - consultancy service		26		—		—
Income from sale of renewable energy certificates		3		79		66

Total		48,187		48,412		43,144

The Group during the year ended 31 March 2021 recognised impairment losses on receivables arising from contracts with customers, included under other expenses in the consolidated statement of profit or loss, amounting to INR 386 (31 March 2020: INR 82, 31 March 2019: INR 61).

a)	The location for all of the revenue from contracts with customers is India.

b)	The timing for all of the revenue from contracts with customers is over time.

The Group has certain power purchase agreements entered with customers which contains provision for claiming cost over-runs due to change in law clause, subject to approval by appropriate authority. During the year ended 31 March 2021, on receipt of approval of cost

over-run

of INR 1,472 (31 March 2020: INR Nil), the Group has included the same as part of transaction price. Pending approval of cost over-runs of INR 1,266 (31 March 2020: INR 4,236) till the reporting period end, the Group has not included these over-runs as part of transaction price applying guidance on constraining estimates of variable consideration. Out of cost over-runs approved, the Group during the year ended 31 March 2021 has recognised revenue of INR 48 (31 March 2020: INR Nil).

d)	Transaction price - remaining performance obligation

The remaining performance obligation disclosure provides the aggregate amount of the transaction price yet to be recognised as at the end of the reporting period and an explanation as to when the Group expects to recognise these amounts in revenue. Applying the practical expedient as given in IFRS 15, the Group has not disclosed the remaining performance obligation related disclosures for contracts as the revenue recognised corresponds directly with the value to the customer of the entity’s performance completed to date. The cost over-runs which are pending approval of customers has been excluded for this disclosure because it was not included in the transaction price. These cost over-runs were excluded from the transaction price in accordance with the guidance on constraining estimates of variable consideration.

The transaction price allocated to the remaining performance obligations (unsatisfied or partially unsatisfied), other than those where Group has elected the practical expedient available under IFRS 15 as mentioned above is approximately INR 39,801 as at 31 March 2021. Out of this, the group expects to recognise revenue of approximately 4% within the next one year and the remaining thereafter. The remaining performance obligations expected to be recognised relate to the supply of power under power purchase agreements that is to be satisfied as the Group performs for the remaining term of contract. The above disclosure excludes amount recognised as contract liabilities as per note 24

e)	Contract balances


	As at 31 March 2021		As at 31 March 2020		As at 1 April 2019
Trade receivables (refer note 10)		35,980		25,914		19,176
Contract assets (refer note 13)		86		25		1
Contract liabilities (refer note 24)		1,425		1		4

Other operating income

12 Months Ended

Mar. 31, 2021

Other operating income

31	Other operating incom e


	For the year ended
	31 March 2021		31 March 2020		31 March 2019
Income from leases		80		63		176
Income from sale of emission reduction certificates		—		15		—

Total		80		78		176

Finance income

12 Months Ended

Mar. 31, 2021

Finance income

32	Finance income


	For the year ended
	31 March 2021		31 March 2020		31 March 2019
Interest income accounted at amortised cost
- on fixed deposit with banks		1,563		2,044		1,393
- on trade receivables		114		—		—
- others		212		135		78
Gain on settlement of financial liabilities*		1,465		—		—

Total		3,354		2,179		1,471

Represents gain on derecognition of long term interest-bearing loans and borrowings accounted for using amortised cost method on account of reduction in premium on redemption due to early repayment

Other income

12 Months Ended

Mar. 31, 2021

Other income

33	Other income


	For the year ended
	31 March 2021		31 March 2020		31 March 2019
Government grant
- generation based incentive		1,846		2,098		2,288
- viability gap funding		32		37		39
Compensation for loss of revenue		431		89		379
Gain on sale of intangibles		0		219		—
Insurance claim		63		34		41
Fair value change of mutual fund (including realised gain)		—		—		272
Fair value gain on investment (refer note 54)		27		—		77
Income tax refund		160		—		—
Gain on derivative instruments designated as cash flow hedge (net)		16		—		—
Miscellaneous incom e		295		157		15

Total		2,870		2,634		3,111

Employee benefits expense

12 Months Ended

Mar. 31, 2021

Employee benefits expense

34	Employee benefits expense


	For the year ended
	31 March 2021		31 March 2020		31 March 2019
Salaries, wages and bonus		949		785		728
Contribution to provident and other funds		50		37		41
Share based payments (refer note 42)		203		72		183
Gratuity expense (refer note 40)		15		13		13
Staff welfare expense s		42		44		43

Total		1,259		951		1,008

Depreciation and amortisation

12 Months Ended

Mar. 31, 2021

Depreciation and amortisation

35	Depreciation and amortisation


	For the year ended
	31 March 2021		31 March 2020		31 March 2019
Depreciation of property, plant and equipment (refer note 5)		10,615		9,865		8,187
Amortisation of intangible assets (refer note 6)		1,166		1,145		1,118
Depreciation of right of use assets (refer note 7)		245		230		191

Tota l		12,026		11,240		9,496

Other expenses

12 Months Ended

Mar. 31, 2021

Other expenses

36	Other expenses


	For the year ended
	31 March 2021		31 March 2020		31 March 2019
Legal and professional fees		790		686		898
Corporate social responsibilit y		82		73		53
Travelling and conveyance		148		163		151
Lease rent relating to short term leases		22		24		23
Director’s commission		15		9		15
Printing and stationery		3		2		2
Rates and taxes		235		191		158
Payment to auditors		63		51		72
Insurance		527		201		148
Operation and maintenance		3,935		3,488		2,667
Repair and maintenance		104		65		23
Loss on sale/damage of property plant and equipment		205		104		197
Bidding expenses		12		26		22
Advertising and sales promotion		30		22		8
Impairment of capital work in progress		39		—		—
Security charges		241		195		176
Communication costs		36		31		26
Impairment loss on assets of disposal group held for sale (refer note 39)		408		—		—
Impairment allowances for financial assets		416		82		61
Miscellaneous expenses		271		252		103

Total		7,582		5,665		4,804

Finance costs

12 Months Ended

Mar. 31, 2021

Earnings / (loss) per share

Finance costs

37	Finance costs


	For the year ended
	31 March 2021		31 March 2020		31 March 2019
Interest expense on (accounted at amortised cost)
- term loans		14,916		14,575		12,402
- loan from related party (refer note 44)		19		15		12
- acceptance		49		499		667
- buyer’s/supplier’s credit		68		420		1,159
- on working capital demand loan		252		602		331
- non convertible debentures		5,274		6,140		6,485
- compulsorily convertible debentures (unsecured)		60		59		78
- commercial papers		—		11		405
- senior secured notes		10,791		7,938		4,357
- lease liabilities		113		105		26
- compulsory convertible preference shares		3,361		2,230		—
- others		9		17		16
Bank charges		428		411		376
Option premium amortisation*		1,773		1,119		69
Loss on settlement of derivative instruments designated as cash flow hedge (net)*		76		302		304
Unwinding of discount on provisions		745		524		329
Unamortised ancillary borrowing cost written off#		347		520		523

Total		38,281		35,487		27,538

Reclassification of option premium amortisation on derivative instruments and loss on settlement of derivative instruments designated as cash flow hedge from other expenses to finance costs within the statement of profit or loss

The Group

re-assessed

classification of option premium amortisation on derivative instruments and loss on settlement of derivative instruments designated as cash flow hedge. The Group had previously classified these items under the head other expenses (note 36) in the statement of profit or loss. During the current financial year, the Group elected to change the classification of these items under the head finance costs in the statement of profit or loss, as the Group believes that such a reclassification provides more relevant information to the users of its financial statements given that it is aligned to practices adopted by its competitors. In addition, the derivative instruments are obtained to mitigate the currency risk on foreign currency interest-bearing loans and borrowings and accordingly classifying the same under head finance cost would be a more reliable presentation.

The Group applied this reclassification retrospectively and has an effect on the current and previous years presented. This reclassification has resulted in an increase in finance costs by INR 1,849 for the year ended 31 March 2021 (31 March 2020: INR 1,421, 31 March 2019: INR 373) with corresponding decrease in other expenses for the respective years. The reclassification has no impact on the profit/(loss) and basic and diluted earnings per share of the Group for the years ended 31 March 2021, 2020 and 2019.

This reclassification has resulted in increase in cash outflows from financing activities by INR 1,293 (31 March 2020: INR 1,119, 31 March 2019: INR 69) with a corresponding increase of cash inflows from operating activities for the year ended 31 March 2021, 2020 and 2019.

Represents transaction cost on long term interest-bearing loans and borrowings charged to the statement of profit or loss on account of derecognition due to substantial modification

Earnings / (loss) per share

12 Months Ended

Mar. 31, 2021

Earnings per share [abstract]

38	Earnings / (loss) per share

The following reflects the profit and share data used for the basic and diluted EPS computations:


	For the year ended
	31 March 2021			31 March 2020			31 March 2019
(Loss) / profit attributable to equity holders for basic earnings		(7,818	)		(2,696	)		2,646

		(7,818	)		(2,696	)		2,646

(Loss) / profit attributable to equity holders of parent for basic EPS		(7,818	)		(2,696	)		2,646
Weighted average number of equity shares for calculating basic EPS		483,921,868			459,201,195			379,797,836
Basic (loss) / earnings per share (in INR)		(16.16	)		(5.87	)		6.97


	For the year ended
	31 March 2021			31 March 2020			31 March 2019
Loss / profit attributable to equity holders of parent for diluted EPS		(7,818	)		(2,696	)		2,646
Weighted average number of equity shares for calculating diluted EPS		483,921,868			459,201,195			385,804,858

Diluted loss / earnings per share* (in INR)		(16.16	)		(5.87	)		6.86
Weighted average number of equity shares in calculating basic EPS		379,924,556			379,924,556			379,797,836

Effect of dilution in calculating basic EPS and diluted EPS
Compulsory convertible preference shares		103,997,312			79,276,639			—

Weighted average number of equity shares in calculating basic EPS		483,921,868			459,201,195			379,797,836

Effect of dilution in calculating diluted EPS
Convertible equity for employee stock option plan		7,476,734			4,866,286			6,007,022

Weighted average number of equity shares in calculating diluted EPS		491,398,602			464,067,481			385,804,858

Since the effect of conversion of employee stock option plan was anti-dilutive in the years ended 31 March 2021 and 2020, it has not been considered for the purpose of computing diluted EPS.

The Group has elected to provide EPS figures for the puttable instruments as referred to in Note 17A

Disposal of subsidiary

12 Months Ended

Mar. 31, 2021

Disclosure of Disposal Groups Classified as Held For Sale [Abstract]

Disposal of subsidiary

39	Disposal of subsidiary

On 28 September 2020, the board of directors approved the plan to sell 300 MW Pavagada solar project housed in Adyah Solar Energy Private Limited (Adyah Solar), a wholly owned subsidiary which falls under Solar power reportable segment. The Group has entered into a sale and purchase agreement dated 31 October 2020 for sale of 100% shareholding in Adyah Solar to Ayana Renewable Power Private Limited. At 28 September 2020, the loss of control over Adyah Solar within the next twelve months became highly probable and met the criteria to be classified as a disposal group held for sale and accordingly, assets and liabilities related to the entity were classified as held for sale. The transaction was completed on 15 February 2021.

The total consideration for sale was as INR 5,549 and the net assets of the entity were INR 5,957 excluding deferred tax assets of INR 306. Since total consideration for sale is lower than net assets of the entity disposed, the Group had derecognised deferred tax assets of INR

306

, with the corresponding amount recognised under deferred tax in the consolidated statement of profit or loss.

a)	Assets and liabilities of Adyah Solar at the date of disposal


Particulars		As at 15 February 2021
Assets
Property, plant and equipment			14,383
Right of use assets			1,571
Trade receivables			621
Bank balances other than cash and cash equivalents			392
Cash and cash equivalents			16
Other non-current assets			10
Prepayments (non-current)			37
Other current financial assets			2
Other current assets			25

Total assets	(a)		17,057
Liabilities
Interest-bearing loans and borrowings			10,336
Others non-current financial liabilities			596
Long term provisions			100
Others current financial liabilities			48
Other current liabilities			20

Total liabilities	(b)		11,100

Net assets sold	(c) = (a) - (b)		5,957

Total consideration	(d)		5,549
Total impairment loss on assets of disposal group held for sale (presented under other expenses in statement of profit or loss)	(d) = (c) - (d)		408
Consideration satisfied by:
Cash and cash equivalents			3,613
Deferred consideration receivable			1,936

			5,549

The deferred consideration represents the fair value of consideration receivable and the same is contractually recoverable on the receipt of safeguard duty claims under change in law clause by Adyah Solar from its customers. This consideration is expected to be settled in cash by the purchaser by 31 March 2022. Considering the period involved, impact of time value of money is minimal.

There is no reclassification of amounts from OCI relating to Adyah Solar.

c)	The results of Adyah Solar included in statement of profit or loss were as follows:


	For the year ended
	31 March 2021			31 March 2020
Income		2,372			1,998
Expenses		(2,718	)		(2,563	)

Loss before tax		(346	)		(565	)
Income tax expense		229			113

Loss for the year		(117	)		(452	)

In accordance with the IFRS 5, depreciation and amortisation on the assets of Adyah Solar Energy Private Limited ceased as at 28 September 2020.

d)	Impact on cash flow statement

During the year ended 31 March 2021, Adyah Solar contributed INR 1,120 (31 March 2020: INR 1,061) to the Group’s net operating cash flows, INR 206 (31 March 2020: paid INR 2,770) in respect of investing activities and paid INR 1,354 (31 March 2020: contributed INR 1,727) in respect of financing activities


Net cash inflow arising on disposal:
Consideration received in cash and cash equivalents	3,613
Less: cash and cash equivalents disposed	(16	)

	3,597

Gratuity and other post-employment benefit plans

12 Months Ended

Mar. 31, 2021

Disclosure of information about defined benefit plans [abstract]

Gratuity and other post-employment benefit plans

40	Gratuity and other post-employment benefit plans

Retirement benefit in the form of provident fund is a defined contribution scheme. The contributions to the provident fund are charged to the statement of profit or loss for the year when the contributions are due. The Group has no obligation, other than the contribution payable to the provident fund.

The Group has a defined benefit gratuity plan. Gratuity is computed as 15 days’ salary, for every completed year of service or part thereof in excess of 6 months and is payable on retirement/termination/resignation. The benefit vests on the employees after completion of 5 years of service. The Gratuity liability has not been externally funded. Group makes provision of such gratuity liability in the books of accounts on the basis of actuarial valuation as per the projected unit credit method.

The following tables summarise the components of net benefit expense recognised in the statement of profit or loss and the unfunded status and amounts recognised in the statement of financial position for gratuity.

a) Statement of profit or loss and OCI


	For the year ended
	31 March 2021			31 March 2020			31 March 2019
Net employees benefit expense recognised in employee cost
Current service cost		31			25			25
Interest cost on benefit obligation		7			6			5

Net benefit expense*		38			31			30


* This amount is inclusive of amount capitalised in different projects.

Net (expense) / income recognised in OCI		(8	)		(13	)		14

b) Statement of financial position


	As at 31 March 2021		As at 31 March 2020
Defined benefit liability
Present value of unfunded obligation		150		108

Net liability		150		108


	For the year ended
	31 March 2021			31 March 2020			31 March 2019
Changes in the present value of the defined benefit obligation
Opening defined benefit obligation		108			75			53
Current service cost		31			25			25
Interest cost		7			6			5
Benefits paid		(6	)		(10	)		(0	)
Liabilities assumed / (settled)		—			(1	)		—
Remeasurements during the year due to:
- Experience adjustments		7			2			(14	)
- Change in financial assumptions		—			11			—
- Change in demographic assumptions		—			0			(0	)
Liabilities net of planned assets assumed under business combination		3			—			—
Assets extinguished on curtailments/settlements		—			—			6

Closing defined benefit obligation		150			108			75

Since the entire amount of plan obligation is unfunded therefore changes in fair value of plan assets, categories of plan assets as a percentage of the fair value of total plan assets and Group’s expected contribution to the plan assets for the next year is not given.

c) Principal assumptions used in determining gratuity obligations


	For the year ended
	31 March 2021			31 March 2020			31 March 2019
Discount rate		6.85	%		6.85	%		7.75	%
Salary escalation		10.00	%		10.00	%		10.00	%

The estimates of future salary increases considered in actuarial valuation take account of inflation, total amount of inflation, seniority, promotion and other relevant factors, such as supply and demand in the employment market.

The Group regularly assesses these assumptions with the projected long-term plans and prevalent industry standards. The impact of sensitivity due to changes in the significant actuarial assumptions on the defined benefit obligations is given in the table below:


Particulars	Change in assumptions			For the year ended
Particulars	Change in assumptions			31 March 2021		31 March 2020		31 March 2019
Discount rate		+ 0.5	%		141		110		66
		- 0.5	%		159		97		76
Salary escalation		+ 0.5	%		156		110		74
		- 0.5	%		144		97		67

The sensitivity analysis above has been determined based on a method that extrapolates the impact on defined benefit obligation as a result of reasonable changes in key assumptions occurring at the end of the year.

d) Projected plan cash flow

The table below shows the expected cash flow profile of the benefits to be paid to the current membership of the plan based on past service of the employees as at the valuation date:


Maturity profile	As at 31 March 2021		As at 31 March 2020
Within next 12 months		7		5
From 2 to 5 years		37		27
From 6 to 9 years		40		36
10 years and beyond		330		226

The weighted average duration to the payment of these cash flows is 13 years (31 March 2020: 13.32 years).

e) Risk analysis

The Group is exposed to a number of risks in the defined benefit plans. Most significant risks pertaining to defined benefits plans and management estimation of the impact of these risks are as follows:

i) Inflation risk:

Currently the Group has not funded the defined benefit plans. Therefore, the Group will have to bear the entire increase in liability on account of inflation.

ii) Longevity risk / life expectancy:

The present value of the defined benefit plan liability is calculated by reference to the best estimate of the mortality of plan participants both during and at the end of the employment. An increase in the life expectancy of the plan participants will increase the plan liability.

iii) Salary growth risk:

The present value of the defined benefit plan liability is calculated by reference to the future salaries of plan participants. An increase in the salary of the plan participants will increase the plan liability

Defined contribution plan

For the year ended

31 March
2021

31 March
2020

31 March
2019

Contribution to provident fund and other fund charged to statement of profit or loss (inclusive of amount capitalised in different projects)

108

Leases

12 Months Ended

Mar. 31, 2021

Leases

The Group has entered into leases for its offices and leasehold lands. These leases generally have lease terms of 5 to 30 years. The Group also has certain leases of regional offices and office equipment with lease terms of 12 months or less and lease of office equipments with low value. The Group applies the ‘short-term lease’ and ‘lease of

low-value

assets’ recognition exemptions for these leases. Set out below are the carrying amounts of lease liabilities carried at amortised cost and the movements during the year:


	For the year ended
Particulars	31 March 2021			31 March 2020			31 March 2019
Opening balance		1,646			1,436			1,034
Additions		1,101			410			1,943
Acquisition of subsidiary		17			—			—
Capitalised during the year		105
Accretion of interest		113			147			125
Lease modification during the year		(26	)		—			—
Disposal of subsidiary		(596	)		—			—
Payments		(248	)		(347	)		(1,666	)

Closing balance		2,112			1,646			1,436

Current		330			259			347
Non-current		1,782			1,387			1,089

Notes:

There are no restrictions or covenants imposed by leases.

Refer note 36 for rental expense recorded for short-term leases and low value leases.

There are no amounts payable toward variable lease expense recognised for the years ended 31 March 2021, 2020 and 2019.

The maturity analysis of lease liabilities are disclosed in note 48.

There are no leases which have not yet commenced to which the lessee is committed

The effective interest rate for lease liabilities is 10.40%

Share based payment

12 Months Ended

Mar. 31, 2021

Share based payment

42	Share based payment

a) Equity settled share-based payment transactions

The Group has five share-based payment schemes for its employees:

2018 Stock Option Plan, 2017 Stock Option Plan, 2016 Stock Option Plan, 2014 Stock Option Plan and 2011 Stock Option Plan (‘Group Stock Option Plans’) approved by the board. According to the ESOP schemes, the employee selected by the compensation committee from time to time will be entitled to options as per grant letter issued by the committee, subject to satisfaction of prescribed vesting conditions.

The relevant terms of the ESOP schemes are as below:

Plans

2018 Stock

Option Plan

Modified

(new plan)

2018 Stock

Option Plan

2017 Stock

Option Plan

2016 Stock

Option Plan

2014 Stock

Option Plan

2011 Stock

Option Plan

Grant date

16 August 2019

Multiple

Vesting period

Time linked vesting:

Grants will vest in 5 years on quarterly basis which shall commence one year after the date of grant of options

Time linked vesting

: 50 % of grants will vest in 5 years as follows:

i) One year from the date of grant, the Options for the first four quarters shall vest immediately.

ii) Thereafter, vesting will continue on a quarterly basis for the unvested Options.

Remaining 50% will vest at the end of 5 years from the date of grant.

Time linked vesting:

50 % of grants will vest in 5 years as follows:

i) One year from the date of grant, the Options for the first four quarters shall vest immediately.

ii) Thereafter, vesting will continue on a quarterly basis for the unvested Options.

Remaining 50% will vest at the end of 5 years from the date of grant.

Time linked vesting:

5 years on quarterly basis effective from 1 December 2015 on completion of one year from the date of grant, the Options for the first seven quarters shall vest immediately. Thereafter, vesting will continue on quarterly basis for the unvested Options commencing from 1 December 2017.

Performance linked vesting:

The Options shall vest annually and shall be prorated over a period of 3 years from the date of grant and shall be subject to the EBITDA achieved by the Company for the last completed financial year. The vesting of the Options shall take place at the end of the first anniversary of the date of grant (Vesting date) and thereafter on 31 March 2018 and 31 March 2019 or at a later date when the audited financial statements of the Company are available.

Time linked vesting:

5 years on quarterly basis which shall commence one year after the date of grant of option

Time linked vesting:

5 years from the grant date

Exercise period

Within 10 years from date of grant upon vesting

Exercise price

INR 400

INR 400, INR 415 and INR 420

INR 340

INR 205

INR 100 and 131

INR 100

Expiry date

16 August 2029

24 April 2028 to 31 December 2030

10 April 2027 to 25 February 2028

30 September 2026

31 December 2022 to 01 January 2025

30 September 2021 to 31 December 2022

Settlement type

Equity settled

Number of options outstanding as at (in million):

31 March 2020

31 March 2021

The movement of options outstanding under the share-based payment schemes are summarised below:


	Number of options (in million)
Particulars	31 March 2021			31 March 2020			31 March 2019
Outstanding at the beginning of the year		18			19			21
Granted during the year		1			1			1
Forfeited during the year		(0	)		(2	)		(0	)
Repurchase during the year		(3	)		—			—
Exercised during the year		—			—			(3	)

Outstanding at the end of the year		16			18			19

Exercisable at the end of the year		8			9			9

•

The weighted average exercise price of these options outstanding was INR 303 for the year ended 31 March 2021 (31 March 2020: INR 280, 31 March 2019: INR 258).

•

The weighted average exercise price of these options granted during the year was INR 404 for the year ended 31 March 2021 (31 March 2020: INR 400, 31 March 2019: INR 415).

•

There were no options exercised during the years ended 31 March 2021 and 2020. The weighted average exercise price of options exercised during 31 March 2019: INR 205.

•

The weighted average exercise price of these options forfeited during the year was INR 395 for the year ended 31 March 2021 (31 March 2020: INR 189, 31 March 2019: INR 290).

•

The weighted average exercise price of these options repurchased during the year was INR 157 for the year ended 31 March 2021 (No options were repurchased during the years ended 31 March 2020 and 2019)

•

The weighted average exercise price of exercisable options was INR 250 for the year ended 31 March 2021 (31 March 2020: INR 206, 31 March 2019: INR 178).

•

The weighted average remaining contractual life of options outstanding as at 31 March 2021 was 5.75 years (31 March 2020: 6.30 years)

The following tables list the inputs to the models used for the years ended 31 March 2021, 2020 and 2019, respectively:


	For the year ended
Particulars	31 March 2021	31 March 2020	31 March 2019
Dividend yield (%)	3.4%	2.9%	1.5%
Expected volatility (%)	22%	23%	15%
Risk–free interest rate (%)	4.16% - 5.92%	6.53%	7.70% - 8.12%
Weighted average remaining contractual life of options granted during current period	9.44 years	9.37 years	9.47 years
Weighted average share price (in INR)	471	415	415
Weighted average fair value (in INR)	133.01	110.43	121.84

•

The fair value of share options granted is estimated at the date of grant using Black-Scholes valuation model, taking into account the terms and conditions upon which the share options were granted.

•

The expected volatility reflects the assumption that the historical volatility over a period similar to the life of the options is indicative of future trends, which may not necessarily be the actual outcome.

b) Repurchase of vested stock options

During the year ended 31 March 2021, the Group undertook a

one-time

partial liquidity scheme for outstanding ESOPs, wherein, maximum 40% options vested as on 31 July 2020 out of options granted up to 31 March 2018 were eligible for surrender for INR 420 per option. The total number of options opted by employees for surrender were 2,592,557 options. Settlement has been done by the Group in the form of

ex-gratia

payment equal to value accreted against the surrendered options subject to and net of applicable tax deduction at source. All applicable taxes are to be borne by the employee. Surrendered options are subject to value adjustment in case Group or any of its holding company issues primary securities or on signing of any definitive agreements before 31 July 2021 at higher / lower than INR 420 per share (adjusted for capital restructurings, consolidations, split etc.). Actual adjustments for upside or downside will be settled post completion of the deal. Upsides shall accrue to an employee only if they continue in employment as of 31 July 2021. Employee shall be liable for downside value adjustment even if he or she ceased employment If no deal is completed by 31 October 2021, the deal will be disregarded for adjustments.

The details of repurchase of vested stock options are as follows:


Particulars	Amount
Total consideration paid for repurchase of vested stock options (a)		681
Fair value of the vested stock options repurchased, measured at the repurchase date, recognised in equity* (b)		650
Excess consideration paid recognised in statement of profit or loss (a) - (b)		31

The fair value of vested stock options was estimated at the date of repurchase using Black-Scholes valuation model, taking into account the terms and conditions upon which the share options were granted using following inputs as at 31 July 2021.


Particulars		31 March 2021
Share price per share at measurement date		420
Expected volatility		22%
Dividend yield		3.40%
Risk-free interest rate		4.16% - 5.92%

c) Cash settled share based payments arising out of a

one-time

partial liquidity scheme (refer note b above)

The carrying amount of the liability (included in employee benefit liabilities) relating to the cash settled share based payments at 31 March 2021 was INR 102 (31 March 2020: INR Nil). No cash settled share based payments had vested or forfeited at 31 March 2021 and 2020, respectively. Outstanding cash settled options as at 31 March 2021 are 2,592,557. None of the cash settled options are exercisable as at 31 March 2021.

The fair value of the cash settled share based payments was determined using the Black-Scholes model using the following inputs as at 31 March 2021:


Particulars		31 March 2021
Share price per share at measurement date		420
Expected volatility		22%
Dividend yield		3.40%
Risk-free interest rate		4.16% - 5.92%

•

d) Expenses arising from share-based payment transactions

The expense recognised for employee services received during the year is shown in the following table:


	For the year ended
Particulars	31 March 2021		31 March 2020		31 March 2019
Expense arising from equity-settled share-based payment transactions		189		206		316
Expense arising from repurchases vested stock options		31		—		—
Expense arising from cash settled share based payments transactions		102		—		—

Total expense arising from share-based payment transactions*		322		206		316

This amount is inclusive of amount capitalised in different projects

Group information

12 Months Ended

Mar. 31, 2021

Group information

43	Group information

(a) Subsidiaries

The group’s subsidiaries are set out below. Unless otherwise stated, they have equity share capital that are held directly held by the group, and the proportion of ownership interests held equals to the voting rights held by the group. The country of incorporation is also their principal place of business.


S.No	Name of companies	Holding company	Country of incorporation	As at 31 March 2021	As at 31 March 2020
1	ReNew Wind Energy (AP 3) Private Limited	ReNew Power Private Limited	India	100%	100%
2	ReNew Solar Power Private Limited^	ReNew Power Private Limited	India	100%	100%
3	ReNew Wind Energy (MP) Private Limited	ReNew Power Private Limited	India	100%	100%
4	ReNew Wind Energy (Varekarwadi) Private Limited	ReNew Power Private Limited	India	100%	100%
5	ReNew Wind Energy Delhi Private Limited	ReNew Power Private Limited	India	100%	100%
6	ReNew Wind Energy (Jamb) Private Limited	ReNew Power Private Limited	India	100%	100%
7	ReNew Wind Energy (Devgarh) Private Limited	ReNew Power Private Limited	India	100%	100%
8	ReNew Wind Energy (AP) Private Limited*	ReNew Power Private Limited	India	70%	66%
9	Narmada Wind Energy Private Limited	ReNew Power Private Limited	India	100%	100%
10	ReNew Wind Energy (Sipla) Private Limited	ReNew Power Private Limited	India	100%	100%
11	ReNew Solar Energy (Jharkhand One) Private Limited^	ReNew Solar Power Private Limited	India	100%	100%
12	ReNew Solar Energy (Jharkhand Three) Private Limited*	ReNew Solar Power Private Limited	India	51%	51%
13	ReNew Solar Energy (Jharkhand Four) Private Limited	ReNew Solar Power Private Limited	India	100%	100%
14	ReNew Solar Energy (Jharkhand Five) Private Limited	ReNew Solar Power Private Limited	India	100%	100%
15	ReNew Wind Energy (Karnataka Two) Private Limited	ReNew Power Private Limited	India	100%	100%
16	Abaha Wind Energy Developers Private Limited	ReNew Power Private Limited	India	100%	100%
17	ReNew Solar Energy Private Limited^	ReNew Power Private Limited	India	100%	100%
18	ReNew Wind Energy (TN) Private Limited	ReNew Power Private Limited	India	100%	100%
19	ReNew Wind Energy (Budh 3) Private Limited	ReNew Solar Power Private Limited	India	100%	100%
20	ReNew Wind Energy (MP One) Private Limited	ReNew Power Private Limited	India	100%	100%
21	ReNew Solar Energy (Telangana) Private Limited*	ReNew Solar Power Private Limited	India	51%	51%
22	ReNew Power Services Private Limited^$	ReNew Power Private Limited	India	100%	100%
23	ReNew Solar Energy (Karnataka Two) Private Limited	ReNew Solar Power Private Limited	India	100%	100%
24	ReNew Wind Energy (Shivpur) Private Limited	ReNew Power Private Limited	India	100%	100%
25	ReNew Wind Energy (Karnataka) Private Limited*	ReNew Power Private Limited	India	71%	64%
26	ReNew Wind Energy (Karnataka 3) Private Limited	ReNew Solar Power Private Limited	India	100%	100%
27	ReNew Wind Energy (AP Five) Private Limited	ReNew Solar Power Private Limited	India	100%	100%
28	ReNew Saur Urja Private Limited	ReNew Solar Power Private Limited	India	100%	100%
29	Bhumi Prakash Private Limited	ReNew Solar Power Private Limited	India	100%	100%
30	Tarun Kiran Bhoomi Private Limited	ReNew Solar Power Private Limited	India	100%	100%
31	ReNew Saur Shakti Private Limited (Formerly known as Surya Prakash Urja Bhoomi Private Limited)	ReNew Solar Power Private Limited	India	100%	100%
32	ReNew Agni Power Private Limited (Formerly known as Bhanu Dhara Kiran Private Limited)	ReNew Solar Power Private Limited	India	100%	100%
33	ReNew Mega Solar Power Private Limited (Formerly known as Sun Season Private Limited)*	ReNew Solar Power Private Limited	India	51%	51%
34	ReNew Wind Energy (Rajasthan 2) Private Limited	ReNew Power Private Limited	India	100%	100%
35	ReNew Wind Energy (MP Two) Private Limited	ReNew Power Private Limited	India	100%	100%
36	ReNew Wind Energy (Jath Three) Private Limited	ReNew Power Private Limited	India	100%	100%
37	ReNew Wind Energy (Karnataka 4) Private Limited	ReNew Solar Power Private Limited	India	100%	100%
38	ReNew Wind Energy (Maharashtra) Private Limited	ReNew Solar Power Private Limited	India	100%	100%
39	ReNew Wind Energy (MP Four) Private Limited	ReNew Solar Power Private Limited	India	100%	100%
40	ReNew Wind Energy (AP2) Private Limited	ReNew Power Private Limited	India	100%	100%
41	ReNew Wind Energy (Orissa) Private Limited	ReNew Power Private Limited	India	100%	100%
42	ReNew Wind Energy (AP 4) Private Limited	ReNew Power Private Limited	India	100%	100%
43	ReNew Wind Energy (Jadeswar) Private Limited	ReNew Power Private Limited	India	100%	100%
44	ReNew Wind Energy (Welturi) Private Limited	ReNew Power Private Limited	India	100%	100%
45	ReNew Solar Services Private Limited^$ (Formerly known as ReNew Wind Energy (Vaspet 4) Private Limited)	ReNew Solar Energy Private Limited	India	100%	100%
46	ReNew Solar Energy (Rajasthan) Private Limited	ReNew Solar Power Private Limited	India	100%	100%
47	ReNew Wind Energy (Vaspet 5) Private Limited	ReNew Power Private Limited	India	100%	100%
48	ReNew Solar Energy (Karnataka) Private Limited*	ReNew Solar Power Private Limited	India	100%	100%
49	ReNew Wind Energy (TN 2) Private Limited	ReNew Solar Power Private Limited	India	100%	100%
50	ReNew Wind Energy (Rajkot) Private Limited	ReNew Power Private Limited	India	100%	100%
51	ReNew Wind Energy (Rajasthan) Private Limited	ReNew Power Private Limited	India	100%	100%
52	ReNew Akshay Urja Limited (Formerly known as ReNew Akshay Urja Private Limited)*	ReNew Solar Power Private Limited	India	100%	56%
53	ReNew Wind Energy (Jath) Limited (Formerly known as ReNew Wind Energy (Jath) Private Limited)	ReNew Power Private Limited	India	100%	100%
54	ReNew Wind Energy (Rajasthan One) Private Limited	ReNew Power Private Limited	India	100%	100%
55	ReNew Wind Energy (Rajasthan 3) Private Limited	ReNew Power Private Limited	India	100%	100%
56	ReNew Solar Energy (TN) Private Limited	ReNew Solar Power Private Limited	India	100%	100%
57	ReNew Wind Energy (Karnataka Five) Private Limited	ReNew Power Private Limited	India	100%	100%
58	ReNew Wind Energy (MP Three) Private Limited	ReNew Solar Power Private Limited	India	100%	100%
59	ReNew Wind Energy (Rajasthan Four) Private Limited	ReNew Solar Power Private Limited	India	100%	100%
60	ReNew Clean Energy Private Limited	ReNew Solar Power Private Limited	India	100%	100%
61	ReNew Distributed Solar Energy Private Limited^	ReNew Solar Energy Private Limited	India	100%	100%
62	ReNew Distributed Solar Services Private Limited	ReNew Solar Energy Private Limited	India	100%	100%
63	ReNew Distributed Solar Power Private Limited^	ReNew Solar Energy Private Limited	India	100%	100%
64	ReNew Surya Mitra Private Limited*^	ReNew Solar Energy Private Limited	India	68%	1%
65	ReNew Surya Prakash Private Limited^	ReNew Solar Energy Private Limited	India	100%	100%
66	ReNew Saur Vidyut Private Limited^	ReNew Solar Energy Private Limited	India	100%	100%
67	ReNew Solar Daylight Energy Private Limited	ReNew Solar Energy Private Limited	India	100%	100%
68	ReNew Solar Sun Flame Private Limited	ReNew Solar Energy Private Limited	India	100%	100%
69	ReNew Power Singapore Pte. Ltd.	ReNew Power Private Limited	Singapore	100%	100%
70	Abha Sunlight Private Limited	ReNew Solar Power Private Limited	India	100%	100%
71	Nokor Solar Energy Private Limited	ReNew Solar Power Private Limited	India	100%	100%
72	Izra Solar Energy Private Limited	ReNew Solar Power Private Limited	India	100%	100%
73	Zorya Solar Energy Private Limited	ReNew Solar Power Private Limited	India	100%	100%
74	Vivasvat Solar Energy Private Limited	ReNew Solar Power Private Limited	India	100%	100%
75	Nokor Bhoomi Private Limited	ReNew Solar Power Private Limited	India	100%	100%
76	Akhilagya Solar Energy Private Limited	ReNew Solar Power Private Limited	India	100%	100%
77	Adyah Solar Energy Private Limited@	ReNew Solar Power Private Limited	India	—	100%
78	ReNew Transmission Ventures Private Limited	ReNew Power Private Limited	India	100%	100%
79	Helios Infratech Private Limited	ReNew Power Private Limited	India	100%	100%
80	Shruti Power Projects Private Limited	ReNew Power Private Limited	India	100%	100%
81	Lexicon Vanijya Private Limited	ReNew Solar Power Private Limited	India	100%	100%
82	Symphony Vyapaar Private Limited	ReNew Solar Power Private Limited	India	100%	100%
83	Star Solar Power Private Limited	ReNew Solar Power Private Limited	India	100%	100%
84	Sungold Energy Private Limited	ReNew Solar Power Private Limited	India	100%	100%
85	ReNew Energy Services Private Limited (formerly known as Sunsource Energy Services Private Limited)	ReNew Solar Energy Private Limited	India	100%	100%
86	Molagavalli Renewable Private Limited	ReNew Power Private Limited	India	100%	100%
87	ReNew Vayu Urja Private Limited (Formerly known as KCT Renewable Energy Private Limited)	ReNew Power Private Limited	India	100%	100%
88	Rajat Renewables Limited	ReNew Power Private Limited	India	100%	100%
89	Kanak Renewables Limited	ReNew Power Private Limited	India	100%	100%
90	Bidwal Renewable Private Limited	ReNew Power Private Limited	India	100%	100%
91	Pugalur Renewable Private Limited	ReNew Power Private Limited	India	100%	100%
92	AVP Powerinfra Private Limited	Ostro Energy Private Limited	India	100%	100%
93	Badoni Power Private Limited	Ostro Energy Private Limited	India	100%	100%
94	Ostro Alpha Wind Private Limited	Ostro Energy Private Limited	India	100%	100%
95	Ostro Anantapur Private Limited	Ostro Energy Private Limited	India	100%	100%
96	Ostro Andhra Wind Private Limited	Ostro Energy Private Limited	India	100%	100%
97	Ostro AP Wind Private Limited	Ostro Energy Private Limited	India	100%	100%
98	Ostro Bhesada Wind Private Limited	Ostro Energy Private Limited	India	100%	100%
99	Ostro Dakshin Power Private Limited	Ostro Energy Private Limited	India	100%	100%
100	Ostro Dhar Wind Private Limited	Ostro Energy Private Limited	India	100%	100%
101	Ostro Jaisalmer Private Limited	Ostro Energy Private Limited	India	100%	100%
102	Ostro Kannada Power Private Limited	Ostro Energy Private Limited	India	100%	100%
103	Ostro Kutch Wind Private Limited	Ostro Energy Private Limited	India	100%	100%
104	Ostro Madhya Wind Private Limited	Ostro Energy Private Limited	India	100%	100%
105	Ostro Mahawind Power Private Limited	Ostro Energy Private Limited	India	100%	100%
106	Ostro Raj Wind Private Limited	Ostro Energy Private Limited	India	100%	100%
107	Ostro Rann Wind Private Limited	Ostro Energy Private Limited	India	100%	100%
108	Ostro Renewables Private Limited	Ostro Energy Private Limited	India	100%	100%
109	Ostro Urja Wind Private Limited	Ostro Energy Private Limited	India	100%	100%
110	Prathmesh Solarfarms Limited (refer note 54)	Ostro Energy Private Limited	India	100%	100%
111	Ostro Energy Private Limited	ReNew Power Services Private Limited	India	100%	100%
112	Zemira Renewable Energy Limited	ReNew Power Private Limited	India	100%	100%
113	ReNew Americas Inc. D	ReNew Power Private Limited	United States of America	—	100%
114	Auxo Solar Energy Private Limited	Renew Wind Energy (TN) Private Limited	India	100%	100%
115	ReNew Power International Limited	ReNew Power Private Limited	United Kingdom	100%	100%
116	Zorya Distributed Power Services Private Limited	ReNew Solar Energy Private Limited	India	100%	100%
117	ReNew Cleantech Private Limited	ReNew Solar Energy Private Limited	India	100%	100%
118	ReNew Sun Ability Private Limited	ReNew Solar Energy Private Limited	India	100%	100%
119	ReNew Mega Light Private Limited	ReNew Solar Energy Private Limited	India	100%	100%
120	ReNew Sun Waves Private Limited	ReNew Solar Energy (Jharkhand Four) Private Limited	India	100%	100%
121	ReNew Sun Flash Private Limited	ReNew Solar Energy Private Limited	India	100%	100%
122	ReNew Sun Bright Private Limited	ReNew Solar Energy (Jharkhand Four) Private Limited	India	100%	100%
123	ReNew Sun Energy Private Limited	ReNew Solar Power Private Limited	India	100%	100%
124	Auxo Sunlight Private Limited^	ReNew Solar Power Private Limited	India	100%	100%
125	ReNew Services Private Limited	ReNew Power Private Limited	India	100%	100%
126	ReNew Sun Power Private Limited	ReNew Solar Power Private Limited	India	100%	100%
127	ReNew Mega Urja Private Limited	ReNew Solar Energy Private Limited	India	100%	100%
128	ReNew Mega Spark Private Limited	ReNew Solar Energy Private Limited	India	100%	100%
129	ReNew Mega Green Private Limited	ReNew Solar Energy Private Limited	India	100%	100%
130	ReNew Green Energy Private Limited	ReNew Solar Energy Private Limited	India	100%	100%
131	ReNew Green Power Private Limited	ReNew Solar Energy Private Limited	India	100%	100%
132	Greenyana Sunstream Private Limited	ReNew Solar Energy Private Limited	India	100%	100%
133	Renew Vyoman Power Private Limited	ReNew Power Private Limited	India	100%	100%
134	Renew Vyoman Energy Private Limited	ReNew Power Private Limited	India	100%	100%
135	Renew Vyan Shakti Private Limited	ReNew Power Private Limited	India	100%	100%
136	Shekhawati Solar Park Private Limited	ReNew Solar Energy Private Limited	India	100%	100%
137	Renew Green Solutions Private Limited	ReNew Solar Energy Private Limited	India	100%	100%
138	Renew Surya Roshni Private Limited	ReNew Solar Energy Private Limited	India	100%	100%
139	Renew Solar Urja Private Limited	ReNew Solar Power Private Limited	India	100%	100%
140	Renew Surya Ojas Private Limited	ReNew Solar Power Private Limited	India	100%	100%
141	Renew Surya Vihaan Private Limited	ReNew Solar Power Private Limited	India	100%	100%
142	ReNew Surya Jyoti Private Limited	ReNew Solar Energy Private Limited	India	100%	—
143	ReNew Surya Aayan Private Limited	ReNew Solar Power Private Limited	India	100%	—
144	ReNew Solar Vidhi Private Limited	ReNew Solar Power Private Limited	India	100%	—
145	ReNew Surya Pratap Private Limited	ReNew Solar Energy Private Limited	India	100%	—
146	ReNew Surya Alok Private Limited	ReNew Green Energy Solutions Private Limited	India	69%	—
147	Renew Surya Kiran Private Limited	ReNew Green Energy Solutions Private Limited	India	100%	—
148	ReNew Surya Tejas Private Limited	ReNew Green Energy Solutions Private Limited	India	100%	—
149	ReNew Surya Uday Private Limited	ReNew Green Energy Solutions Private Limited	India	100%	—
150	ReNew Solar Piyush Private Limited	ReNew Solar Power Private Limited	India	100%	—
151	ReNew Solar Stellar Private Limited	ReNew Solar Power Private Limited	India	100%	—
152	Regent Climate Connect Knowledge Solutions Private Limited	ReNew Power Private Limited	India	100%	—
153	ReNew Vayu Energy Private Limited	ReNew Power Private Limited	India	100%	—
154	ReNew Vayu Power Private Limited	ReNew Power Private Limited	India	100%	—
155	ReNew Photovolitics Private Limited (Formerly Known As ReNew Saksham Urja Private Limited)	ReNew Power Private Limited	India	100%	—
156	ReNew Pawan Shakti Private Limited	ReNew Power Private Limited	India	100%	—
157	ReNew Pawan Urja Private Limited	ReNew Power Private Limited	India	100%	—
158	ReNew Sunlight Energy Private Limited	ReNew Green Energy Solutions Private Limited	India	100%	—
159	ReNew Sun Renewables Private Limited	ReNew Green Energy Solutions Private Limited	India	100%	—
160	ReNew Sun Shakti Private Limited	ReNew Green Energy Solutions Private Limited	India	100%	—
161	ReNew Ravi Tejas Private Limited	ReNew Green Energy Solutions Private Limited	India	100%	—
162	Aalok Solarfarms Limited#	Ostro Energy Private Limited	India	75%	—
163	Abha Solarfarms Limited#	Ostro Energy Private Limited	India	75%	—
164	Heramba Renewables Limited#	Ostro Energy Private Limited	India	75%	—
165	Shreyas Solarfarms Limited#	Ostro Energy Private Limited	India	75%	—

^	These companies are also engaged in providing EPC services apart from generation of power through non-conventional and renewable energy sources.

$	These companies are engaged in providing services for operation and management

The remaining stakeholders in the respective entities have protective rights only. The Group has evaluated that it has ability to use its power over the entities which entitle the Group to exposure / rights to variable returns, hence these have been accounted as subsidiaries in these consolidated financial statements of the Group.

#	These entities were under joint control till 31 December 2020 and were accounted for as equity method till this date. With effect from 1 January 2021, control was established over these entities and have been consolidated in the Group’s financial statements as at 31 March 2021.

@	Adyah Solar Energy Private Limited, a wholly owned subsidiary was disposed on 15 February 2021.

D	ReNew Americas Inc. was dissolved in November 2020.

All Group companies listed above are engaged in generation of power through

non-conventional

and renewable energy sources except for following entities:

ReNew Wind Energy (Jamb) Private Limited which is purely engaged in providing EPC services.

ii)

ReNew Services Private Limited which is purely engaged in providing operation and maintenance services.

(b) Interests in entities under joint control accounted for under equity method


S.No	Name of companies	Investor entity	Country of incorporation		As at 31 March 2021		As at 31 March 2020
1	Aalok Solarfarms Limited	Ostro Energy Private Limited		India		—		75	%
2	Abha Solarfarms Limited	Ostro Energy Private Limited		India		—		75	%
3	Heramba Renewables Limited	Ostro Energy Private Limited		India		—		75	%
4	Shreyas Solarfarms Limited	Ostro Energy Private Limited		India		—		75	%

These companies ceased to exist as entities under joint control with effect from 1 January 2021 as control was established from this date. These four entities have been consolidated in the Group’s financial statements with effect from 1 January 2021.

(c)

Interests in joint operations*

S.No

Name of companies

Investor entity

Country of
incorporation

As at
31 March 2021

As at
31 March 2020

VG DTL Transmissions Projects Private Limited

ReNew Wind Energy (AP2) Private Limited

India

—

Also refer note 53(b

)

Related party disclosure

12 Months Ended

Mar. 31, 2021

Related party disclosure

44	Related party disclosure

Names of related parties and related party relationship

The names of related parties where control exists and / or with whom transactions have taken place during the year and description of relationship as identified by the management are:

I.	Entities with significant influence on the Company

GS Wyvern Holdings Limited

II.	Key management personnel or relatives of key management personnel

Mr. Sumant Sinha, Chairman and Managing Director

Mr. Ravi Seth, Chief Financial Officer (till 2 September 2019)

Mr. D Muthukumaran, Chief Financial Officer (from 3 September 2019)

Mr. Ashish Jain, Company Secretary and Compliance Officer

Mr. Parag Sharma, Chief Operating Officer and head of solar business (from 26 April 2018 till 1 November 2019)

Mr. Balram Mehta, President of wind business (till 8 November 2019)

Mr. Ravi Parmeshwar, Chief Human Resource Officer (till 8 November 2019)

Mrs. Vaishali Nigam Sinha, CSR and Communication Officer

III.	Entities owned or significantly influenced by key management personnel or their relatives:

Wisemore Advisory Private Limited

ReNew Foundation

IV.	Entities under joint control:

Prathamesh Solarfarms Limited (till 30 January 2019)

Heramba Renewables Limited (till 31 December 2020)*

Aalok Solarfarms Limited (till 31 December 2020)*

Shreyas Solarfarms Limited (till 31 December 2020)*

Abha Solarfarms Limited (till 31 December 2020)*

VG DTL Transmissions Private Limited

V.	Remuneration to key managerial personnel (KMP):


	For the year ended
	31 March 2021		31 March 2020		31 March 2019
Mr. Sumant Sinha		191		215		302
Mr. Ravi Seth		—		21		42
Mr. D Muthukumaran		100		88		—
Mr. Ashish Jain		7		7		6
Mr. Parag Sharma		—		17		37
Mr. Balram Mehta		—		30		37
Mr. Ravi Parmeshwar		—		17		19
Mrs. Vaishali Nigam Sinha		20		18		13

		318		413		456

Above remuneration includes short term employment benefits of INR 153 (31 March 2020: INR 219, 31 March 2019: INR 198), share based payment of INR 152 (31 March 2020: INR 179, 31 March 2019: INR 241) and gratuity and leave encashment expense of INR 13 (31 March 2020: INR 15, 31 March 2019: INR 17).

VI.	Details of transactions and balances with entities having significant influence on the Company


	GS Wyvern Holdings Limited
Transactions during the year end	31 March 2021		31 March 2020		31 March 2019
Compulsorily convertible preference shares issued		—		7,734		—
Interest expense on compulsorily convertible preference shares outstandin g		1,165		—		—


	GS Wyvern Holdings Limited
Balances as at year end	31 March 2021		31 March 2020
Compulsorily convertible preference shares outstanding		8,899		7,734

VII.	Transactions and balances with entities under joint control:


	Heramba Renewables Limited						Aalok Solarfarms Limited
Transactions during the year en d	31 March 2021		31 March 2020		31 March 2019		31 March 2021		31 March 2020		31 March 2019
Unsecured loan received		221		—		84		114		—		42
Unsecured loan repaid		4		11		15				7		5
Interest expense on unsecured loan received		6		5		1				—		—
Expenses incurred on behalf of the related party		23		0		—		11		—		0
Expenses incurred on behalf by the related party		—		—		—		0		—
Interest income on unsecured loan given		—		—		—		—		—		0
Income from management shared services		5		5		5		2		3		2
Income from operation and maintenance services		8		5		—		4		3		—
Interest income on compulsorily convertible debentures		17		21		—		8		12		—
Interest expense on unsecured loan received		—		—		—		3		2		0


Transactions during the year end	Shreyas Solarfarms Limited						Abha Solarfarms Limited
Transactions during the year end	31 March 2021		31 March 2020		31 March 2019		31 March 2021		31 March 2020		31 March 2019
Unsecured loan given		—		—		5		—		—		—
Unsecured loan received back		5		—		—		—		—		—
Unsecured loan received		222		—		84		105		43		—
Unsecured loan repaid		11		12		13		—		—		—
Expenses incurred on behalf of the related party		23		0		—		12		0		3
Expenses incurred on behalf by the related party		0		—		0		—		—		0
Interest income on unsecured loan given		0		0		—		—		—		—
Income from operation and maintenance services		8		5		—		4		3		—
Interest expense on unsecured loan received		6		5		1		4		3		—
Interest income on compulsorily convertible debentures		17		23		—		8		11		—
Income from management shared services		4		5		5		2		3		2


Transactions during the year end	Prathamesh Solarfarms Limited
Transactions during the year end	31 March 2021		31 March 2020		31 March 2019
Unsecured loan received		—		—		729
Unsecured loan repaid		—		—		156
Interest expense on unsecured loan received		—		—		10
Expenses incurred on behalf of the related party		—		—		3
Expenses incurred on behalf by the related party		—		—		0
Income from management shared services		—		—		13
Bank guarantee released from project lender(s)		—		—		193


Balances as at year end	Heramba Renewables Limited				Aalok Solarfarms Limited
Balances as at year end	31 March 2021		31 March 2020		31 March 2021		31 March 2020
Trade receivable		—		11		—		6
Recoverable from related party		—		3		—		—
Unsecured loan payable		—		58		—		30
Interest expense accrued on unsecured loan payable		—		5		—		—
Unbilled operation and maintenance revenue		—		6		—		3
Interest expense accrued on unsecured loan payable		—		—		—		3
Interest accrued on compulsorily convertible debentures		—		19		—		11
Corporate guarantee outstanding to project lender(s)		—		148		—		—
Recoverable from related party		—		—		—		3
Corporate guarantee outstanding to project lender(s)		—		—		—		74


Balances as at year end	Shreyas Solarfarms Limited				Abha Solarfarms Limited
Balances as at year end	31 March 2021		31 March 2020		31 March 2021		31 March 2020
Trade receivable		—		12		—		6
Trade payable		—		—		—		0
Unsecured loan payable		—		59		—		—
Unsecured loan receivable		—		5		—		—
Unbilled operation and maintenance revenue		—		6		—		3
Interest expense accrued on unsecured loan payable		—		5		—		3
Unsecured loan payable		—		—		—		43
Interest income accrued on unsecured loan receivable		—		0		—		—
Interest accrued on compulsorily convertible debentures		—		21		—		10
Recoverable from related party		—		3		—		6
Corporate guarantee outstanding to project lender(s)		—		148		—		74

VIII.

Transactions and balances with other related parties:


Transactions during the year end	ReNew Foundation
	31 March 2021		31 March 2020
Contribution for CSR activities		0		3


Transactions during the year end	Mr. D Muthukumaran
	31 March 2021		31 March 2020
Salary advance		11		—


Balances as at year end	Mr. D Muthukumaran
	31 March 2021		31 March 2020
Salary advance		11		—

Financial guarantees

During the year ended 31 March 2021, the Group has provided financial guarantee on the loans obtained by the shareholder, Wisemore Advisory Private Limited amounting to INR 4,900, being the maximum Group exposure, towards

non-convertible

debentures for a

7-month

period. In the event of default, the Group will have to repay the

non-convertible

debentures. The Group has not received any consideration for guarantee given. The Group has initially measured financial guarantee at fair value amounting INR 121 with corresponding amount recognised in equity as distributions to equity shareholder. According to Group’s policy amortisation is calculated on straight-line basis until maturity of the contract. Amortisation of INR 43 has been recognised under other income in the statement of profit or loss. The carrying amounts of the related financial guarantee contracts recognised in the consolidated financial statements is INR 78 as at 31 March 2021. The amount of loss allowance is lower than the fair value of financial guarantee initially recognised less cumulative amortisation, therefore no loss allowance was recognised in profit or loss for the financial guarantee contract. There were no financial guarantees given by Group in the previous year

Segment information

12 Months Ended

Mar. 31, 2021

Segment information

45	Segment information

The Chairman and Managing Director of the Company takes decisions in respect of allocation of resources and assesses the performance basis the reports/ information provided by functional heads and is thus considered to be the Chief Operating Decision Maker (CODM).

The Group discloses segment information in a manner consistent with internal reporting to Chairman and Managing Director. The Group entities have segments based on type of business operations. The reportable segments of Group under IFRS 8 are Wind Power and Solar Power which predominantly relate to generation and sale of electricity and construction activities. The Group entities does not operate in more than one geographical segment. The Group discloses in the segment information Earnings before interest, tax, depreciation and amortisation (EBITDA), where EBITDA is measured on the basis of profit/(loss) from continuing operations. The Group measures EBITDA as loss / (profit) after tax plus (a) income tax expense, (b) share in loss of jointly controlled entities, (c) finance costs and (d) depreciation and amortisation.

No operating segment has been aggregated to form the above reportable operating segments. Further, total assets and liabilities balance for each reportable segment is not reviewed by or provided to the CODM


	For the year ended 31 March 2021										For the year ended 31 March 2020										For the year ended 31 March 2019
Particulars	Wind power		Solar power		Unallocable			Total			Wind power		Solar power		Unallocable			Total			Wind power		Solar power		Unallocable			Total
Revenue from contracts with customers		29,411		18,737		39			48,187			31,800		16,598		14			48,412			29,480		13,637		27			43,144

Revenue from contracts with customers		29,411		18,737		39			48,187			31,800		16,598		14			48,412			29,480		13,637		27			43,144
Other income		4,198		1,030		1,076			6,304			3,066		594		1,231			4,891			3,701		636		421			4,758

Total income		33,609		19,767		1,115			54,491			34,866		17,192		1,245			53,303			33,181		14,273		448			47,902
Less: Employee benefit and other expenses		4,843		2,726		1,698			9,267			3,706		2,098		1,342			7,146			3,086		1,080		1,727			5,893

Total expenses		4,843		2,726		1,698			9,267			3,706		2,098		1,342			7,146			3,086		1,080		1,727			5,893

EBITDA		28,766		17,041		(583	)		45,224			31,160		15,094		(97	)		46,157			30,095		13,193		(1,279	)		42,009

Depreciation and amortisation expense									12,026										11,240										9,496
Finance costs									38,281										35,487										27,538

(Loss) / profit before share of profit of jointly controlled entities and tax									(5,083	)									(570	)									4,975

Share in loss of jointly controlled entities									(45	)									(53	)									(40	)
Income tax expense									(2,904	)									(2,158	)									(1,801	)

(Loss) / profit after tax									(8,032	)									(2,781	)									3,134

The revenues from four major customers for the year ended 31 March 2021 amounts to INR 23,175 (31 March 2020: four customers amounting to INR 23,312, 31 March 2019: four customers amounting to INR 19,970) each of which contributes more than 10% of the total revenue of the Group. Out of these, revenues from wind segment amounts to INR 14,676 (31 March 2020: INR 15,982, 31 March 2019: INR 13,770) and solar segment amounts to INR 8,499 (31 March 2020: INR 7,330, 31 March 2019: INR 6,200).

Fair values

12 Months Ended

Mar. 31, 2021

Fair values

46	Fair values

Set out below, is a comparison by class of the carrying amounts and fair value of the financial instruments of the group:


	As at 31 March 2021				As at 31 March 2020
	Carrying value		Fair value		Carrying value		Fair value
Financial assets
Measured at amortised cost
Security deposits		185		185		131		131
Bank deposits with remaining maturity for more than twelve months		2,999		2,999		142		142
Trade receivables		35,980		35,980		25,914		25,914
Cash and cash equivalents		20,679		20,679		13,089		13,089
Bank balances other than cash and cash equivalents		26,506		26,506		31,203		31,203
Advances recoverable		154		154		233		233
Deferred consideration receivable		1,936		1,936		—		—
Interest accrued on fixed deposits		394		394		607		607
Government grant receivable		1,161		1,161		1,749		1,749
Loans to related parties		11		11		5		5
Interest accrued on loans to related parties		—		—		0		0
Recoverable from related parties		—		—		15		15
Other current financial assets		52		52		114		114

Measured at FVTPL
Investment in unquoted compulsorily convertible debentures of entities under joint control		—		—		624		624

Measured at FVTOCI
Derivative instruments		2,691		2,691		8,718		8,718

Financial liabilities
Financial guarantee contracts		78		78		—		—
Measured at amortised cost
Non convertible debentures		100,584		101,725		45,211		45,211
Term loan from bank		51,157		51,455		53,924		53,924
Term loan from financial institutions		93,419		99,394		92,488		92,488
Compulsorily convertible debentures		809		809		553		553
Senior secured notes		92,924		98,308		128,160		128,160
Compulsorily convertible preference shares		26,697		26,697		23,200		23,200
Interest accrued but not due on borrowings		1,686		1,686		1,692		1,692
Interest accrued but not due on debentures		1,344		1,344		371		371
Capital creditors		9,001		9,001		8,926		8,926
Purchase consideration payable		191		191		272		272
Other payables		1		1		109		109
Interest-bearing loans and borrowings - Short term		10,643		10,643		12,148		12,148
Trade payables		3,245		3,245		3,733		3,733
Lease liabilities		2,112		2,112		1,646		1,646

Measured at FVTOCI
Derivative instruments		1,070		1,070		—		—

The management of the Group assessed that cash and cash equivalents, trade receivables, bank balances other than cash and cash equivalents, short term loans, trade payables, short term interest-bearing loans and borrowings, other current financial liabilities and other current financial assets approximate their carrying amounts largely due to the short-term maturities of these instruments

The following methods and assumptions were used to estimate the fair values:

Fair values of the Group’s term loans from banks, term loans from financial institutions, non convertible debentures, acceptances and senior secured notes including current maturities are determined by using Discounted Cash Flow (DCF) method using discount rate that reflects the issuer’s borrowing rate as at the end of the reporting period. They are classified as level 3 fair values in the fair value hierarchy due to the inclusion of unobservable inputs including own credit risk. The own

non-performance

risk as at 31 March 2021 and 2020 was assessed to be insignificant.

ii)

Fair values of the liability component of compulsory convertible preference shares and compulsory convertible debentures determined by using DCF method using discount rate that reflects the borrowing rate as at the end of the reporting period. They are classified as level 3 fair values in the fair value hierarchy due to the inclusion of unobservable inputs including own credit risk. The own

non-performance

risk as at 31 March 2021 and 2020 was assessed to be insignificant.

iii)

Fair values of the

non-current

trade receivables, security deposits given are determined by using DCF method using discount rate that reflects the lending rate as at the end of the reporting period. They are classified as level 3 fair values in fair value hierarchy due to inclusion of unobservable inputs including counterparty credit risk.

iv)

The Group enter into derivative financial instruments with various counterparties, principally financial institutions with investment grade credit ratings. Cross currency interest rate swaps are valued using valuation techniques, which employs the use of market observable inputs. The models incorporate various inputs including the credit quality of counterparties, foreign exchange spot and forward rates, yield curves of the currency, interest rate curves and forward rate curves of the underlying instrument. The changes in counterparty credit risk had no material effect on the hedge effectiveness assessment for derivatives designated in hedge relationships.

Fair Value Hierarchy

12 Months Ended

Mar. 31, 2021

Fair Value Hierarchy

47	Fair value hierarchy

The Group categorises assets and liabilities measured at fair value into one of three levels depending on the ability to observe inputs employed in their measurement which are described as follows:

•

Level 1—Quoted (unadjusted) market prices in active markets for identical assets or liabilities

•

Level 2—Valuation techniques for which the lowest level input that is significant to the fair value measurement is directly or indirectly observable

•

Level 3—Valuation techniques for which the lowest level input that is significant to the fair value measurement is unobservable

For assets and liabilities that are recognised at fair value on a recurring basis, the Group determines whether transfers have occurred between levels in the hierarchy by

re-assessing

categorisation (based on the lowest level input that is significant to the fair value measurement as a whole) at the end of each reporting period. There were no changes in the Group’s valuation processes, valuation techniques, and types of inputs used in the fair value measurements during the period.

There were no transfers between Level 1 and Level 2 fair value measurements during the period, and no transfers into or out of Level 3 fair value measurements during the year ended 31 March 2021. There were no changes in the Group’s valuation processes, valuation techniques, and types of inputs used in the fair value measurements during the period

The following table provides the fair value measurement hierarchy of the assets and liabilities of the Group:-


			As at 31 March 2021				As at 31 March 2020
Financial assets	Level		Carrying value		Fair value		Carrying value		Fair value
Measured at amortised cost*
Security deposits		Level 3		140		140		126		126
Trade receivables		Level 2		1,178		1,178		—		—
Bank deposits with remaining maturity for more than twelve months		Level 2		2,999		2,999		142		142
Measured at FVTPL
Investments, unquoted debt securities		Level 3		—		—		624		624
Measured at FVTOCI
Derivative instruments		Level 2		2,691		2,691		8,718		8,718


			31 March 2021				31 March 2020
Financial liabilities	Level		Carrying value		Fair value		Carrying value		Fair value
Financial guarantee contracts				78		78
Measured at amortised cost*
Non convertible debentures		Level 3		100,584		101,725		45,211		45,211
Compulsorily convertible debentures		Level 3		809		809		553		553
Term loan from bank		Level 3		51,157		51,455		53,924		53,924
Term loan from financial institutions		Level 3		93,419		99,394		92,488		92,488
Compulsorily convertible preference shares		Level 3		—		—		23,200		23,200
Senior secured notes		Level 3		92,924		92,924		128,160		128,160
Interest accrued but not due on debentures		Level 3		132		132		—		—
Measured at FVTOCI
Derivative instruments		Level 2		1,070		1,070		—		—

Assets / liabilities for which fair values are disclosed

Set out below are the fair value hierarchy, valuation techniques and inputs used as at 31 March 2021 and 2020:


Particulars	Level	Valuation technique	Inputs used
Financial assets measured at FVTPL

Investments, unquoted debt securities	Level 3	Discounted cash flow	Prevailing interest rates in market, future cash flows

Financial assets measured at FVTOCI

Derivative instruments	Level 2	Market value techniques	Forward foreign currency exchange rates, interest rates to discount future cash flows

Financial assets measured at amortised cost

Security deposits	Level 3	Discounted cash flow	Prevailing interest rates in market, future cash flows

Trade receivables	Level 2	Discounted cash flow	Prevailing interest rates in market, future cash flows

Bank deposits with remaining maturity for more than twelve months	Level 2	Market value techniques	Prevailing interest rates in market, future cash flows

Financial liabilities measured at FVTOCI

Derivative instruments	Level 2	Market value techniques	Forward foreign currency exchange rates, interest rates to discount future cash flows


Particulars	Level	Valuation technique	Inputs used

Financial liabilities measured at FVTPL

Financial guarantee contracts	Level 3	Discounted cash flow	Prevailing interest rates in market, future cash flows

Financial liabilities measured at amortised cost

Non convertible debentures	Level 3	Discounted cash flow	Prevailing interest rates in market, future cash flows

Compulsorily convertible debentures	Level 3	Discounted cash flow	Prevailing interest rates in market, future cash flows

Term loan from bank	Level 3	Discounted cash flow	Prevailing interest rates in market, future cash flows

Term loan from financial institutions	Level 3	Discounted cash flow	Prevailing interest rates in market, future cash flows

Senior secured notes	Level 3	Discounted cash flow	Prevailing interest rates in market, future cash flows

Compulsorily convertible preference shares	Level 3	Discounted cash flow	Prevailing interest rates in market, future cash flows

Interest accrued but not due on debentures	Level 3	Discounted cash flow	Prevailing interest rates in market, future cash flows

Financial risk management objectives and policies

12 Months Ended

Mar. 31, 2021

Financial risk management objectives and policies

48	Financial risk management objectives and policies

The financial liabilities comprise loans and borrowings, derivative liabilities, trade payable and other financial liabilities.

The main purpose of these financial liabilities is to finance the Group’s operations. The Group’s principal financial assets include loans, derivative assets, trade receivables, cash and cash equivalents and other financial assets. The Group is exposed to market risk, credit risk and liquidity risk. The Group’s senior management oversees the management of these risks. The Group’s senior management is supported by various sub committees that advises on financial risks and the appropriate financial risk governance framework for the Group. These committees provide assurance to the Group’s senior management that the Group’s financial risk activities are governed by appropriate policies and procedure and that financial risks are identified, measured and managed in accordance with the Group’s policies and risk objectives. The Board of Directors reviews and agrees policies for managing each of these risks, which are summarised below:

Market risk

Market risk is the risk that the Group’s assets and liabilities will be exposed to due to a change in market prices that determine the valuation of these financial instruments. Market risk comprises three types of risk: interest rate risk, currency risk and other price risk. Financial instruments affected by market risk include loans and borrowings, deposits, investments and derivative financial instruments.

The sensitivity analysis in the following sections relate to the position as at 31 March 2021, 2020 and 2019. The sensitivity analyses have been prepared on the basis that the amount of net debt, the ratio of fixed to floating interest rates of the debt and derivatives and the proportion of financial instruments in foreign currencies are all constant and on the basis of hedge designations in place as at 31 March 2021.

(i) Interest rate risk

Interest rate risk is the risk that the fair value of future cash flows of a financial instrument will fluctuate because of changes in market interest rates. The Group is exposed to interest rate risk primarily from the external borrowings that are used to finance their operations. In case of external commercial borrowings (ECB) and buyers credit the Group believes that the exposure of Group to changes in market interest rates is insignificant as the respective companies manage the risk by hedging the changes in the market interest rates through cross currency interest rate swaps. The Group also monitors the changes in interest rates and actively re finances its debt obligations to achieve an optimal interest rate exposure.

Interest rate sensitivity

The following table demonstrates the sensitivity to a reasonable possible change in interest rates on financial liabilities, i.e. floating interest rate borrowings in INR and USD. Interest rate sensitivity has been calculated for borrowings with floating rate of Interest. For borrowings with fixed rate of interest sensitivity disclosure has not been made. With all other variables held constant, the Group’s profit before tax is affected through the impact on financial liabilities, as follows:

For the year ended

31 March 2021

31 March 2020

31 March 2019

Increase / decrease

Effect on profit

Increase / decrease

Effect on profit

Increase / decrease

Effect on profit

in basis points

before tax

in basis points

before tax

in basis points

before tax

INR

+/(-) 50

(-)/+ 646

+/(-) 50

(-)/+ 615

+/(-) 50

(-)/+ 499

US dollar

—

+/(-) 60

(-)/+ 3

The assumed movement in basis points for the interest rate sensitivity analysis is based on the currently observable market environment. Though there is exposure on account of Interest rate movement as shown above but the Group minimises the foreign currency (US dollar) interest rate exposure through derivatives and INR interest rate exposure through

re-financing.

(ii) Foreign currency risk

Foreign currency risk is the risk that the fair value or future cash flows of an exposure will fluctuate because of changes in foreign exchange rates. The Group is exposed to foreign currency risk arising from imports of goods in US dollars. The Group hedges its exposure to fluctuations on the translation into INR of its buyer’s/supplier’s credit by using foreign currency swaps and forward contracts. The Group has followed a conservative approach for hedging the foreign currency risk so as to not use complex forex derivatives and foreign currency loan. The Group also monitors that the hedges do not exceed the underlying foreign currency exposure. The Group does not undertake any speculative transaction.

Foreign currency sensitivity

The following tables demonstrate the sensitivity to a reasonably possible change in USD and INR exchange rates, with all other variables held constant. The impact on the group’s profit before tax is due to changes in the fair value of monetary liabilities comprising of buyer’s/supplier’s credit in US dollars. The impact on the group’s

pre-tax

equity is due to changes in the fair value of cross-currency interest-rate swaps (CCIRS) designated as cash flow hedges. The group’s exposure to foreign currency changes for all other currencies is not material.


	For the year ended
	31 March 2021					31 March 2020					31 March 2019
Change in USD rate		5	%	- 5	%		5	%	- 5	%		5	%	- 5	%
Effect on profit before tax		—		—			—		—			-23		23

Credit risk

Credit risk is the risk that the power procurer will not meet their obligations under a financial instrument or customer contract, leading to a financial loss. The Group is exposed to credit risk from their operating activities (primarily trade receivables) and from its financing activities, including deposits with banks and financial institutions and other financial instruments. The credit risk exposure is insignificant given the fact that substantially whole of the revenues are from state utilities/government entities. The Group only deals with parties which has good credit rating / worthiness given by external rating agencies or based on the Group’s internal assessment.

Further the group sought to reduce counterparty credit risk under long-term contracts in part by entering into power sales contracts with utilities or other customers of strong credit quality and we monitor their credit quality on an ongoing basis.

The maximum credit exposure to credit risk for the components of the statement of financial position at 31 March 2021 and 2020 is the carrying amount of all the financial assets except for financial guarantees. The Group’s maximum exposure relating to financial guarantees is disclosed in Note 44 and the liquidity table below.

(i) Trade receivables

Customer credit risk is managed basis established policies of Group, procedures and controls relating to customer credit risk management. Outstanding customer receivables are regularly monitored. The Group does not hold collateral as security. The group has majorly state utilities / government entities as its customers with high credit worthiness and therefore the group does not see any significant risk related to credit.

The trade receivable balances of the Group are evenly spread over customers.

The credit quality of the customers is evaluated based on their credit ratings and other publicly available data.

The Group has established a provision matrix that is based on its historical credit loss experience, adjusted for forward-looking factors specific to the debtors and the economic environment and impairment analysis is performed at each reporting date to measure expected credit losses. The calculation reflects the probability-weighted outcome, the time value of money and reasonable and supportable information that is available at the reporting date about past events, current conditions and forecasts of future economic conditions.

Set out below is the information about the credit risk exposure on the Group’s trade receivables using a provision matrix:

As at 31 March 2021


	Trade receivables (days past due)
	0 -6 months*		6 -12 months		12 -18 months		> 18 months		Total
Gross carrying amount		18,621		9,308		1,425		7,188		36,542
Expected credit loss		233		177		51		101		562

As at 31 March 2020

	Trade receivables (days past due)
	0 -6 months*		6 -12 months		12 -18 months		> 18 months		Total
Gross carrying amount		16,635		7,383		1,572		500		26,090
Expected credit loss		78		72		16		10		176

included trade receivables which are not yet due.

(ii) Financial instruments and credit risk

Credit risk from balances with banks is managed by Group’s treasury department. Investments, in the form of fixed deposits, loans and other investments, of surplus funds are made only with banks and within credit limits assigned to each counterparty. Counterparty credit limits are reviewed on an annual basis by the Group, and may be updated throughout the year subject to approval of group’s finance committee. The limits are set to minimise the concentration of risks and therefore mitigate financial loss through counterparty’s potential failure to make payments.

(iii) Other financial assets

Credit risk from other financial assets including loans is managed basis established policies of Group, procedures and controls relating to customer credit risk management. Outstanding receivables are regularly monitored. The Group does not hold collateral as security

Liquidity risk

Liquidity risk is the risk that the Group will encounter in meeting the obligations associated with its financial liabilities that are settled by delivering cash or another financial asset. The approach of the Group to manage liquidity is to ensure, as far as possible, that these will have sufficient liquidity to meet their respective liabilities when they are due, under both normal and stressed conditions, without incurring unacceptable losses or risk damage to their reputation. The Group assessed the concentration of risk with respect to refinancing its debt and concluded it to be low. The Group has access to a sufficient variety of sources of funding and debt maturing within 12 months can be rolled over with existing lenders.

The Group rely mainly on long-term debt obligations to fund their construction activities. To the extent available at acceptable terms, utilised

non-recourse

debt to fund a significant portion of the capital expenditures and investments required to construct and acquire our wind and solar power plants and related assets. The Group’s

non-recourse

financing is designed to limit default risk and is a combination of fixed and variable interest rate instruments. In addition, the debt is typically denominated in the currency that matches the currency of the revenue expected to be generated from the benefiting project, thereby reducing currency risk. The majority of

non-recourse

debt is funded by banks and financial institutions, with debt capacity supplemented by unsecured loan from related party

The table below summarises the maturity profile of financial liabilities of group based on contractual undiscounted payments:


As at 31 March 2021	On demand		Less than 3 months		3 to 12 months		1 to 5 years		> 5 years		Total
Borrowings (other than CCPS)#
Non convertible debentures (secured)*		—		—		—		71,507		48,560		120,067
Compulsorily convertible debentures*		—		—		—		349		700		1,049
Term loan from banks*		—		—		—		26,929		45,804		72,733
Loans from financial institutions*		—		—		—		46,968		106,625		153,593
Senior secured notes*		—		—		—		85,989		21,242		107,231
Short term interest-bearing loans and borrowings
Acceptances (secured)		—		1,788		381		—		—		2,169
Buyer’s / supplier’s credit (secured)		—		—		2,962		—		—		2,962
Working capital term loan (secured)		—		175		5,350		—		—		5,525
Other financial liabilities
Lease liabilities		—		90		240		878		5,332		6,540
Current maturities of long term interest-bearing loans and borrowings*		11,088		9,960		36,422		—		—		57,470
Interest accrued but not due on borrowings		—		1,116		612		—		—		1,728
Interest accrued but not due on debentures		—		894		275		—		132		1,301
Capital creditors		—		9,001		—		—		—		9,001
Purchase consideration payable		—		191		—		—		—		191
Financial guarantee contracts@		4,900		—		—		—		—		4,900
Trade payables
Trade payables		—		3,245		—		—		—		3,245


As at 31 March 2020	On demand		Less than 3 months		3 to 12 months		1 to 5 years		> 5 years		Total
Borrowings (other than CCPS)#
Non convertible debentures (secured)*		—		—		—		35,647		18,903		54,550
Compulsorily convertible debentures*		—		—		65		261		745		1,071
Term loan from banks*		—		—		—		26,152		52,337		78,489
Loans from financial institutions*		—		—		—		53,874		117,070		170,944
Senior secured notes*		—		—		—		130,525		23,088		153,613
Short term interest-bearing loans and borrowings
Acceptances (secured)		—		293		310		—		—		603
Loan from related party (unsecured)		190		—		—		—		—		190
Buyer’s / supplier’s credit (secured)		—		583		3,927		—		—		4,510
Working capital term loan (secured)		—		5,630		—		—		—		5,630
Loan from bank (secured)		—		1,230		—		—		—		1,230
Other financial liabilities
Lease liabilities		—		113		148		768		3,310		4,339
Current maturities of long term interest-bearing loans and borrowings*		2,916		10,983		37,001		—		—		50,900
Interest accrued but not due on borrowings		—		537		1,156		—		—		1,693
Interest accrued but not due on debentures		—		242		129		—		—		371
Capital creditors		—		8,926		—		—		—		8,926
Purchase consideration payable		—		272		—		—		—		272
Trade payables
Trade payables		43		3,690		—		—		—		3,733

Including future interest payments.

The Company has issued Compulsorily convertible preference shares, which are mandatorily convertible into equity shares. These CCPS are excluded from maturity profile of financial liabilities since there is no cash outflow involved.

Based on the maximum amount that can be called for under the financial guarantee contracts.

The Group has undrawn loan facilities amounting to INR 22,111 as at 31 March 2021 (31 March 2020: INR 52,148).

Capital management

12 Months Ended

Mar. 31, 2021

Capital management

49	Capital management

For the purpose of the capital management, capital includes issued equity capital, compulsorily convertible debentures, compulsorily convertible preference shares, Securities premium and all other equity reserves attributable to the equity holders of the parent. The primary objective of the Group’s management is to maximise the shareholder value.

The Group manages its capital structure and makes adjustments in light of changes in economic conditions and the requirements of the financial covenants.

To maintain or adjust the capital structure, the Group may adjust the dividend payment to shareholders, return capital to shareholders or issue new shares. The Group monitor capital using a gearing ratio, which is net debt divided by total capital plus net debt. The Group includes within net debt, interest bearing loans and borrowings and other payables, less cash and short-term deposits. Group systematically evaluates opportunities for managing its assets including that of buying new assets, partially or entirely sell existing assets and potential new joint ventures. Crystallisation of any such opportunity shall help the Group in improving the overall portfolio of assets, cash flow management and shareholder returns.

The policy of the Group is to keep the gearing ratio of the power project to 3:1 during the construction phase and aim to enhance it to 4:1 post the construction phase. This is in line with the industry standard ratio. The current gearing ratios of the various projects in the Group is between 3:1 to 4:1. ‘In order to achieve this overall objective, the capital management of the Group, amongst other things, aims to ensure that they meet financial covenants attached to the interest-bearing loans and borrowings that define capital structure requirements.

For all long-term loan arrangements, the Group has complied with the debt covenants except for long-term loan arrangements amounting to INR 10,341 as at 31 March 2021 (31 March 2020: INR 2,916), where the Group could not meet covenants with the effect that the liability became payable on demand. The Group has classified the liability as current. Further, for the March 2021 arrangements, the Group has subsequently received waiver of INR 6,446 from the lender in April 2021 and has applied for waiver to lenders for INR 3,664. For the March 2020 arrangement, the Group had subsequently received waiver from the lender and this loan was fully repaid in November 2020 (refer note 21).

No changes were made in the objectives, policies or processes for managing capital during the years ended 31 March 2021, 2020 and 2019.

Commitments, liabilities and contingencies

12 Months Ended

Mar. 31, 2021

Commitments, liabilities and contingencies

50	Commitments, liabilities and contingencies (to the extent not provided for)

(i)

Contingent liabilities


Description	As at 31 March 2021		As at 31 March 2020
Contingent liabilities on account of liquidated damages for delay in project commissioning. The management believes that any amount of liquidated damages to be levied by customer shall be entirely reimbursable from capital vendors of respective projects and from purchase consideration pending to be paid as per the contract clauses, accordingly no amount is provided in consolidated financial statements as at 31 March 2021 and 2020.		917		954
VAT, GST, service tax, entry tax matters #		91		5
Income tax disallowances / demands under litigation #@		40		23

The Group is contesting demands of direct and indirect taxes and the management, including its tax advisors, believe that its positions will likely be upheld in the appellate process. No tax expense has been accrued in the financial statements for the demands raised.

There is an additional disallowance/addition to returned income for INR 440 of the Parent under section 37 of the Income Tax Act, 1961 for share based payment expenses. The management believes that any unfavourable judgement will not have any impact as this will be eligible for set off against unabsorbed losses / depreciation. Accordingly, no amount has been provided in consolidated financial statements as at 31 March 2021 and 2020. Also, since no deferred tax asset has been created on unabsorbed losses and depreciation, therefore, there will be no impact on the consolidated statement of profit or loss in case of unfavourable outcome.

(ii)

Commitments

Estimated amount of contracts remaining to be executed on capital account and not provided for

As at 31 March 2021, the Group has capital commitment (net of advances) pertaining to commissioning of wind and solar energy projects of INR 55,483 (31 March 2020: INR 11,955).

Guarantees

The Group has obtained guarantees from financial institutions as a part of the bidding process for establishing renewable projects. Further, the Group issues irrevocable performance bank guarantees in relation to its obligation towards construction and transmission infrastructure of renewable power projects plants as required by the PPA and such outstanding guarantees are INR 13,218 as at 31 March 2021 (31 March 2020: INR 15,046).

The terms of the PPAs provide for the delivery of a minimum quantum of electricity at fixed prices

Legal matters

12 Months Ended

Mar. 31, 2021

Legal matters

51	Legal matters

(a)

Dispute with Southern Power Distribution Company of Andhra Pradesh Limited

Certain subsidiaries companies (AP entities) have entered into long-term PPAs having a cumulative capacity of 777 MWs (wind and solar energy projects) with Southern Power Distribution Company of Andhra Pradesh Limited i.e. the distribution company of Andhra Pradesh (APDISCOM). These PPAs have a fixed rate per unit of electricity for the

25-year

term. With regard to aforementioned PPAs, certain litigations as described below are currently underway:

a. In terms of the Generation Based Incentive (GBI) scheme of the Ministry of Renewable Energy (MNRE), the AP entities accrue income based on units of power supplied under the aforementioned PPAs. Andhra Pradesh Electricity Regulatory Commission (APERC) vide its order in July 2018 allowed APDISCOMS to interpret the Andhra Pradesh Electricity Regulatory Commission (Terms and Conditions for Tariff Determination for Wind Power Projects) Regulations, 2015 (Regulations) in a manner to treat GBI as a pass through in the tariff.

The AP entities filed writ petition before the Andhra Pradesh High Court (AP High Court) challenging the vires of the regulation and the order by APERC and were granted an interim stay order in August 2018. As at 31 December 2020, the cumulative amount recoverable from the APDISCOM pertaining to period from February 2017 till July 2018, included in trade receivables amounts to INR 1,004 million. The AP entities have filed an interim application in AP High Court seeking payment of amount wrongfully deducted by the APDISCOM.

The management basis legal opinion obtained by it, believes that the GBI benefit is over and above the applicable tariffs and the APERC does not have jurisdiction to interfere with the intent of GBI scheme and therefore the outstanding amount is recoverable and hence no adjustment has been made in the consolidated financial statements in this regard.

b. The Government of Andhra Pradesh (GoAP) issued an order (GO) dated 1 July 2019 constituting a High-Level Negotiation Committee (HLNC) for review and negotiation of tariff for wind and solar energy projects in the state of Andhra Pradesh. Pursuant to the GO, APDISCOM issued letters dated 11 July 2019 and 12 July 2019 to the AP entities, requesting for revision of tariffs entered into in PPAs. The AP entities filed a writ petition on 23 July 2019 before the AP High Court challenging the GO and the said letters issued by APDISCOM for renegotiation of tariffs. The AP High Court issued its order dated 24 September 2019 enumerating the following:

i. Writ petition is allowed, and both GO and the subsequent letters are set aside.

ii. Further, APDISCOM were instructed to honour pending and future bills and pay the same at the interim rate of INR 2.43 per unit till determination of O.P. No. 17 of 2018 pending before APERC

iii. APERC to

dispose-off

the case within a time frame of six months.

The AP Entities have filed a Writ Appeal before the division bench of the AP High Court challenging the jurisdiction of APERC in entertaining O.P. No. 17 of 2018. Parallelly, the AP Entities have filed another Writ Appeal before the division bench of the AP High Court challenging AP High Court’s direction to the APDISCOM to pay tariff at interim rate till determination of OP No. 17 of 2018 by APERC.

Thereafter, certain power generating companies other than ReNew Group have filed petitions under Article 139 of the Constitution of India before the Supreme Court seeking transfer of the proceedings pending before the Division Bench of the High Court, and for adjudication of the same by the Supreme Court.

APDISCOM has also filed a Special Leave Petition (SLP) in the Supreme Court in October 2020 against the Judgment and order dated 19 December 2019 in I.A. No. 9 of 2019 in W.P. No. 9876 of 2019 of another power generating company in the industry, which modified the Order dated 24 September 2019, passed by Single Judge of AP High Court and directed APDISCOM to make payments at the rate mentioned in PPAs. The AP Entities through its Holding Company, ReNew Power Private Limited, has filed an impleadment application in the SLP apprehending that any order or observation of the Supreme Court may have an adverse impact on the Order dated 24 September 2019 and W.A. No. 6 of 2020 and batch pending before Division Bench of the AP High Court.

The AP entities have a net block of INR 50,154 as at 31 March 2021 (31 March 2020: INR 49,617) and have recognised a revenue of INR 6,680 for the year ended 31 March 2021 (31 March 2020: INR 6,911, 31 March 2019: INR 8,765) and have a trade receivable balance of INR 14,167 as at 31 March 2021 (31 March 2020: INR 8,945, 31 March 2019: INR 4,420) from sale of electricity against such PPAs [including an amount of INR 1,004 for GBI receivable as explained in part (a) to the note].

The management basis legal opinion obtained by it, believes that it has strong merits in the case and the final order would be in its favour and hence no adjustment has been made in the consolidated financial statements for provision of impairment on

non-financial

assets.

(b)

Dispute with Karnataka Electricity Regulatory Commission

Distribution companies of the state of Karnataka issued demand notices to captive users (customers of certain Group’s subsidiaries) and to the respective captive plants (hereinafter refer to as the “SPVs”), alleging that captive users had not consumed energy in proportion to their respective shareholding in the SPVs, thereby failing to maintain their Captive Status in accordance with Rule 3 of the Electricity Rules, 2005, and consequently, were liable to pay cross subsidy surcharge and differential between rate of electricity tax applicable on the energy consumed in the entire year.

SPVs had deposited a sum of INR 114 (31 March 2020: INR 114) under protest against the demand raised by distribution companies amounting INR 298 (31 March 2020: INR 298) in relation to the demand notices up to financial year ended 31 March 2018. Thereafter, the SPVs had filed petitions before the Karnataka Electricity Regulatory Commission (KERC) contesting these demands.

KERC had granted interim relief and stayed the demand notice and disconnection by the distribution companies till final adjudication of the petitions. The amount paid under protest has been accounted for as recoverable and disclosed under head “Other current assets” in these financial statements.

Apart from above, a sum of INR 180 has been demanded by distribution companies from some of the captive users of the SPVs towards energy supplied till 31 March 2021, alleging that the captive user had not consumed energy in proportion to its respective shareholding in the SPVs. The SPVs have filed a writ petitions in July, 2019 and August 2020 before the High Court of Karnataka challenging such demands and seeking their quashing. The High Court, vide Orders dated 18 July 2019, 18 December 2019, 18 September 2020 and 6 October 2020, has directed that no precipitative action shall be taken on these demand notices till final adjudication of the petitions.

The SPVs, based on legal advice obtained, believes that there are merits in its position and that the demand raised by distribution companies would be rescinded by relevant legal authorities and hence no adjustment has been made in the consolidated financial statements in this regard.

(c)

Order of the Supreme Court of India to underground high-tension power lines

In earlier years, a petition in public interest (the “Writ Petition”) was filed before the Supreme Court of India to seek directions to save two protected species of birds in the state of Rajasthan and Gujarat (the ‘Birds’) stating that these Birds collide with overhead transmission lines and suffer injuries or die. Subsequent to the year end, on 19 April 2021, the Supreme Court has ordered (the “Order”) for all existing and future powerlines to be undergrounded, subject to feasibility in case of high-tension power lines. As at 31 March 2021, the Group has a total of 3,436.4 MW of power projects, of which 978.8 MW are commissioned and projects with 2,448.6 MW are under development in the area impacted by the Order.

The Group along with other companies in the industry affected by the Order are in the process of evaluating its legality and are contemplating filing an application to challenge or seek appropriate directions, clarifications of the Order. Further, management, basis legal opinion obtained by it believes that the additional cost that will be incurred by the Group shall be recovered from customers under respective PPAs through provisions relating to change in law and force majeure and hence no financial implication is likely to devolve on the Group. Also, under the current circumstances, owing to COVID—19 related lockdowns, it is impracticable to assess the same on the ground or to get the feasibility studies carried out.

Pending the evaluation of future legal course of action, impracticability to assess the operational and financial impact under the current scenario and potential recovery of cost from customers, no effect has been given in these consolidated financial statements.

Hedging activities and derivatives

12 Months Ended

Mar. 31, 2021

Hedging activities and derivatives

52	Hedging activities and derivatives

Derivatives designated as hedging instruments

The Group uses certain types of derivative financial instruments (viz. forwards contracts, swaps, call options and call spreads) to manage / mitigate its exposure to foreign exchange and interest risk. Further, the Group designates such derivative financial instruments (or its components) as hedging instruments for hedging the exchange rate fluctuation and interest risk attributable to either a recognised item or a highly probable forecast transaction (‘Cash flow hedge’).

The effective portion of changes in the fair value of derivative financial instruments (or its components) that are designated and qualify as cash flow hedges, are recognised in the other comprehensive income and held in hedge reserve—a component of equity. Any gains / (losses) relating to the ineffective portion, are recognised immediately in the statement of profit or loss within other income / other expenses. The amounts accumulated in equity for highly probable forecast transaction are added to carrying value of non financial asset or non financial liability as basis adjustment, other amounts accumulated in equity are

re-classified

to the statement of profit or loss in the years when the hedged item affects profit or loss.

At any point of time, when a forecast transaction is no longer expected to occur, the cumulative gains / (losses) that were reported in equity is immediately transferred to the statement of profit or loss within other income / other expenses.

Cash flow hedges

Hedge has been taken against exposure to foreign currency risk and variable interest outflow on external commercial borrowings, buyer’s credit, foreign letter of credits and highly probable forecast transactions. Terms of the derivative contracts and their respective impact on OCI and statement of profit or loss is as below:-

- Buyers credit / suppliers credit (included in long term / short term interest-bearing loans and borrowings)

Pay fixed INR and receive USD and pay fixed interest at 2.27% to 2.51% per annum.

- Loan (included in long term interest-bearing loans and borrowings)

Pay fixed INR and receive USD and pay fixed interest at 3.44% to 10.19% per annum and receive a variable interest at 6 months LIBOR plus 2.41% per annum on the notional amount.

- Senior secured notes (included in long term interest-bearing loans and borrowings)

Pay fixed INR and receive USD and pay fixed interest in INR at 6.34% to 10.74% per annum and receive a fixed interest in USD at 5.88% to 6.67% per annum on the notional amount.

The cash flow hedges through CCS of USD 360 (31 March 2020: USD 301), COS of USD 1,206 (31 March 2020: USD 119), POS of USD 64 (31 March 2020: USD Nil) and Call Spread of USD 299 (31 March 2020: USD 299), foreign currency call options of USD 855 (31 March 2020: USD 952) and foreign currency forwards of USD 1,016 (31 March 2020: USD 574) and EUR 2 (31 March 2020: EUR Nil) outstanding at the year ended 31 March 2021 were assessed to be highly effective and a mark to market gain of INR 4,884 (31 March 2020: INR 516, 31 March 2019: INR 705) with a deferred tax liability of INR 144 (31 March 2020: INR 1,675, 31 March 2019: INR 181) is included in OCI.

All of the cash flow hedges were fully effective during the years ended 31 March 2021, 2020 and 2019.

All of the underlying foreign currency and floating interest rate exposure is fully hedged with cash flow hedges as at 31 March 2021 and 2020.

The expiry dates of cash flow hedge deals range between 15 April 2021 to 15 January 2027.

Foreign currency and interest rate risk

Forward contracts, swaps, call option and call spreads measured at FVTOCI are designated as hedging instruments in cash flow hedges of interest and principal payments in USD / CNH

31 March 2021

31 March 2020

Assets

Liabilities

Assets

Liabilities

Derivative contracts designated as hedging instruments

2,691

1,070

8,718

—


	For the year ended
Hedge reserve movement	31 March 2021			31 March 2020			31 March 2019
a) Cash flow hedge reserve
Opening balance (after non-controlling interest)		(300	)		(429	)		(271	)
Gain / (loss) recognised on cash flow hedges		(5,104	)		1,373			(760.03	)
(Gain) / loss reclassified to profit or loss (under head finance costs)		(58	)		8			(5	)
(Gain) / loss reclassified to non financial assets or liabilities as basis adjustment (under head property, plant and equipment)		(9	)		559			230.18
(Gain) / loss reclassified to profit or loss as hedged future cash flows are no longer expected to occur		106			280			295.21
Income tax relating on cash flow hedges		1,365			(2,157	)		61

Closing balance		(4,000	)		(366	)		(450	)
Less: Non-controlling interest movement		(61	)		66			21

Closing balance (after non-controlling interest)		(4,061	)		(300	)		(429	)

b) Cost of hedge reserve on cash flow hedges
Opening balance (after non-controlling interest)		(785.25	)		(82	)		—
Effective portion of changes in fair value		(2,353.51	)		(2,119	)		(178	)
Amount reclassified to profit or loss as option premium amortisation (under head finance costs)		1,772.73			1,119			69
Amount transferred to property, plant and equipment		42.00			—			—
Tax effect		166.79			301			31

Closing balance		(1,157	)		(781	)		(78	)
Less: Non-controlling interest movement		(4	)		(4	)		(4	)

Closing balance (after non-controlling interest)		(1,161	)		(785	)		(82	)

Total Hedge reserve movement (a+b)
Opening balance (after non-controlling interest)		(1,085	)		(511	)		(271	)
OCI for the year		(4,072	)		(636	)		(258	)
Attributable to non-controlling interests		(65	)		62			17

Closing balance (after non-controlling interest)		(5,222	)		(1,085	)		(511	)

(a) Investments in entities under joint control

12 Months Ended

Mar. 31, 2021

(a) Investments in entities under joint control

53	(a) Investments in entities under joint control

The Group also has investment in individually immaterial entities under joint control that are accounted using equity method.


Company name	Opening balance		Addition during the year		Share in loss of jointly controlled entity			Acquired during the year*			Closing balance
Abha Solarfarms Limited
For the year ended 31 March 2021		89		—		(7	)		(82	)		—
For the year ended 31 March 2020		84		15		(10	)		—			89
For the year ended 31 March 2019		88		—		(4	)		—			84
Heramba Renewables Limited
For the year ended 31 March 2021		170		—		(14	)		(156	)		—
For the year ended 31 March 2020		156		30		(16	)		—			170
For the year ended 31 March 2019		161		—		(4	)		—			157
Aalok Solarfarms Limited
For the year ended 31 March 2021		91		—		(7	)		(84	)		—
For the year ended 31 March 2020		86		14		(9	)		—			91
For the year ended 31 March 2019		89		—		(4	)		—			85
Shreyas Solarfarms Limited
For the year ended 31 March 2021		174		—		(17	)		(157	)		—
For the year ended 31 March 2020		163		29		(18	)		—			174
For the year ended 31 March 2019		170		—		(7	)		—			163
Prathamesh Solarfarms Limited
For the year ended 31 March 2019		492		—		(21	)		(471	)		—

Refer note 54

(b) Joint operations

On date 17 September 2020, the Group through a subsidiary company namely ReNew Wind Energy (AP2) Private Limited has acquired 50% interest in a joint arrangement called VG DTL Transmissions Private Limited which was set up together with KP Energy Limited to develop evacuation facility for the SECI III project in the state of Gujarat.

The country of incorporation and principal place of business of the joint operation is in India. The interest in joint operation is not significant to the Group

Business combination

12 Months Ended

Mar. 31, 2021

Transaction With non controlling Interests [Abstract]

Business combination

54	Business combination

(a)

The Group have acquired unlisted companies based in India and carrying out business activities relating to generation of power through

non-conventional

and renewable energy sources, in exchange for cash consideration. The Group acquired these entities because management believes that the acquisition would enable the group to strengthen its position in renewable energy sector. Below are the details of the acquisitions:

i) Acquisition of entities which were earlier under joint control

The below listed entities were under joint control till 31 December 2020 and were accounted for under equity method. The Group held 75% stake in these entities till 31 December 2020. Due to amendments to the shareholder’s agreements, these companies ceased to be entities under joint control with effect from 1 January 2021 as control was established from this date. However, no additional stake has been acquired. These four entities have been consolidated in the Group’s financial statements with effect from 1 January 2021. These entities are involved in the business of generation of power through renewable energy sources considered as a single Group of CGU by the Group and are a part of Solar Power reporting segment.

Aalok Solarfarms Limited

Abha Solarfarms Limited

Heramba Renewables Limited

Shreyas Solarfarms Limited

The acquisition date fair value of the equity interest held by the Group immediately before the acquisition date was INR 507. The Group has recognised INR 27 gain as a result of remeasurement to fair value the equity interest in the entity. The fair value gain has been included in “other income” of the Group.

ii) Regent Climate Connect Knowledge Solutions Private Limited

The Group has acquired 100% stake in an unlisted company based in India on 28 August 2020, carrying out business activities relating to consultancy on environment for industries, business units, civil administration and public and local authorities in India and elsewhere.

iii) Prathamesh Solarfarms Limited

Prathamesh Solarfarms Limited was under joint control till 29 January 2019 and were accounted for under equity method. The Group held 49% stake in these entities till 29 January 2019. Group acquired balance 51% stake on 30 January 2019 and the entity is consolidated in the Group’s financial statements with effect from 30 January 2019. The entity is involved in the business of generation of power through renewable energy sources, considered as a separate CGU by the Group and are is a part of Solar Power reporting segment.

The acquisition date fair value of the equity interest held by the Group immediately before the acquisition date was INR 569. The Group has recognised INR 77 gain as a result of remeasurement to fair value the equity interest in the entity. The fair value gain has been included in “other income” of the Group

Assets acquired and liabilities assumed

The fair values of the identifiable assets and liabilities as at the date of acquisition were:


	For the year ended 31 March 2021				For the year ended 31 March 2019
Particulars	Acquisition of entities which were earlier under joint control		Regent Climate Connect Knowledge Solutions Private Limited		Prathamesh Solarfarms Limited
Acquisition date		1 January 2021		28 August 2020		30 January 2019
Assets
Property plant and equipment		2,559		1		3,199
Intangible assets		1,304		34		88
Right of use assets		38		—		—
Deferred tax assets (net)		—		9		51
Other non-current financial assets		—		0		573
Prepayments - non current		125		—		0
Loans - non current		11		—		—
Other non-current assets		24		—		102
Non current tax assets (net)		—		3		—
Trade receivables		107		6		339
Loans - current		837		—		—
Cash and cash equivalents		46		0		7
Bank balances other than cash and cash equivalent		1		—		—
Prepayments - current		17		—		1
Others current financial assets		36		1		11
Other current assets		4		2		10
Inventories		3		—		—

		5,112		56		4,381

Liabilities
Interest-bearing loans and borrowings - long term		4,072		8		3,255
Long term provisions		21		2		—
Other non-current liabilities		6		—		—
Other non-current financial liabilities		16		—		—
Deferred tax liabilities (net)		64		—		—
Interest-bearing loans and borrowings - short term		—		24		—
Trade payables		152		7		30
Other current financial liabilities		353		2		221
Other current liabilities		—		9		2
Short term provisions		—		0		—

		4,684		52		3,508

Total identifiable net assets at fair value		428		4		873

Non controlling interest in the acquired entity		107		—		—
Acquisition date fair value of previously held equity interest*		507		—		569
Purchase consideration transferred		—		34		732
Goodwill on acquisition		185		30		428

Goodwill recognised represents the future economic and synergy benefits arising from assets acquired to strengthen its position in renewable energy sector. None of the goodwill recognised is expected to be deductible for income tax purposes.

The Group recognises non-controlling interests in the acquired entity either at fair value or at non-controlling interest’s proportionate share of the acquired entity’s net identifiable assets. This decision is made on acquisition-by-acquisition basis. For the non-controlling interests in Acquisition of entities which were earlier under joint control, the group elected to recognise the non-controlling interests at its proportionate share of the acquired net identifiable assets.

From the date of acquisition till the financial year end date, the acquired entities have contributed in revenue and loss / profit before tax as follows:


Particulars	Acquisition of entities which were earlier under joint control		Regent Climate Connect Knowledge Solutions Private Limited			Prathamesh Solarfarms Limited
Revenue		168		26			168
(Loss) / profit before tax		36		(36	)		27

If the combination had taken place at the beginning of the year, the Group’s revenue and loss before tax for the year would have been:


Particulars	For the year ended 31 March 2021			For the year ended 31 March 2019
Revenue		48,715			43,311
(Loss) / profit before tax		(5,180	)		3,160

Purchase consideration—cash flows


Particulars	Acquisition of entities which were earlier under joint control			Regent Climate Connect Knowledge Solutions Private Limited			Prathamesh Solarfarms Limited
Cash consideration paid		—			34			732
Less: cash balances acquired		(46	)		(0	)		(7	)

Acquisition of subsidiary, net of cash acquired		—			34			726

Cash acquired on acquisition of control in jointly controlled entities		46			—			—

There were no business combinations by the Group during the year ended 31 March 2020.

The Group recognises non-controlling interests in the acquired entity either at fair value or at non-controlling interest’s proportionate share of the acquired entity’s net identifiable assets. This decision is made on acquisition-by-acquisition basis. For the non- controlling interests in Acquisition of entities which were earlier under joint control, the group elected to recognise the non-controlling interests at its proportionate share of the acquired net identifiable assets.

Transaction with non-controlling interests

12 Months Ended

Mar. 31, 2021

Transaction with non-controlling interests

(b)	Transaction with non-controlling interests

(i) Acquisition of additional interest

ReNew Akshay Urja Limited

On 25 September 2020, the Group acquired an additional 44% interest in the voting shares of Renew Akshay Urja Limited, increasing its ownership interest to 100%. Cash consideration of INR 1515 was paid to the

non-controlling

shareholders.

The carrying value of the net assets of Renew Akshay Urja Limited was INR 2,976. The carrying value of the additional interest acquired at the date of acquisition was INR 1,591.

ReNew Solar Energy (Karnataka) Private Limited

On 19 June 2019, the Group acquired an additional 49% interest in the voting shares of ReNew Solar Energy (Karnataka) Private Limited, increasing its ownership interest to 100%. Cash consideration of INR 561 was paid to the

non-controlling

shareholders. The carrying value of the net assets of ReNew Solar Energy (Karnataka) Private Limited (excluding goodwill on the original acquisition) was INR 687. The carrying value of the additional interest acquired at the date of acquisition was INR 418.


	For the year ended 31 March 2021			For the year ended 31 March 2020
Particulars	ReNew Akshay Urja Limited			ReNew Solar Energy (Karnataka) Private
Date of transaction with non-controlling interests		25 September 2020			19 June 2019
Segment		Solar power			Solar power
Change in interest (%)		44.00	%		49.00	%

Non-controlling interest acquired		1,593			418
Cash consideration paid to non-controlling shareholders		1,515			561

Difference recognised in capital reserve within equity		78			(143	)

There are other insignificant acquisitions of

non-controlling

interest amounting to INR 29 for the year ended 31 March 2021 (31 March 2020: INR 82, 31 March 2019: INR Nil)

(ii) Change in interest without loss of control

On 28 March 2020, the Group entered into a transaction with GS Engineering & Construction Corp to issue equity equivalent to 49% interest in the voting shares of ReNew Solar Energy (Jharkhand Three) Private Limited, decreasing its ownership interest to 51%. Cash consideration of INR 832 was received from the

non-controlling

shareholders. The carrying value of the net assets of ReNew Solar Energy (Jharkhand Three) Private Limited was INR 601.

On 4 March 2020, the Group entered into a transaction with investors to issue 98.61% interest in the voting shares of ReNew Surya Mitra Private Limited, decreasing its ownership interest to 1.39%. Cash consideration of INR 14 was received from the

non-controlling

shareholders

The carrying value of the net assets of ReNew Surya Mitra Private Limited was INR (0). Following is a schedule of change in interest without loss of control:


	For the year ended 31 March 2020
Particulars	ReNew Solar Energy (Jharkhand Three) Private Limited			ReNew Surya Mitra Private Limited
Date of transaction with non-controlling interests		28 March 2020			4 March 2020
Segment		Solar power			Solar power
Change in interest (%)		49.00	%		98.61	%
Recognised in non-controlling interests		827			14
Cash consideration received from non-controlling shareholders		832			14

Difference recognised in retained earnings within equity		5			—

There are other insignificant additions to

non-controlling

interest amounting to INR 8 for the year ended 31 March 2021 (31 March 2020: INR 6, 31 March 2019: INR Nil).

Significant accounting judgments, estimates and assumptions

12 Months Ended

Mar. 31, 2021

Disclosure Of Accounting Judgements And Estimates [Abstract]

Significant accounting judgments, estimates and assumptions

55	Significant accounting judgments, estimates and assumptions

The preparation of consolidated financial statements requires management to make judgements, estimates and assumptions that affect the reported amounts of revenues, expenses, assets and liabilities and the accompanying disclosures. Uncertainty about these assumptions and estimates could result in outcomes that require a material adjustment to the carrying amount of assets or liabilities affected in future periods.

In the process of applying the accounting policies management has made certain judgments, estimates and assumptions. The key assumptions concerning the future and other key sources of estimation uncertainty at the reporting date, that have a significant risk of causing a material adjustment to the carrying amounts of assets and liabilities within the next financial year, are described below. The Group based its assumptions and estimates on parameters available when the consolidated financial statements were prepared. Existing circumstances and assumptions about future developments, however, may change due to market changes or circumstances arising that are beyond control of the Group. Such changes are reflected in assumptions when they occur.

A) Accounting judgements

Taxes

Deferred tax assets are recognised for unused tax losses to the extent that it is probable that taxable profit will be available against which the losses can be utilised. Significant management judgment is required to determine the amount of deferred tax assets that can be recognised, based upon the likely timing and the level of future taxable profits together with future tax planning strategies.

The Group makes various assumptions and estimates while computing deferred taxes which include production related data (PLFs), projected operations and maintenance costs, projected finance costs, proposed availment of deduction under section 80IA of the Income Tax Act, 1961 and the period over which such deduction shall be availed, usage of brought forward losses etc. While these assumptions are based on best available facts in the knowledge of management as on the balance sheet date however, they are subject to change year on year depending on the actual tax laws and other variables in the respective year. Given that the actual assumptions which would be used to file the return of income shall depend upon the tax laws prevailing in respective year, management shall continue to reassess these assumptions while calculating the deferred taxes on each reporting date and the impact due to such change, if any, is considered in the respective year.

Identification of a lease

Management has assessed applicability of IFRS 16 - ‘Leases’, for certain PPAs of the Group. In assessing the applicability, the management has exercised significant judgement in relation to the underlying rights and risks related to operations of the plant, control over design of the plant etc., in concluding that the PPA do not meet the criteria for recognition as a lease.

B) Estimates and assumptions

Capitalisation of internal costs

The Group capitalises certain internal costs incurred in connection with development of its wind and solar power Projects as eligible cost of property, plant and equipment as per IAS 16. The capitalisation of these costs during the construction period (including internal Employee benefit costs and other common expenses) begins when development efforts commence and ends when the asset is ready for its intended use. These expenses are allocated to all the wind and solar power projects of the Group in the form of ‘Management Shared Services’. Allocation of cost to the entities involves various estimates including retention for costs of management of investments in subsidiaries, allocation of cost for projects under construction

vis-a-vis

operating projects, profit

mark-up

which are assessed through an external expert. The capitalisation of internal costs increases construction in progress recognized during development of the related project asset and depreciated over its estimated useful life.

The Group capitalised such internal costs amounting to INR 1,649 during the year ended 31 March 2021 (31 March 2020: INR 1,713, 31 March 2019: INR 1,517).

Fair value measurement of financial instruments

When the fair values of financial assets and financial liabilities recorded in the balance sheet cannot be measured based on quoted prices in active markets, their fair value is measured using valuation techniques including the DCF model. The inputs to these models are taken from observable markets where possible, but where this is not feasible, a degree of judgment is required in establishing fair values. Assumptions include considerations of inputs such as liquidity risk, credit risk and volatility. Changes in assumptions about these factors could affect the reported fair value of financial instruments. See note 46 and 47 for further disclosures.

Useful life of depreciable assets

The useful lives and residual values of Group’s assets are determined by management at the time asset is acquired and are reviewed periodically, including at each financial year end. The useful lives and residual values are based on technical assessments, historical experience with similar assets as well as anticipation of future events, which may impact their life. These judgements best represent the period over which management expects to use its assets and its residual value.

Provision for decommissioning costs

Upon the expiration of the life of the wind and solar power plants, the Group considers a constructive obligation to remove the wind and solar power plant and restore the land. The Group records the fair value of the liability for the obligation to retire the asset in the period in which the obligation is incurred, which is generally when the asset is constructed. In determining the fair value of the provision, assumptions and estimates are made in relation to discount rates, the expected cost to decommission the power projects from the site and the expected timing of those costs. Refer note 25 for further disclosures.

Impairment of goodwill

The key assumptions used to determine the recoverable amount for the different CGUs are disclosed and further explained in note 6.

Provision for expected credit losses of trade receivables

The Group uses a provision matrix to calculate ECLs for trade receivables. The provision rates are based on days past due for groupings of various customer segments that have similar loss patterns (i.e., by geography, product type, customer type and rating etc.).

The provision matrix is initially based on the Group’s historical observed default rates. The Group will calibrate the matrix to adjust the historical credit loss experience with forward-looking information. At every reporting date, the historical observed default rates are updated and changes in the forward-looking estimates are analysed. The assessment of the correlation between historical observed default rates, forecast economic conditions and ECLs is a significant estimate. The amount of ECLs is sensitive to changes in circumstances and of forecast economic conditions. The Group’s historical credit loss experience and forecast of economic conditions may also not be representative of customer’s actual default in the future. The information about the ECLs on the Group’s trade receivables is disclosed in note 10.

Code on Social Security, 2020

12 Months Ended

Mar. 31, 2021

Disclosure of information about defined benefit plans [abstract]

Code on Social Security, 2020

56	Code on Social Security, 2020

The Code on Social Security, 2020 (‘Code’) relating to employee benefits during employment and post-employment benefits received Presidential assent in September 2020. The Code has been published in the Gazette of India. However, the date on which the Code will come into effect has not been notified and the final rules / interpretation have not yet been issued. The Group will assess the impact of the Code when it comes into effect and will record any related impact in the period the Code becomes effective. Based on a preliminary assessment, the Group believes the impact of the change will not be significant.

Impact of COVID-19

12 Months Ended

Mar. 31, 2021

Impact of Covid Nineteen [Abstract]

Impact of COVID-19

57	Impact of COVID-19

Due to outbreak of

COVID-19

in India and globally, the Group has continued its assessment of likely adverse impact on economic environment in general and financial risks on account of

COVID-19.

Considering that the Group is in the business of generation of electricity which is an essential service as emphasised by the Ministry of Home Affairs and Ministry of Power, Government of India and which is granted “Must Run” status by Ministry of New and Renewable Energy (MNRE), the management believes that the impact of outbreak on the business and financial position of the Group is not significant.

Further, MNRE directed that the payment to Renewable Energy power generator shall be done on regular basis as being done prior to lockdown and the Group has generally received regular collection from its customer(s). The management does not see any risks in the Group ability to continue as a going concern and has been able to service all debts obligations during the half year, however in certain cases has opted for moratorium for interest and principal instalments falling due to lenders under the “Reserve Bank of India’s COVID 19 – Regulatory Package dated 27 March 2020”. The Group is closely monitoring developments, its operations, liquidity and capital resources and is actively working to minimise the impact of the unprecedented situation.

Plan for initial public offering

12 Months Ended

Mar. 31, 2021

Plan for Initial Public Offering [Abstract]

Plan for initial public offering

58	Plan for initial public offering

The Company is in the process of listing on the NASDAQ through special purpose acquisition company route. On 24 February 2021, the Company entered into a Business Combination Agreement with (i) RMG Acquisition Corporation II, a Cayman Islands exempted company, (ii) Philip Kassin, solely in the capacity as the representative for the shareholders of RMG II, (iii) ReNew Energy Global Limited, a private limited company registered in England and Wales with registered number 13220321, (iv) ReNew Power Global Merger Sub, a Cayman Islands exempted company and (v) certain shareholders of the Company.

Subsequent events

12 Months Ended

Mar. 31, 2021

Disclosure of non-adjusting events after reporting period [abstract]

Subsequent events

59	Subsequent events

The Group has evaluated subsequent events through 21 June 2021, which is the date when the consolidated financial statements were authorised for issuance.

Summary of Significant Accounting Policies (Policies)

12 Months Ended

Mar. 31, 2021

Business combinations and goodwill

a)	Business combinations and goodwill

non-controlling

interests in the acquiree. For each business combination, the Group elects whether to measure the

non-controlling

interests in the acquiree at fair value or at the proportionate share of the acquiree’s identifiable net assets. Acquisition-related costs are expensed as incurred and included in other expenses.

•

Potential tax effects of temporary differences and carry forwards of an acquiree that exist at the acquisition date or arise as a result of the acquisition are accounted in accordance with IAS 12.

If the business combination is achieved in stages, any previously held equity interest is

re-measured

at its acquisition date fair value and any resulting gain or loss is recognised in the statement of profit or loss or OCI, as appropriate.

Goodwill is initially measured at cost, being the excess of the aggregate of the consideration transferred and the amount recognised for

non-controlling

re-assesses

Investment in associates and jointly controlled entities (joint ventures)

b)	Investment in associates and jointly controlled entities (joint ventures)

non-controlling

interests in the subsidiaries of the associate or joint venture.

Interests in joint operations

When a Group entity undertakes its activities under joint operations, the Group as a joint operator recognises in relation to its interest in a joint operation:

•

its assets, including its share of any assets held jointly;

•

its liabilities, including its share of any liabilities incurred jointly;

•

its revenue from the sale of its share of the output arising from the joint operation;

•

its share of the revenue from the sale of the output by the joint operation; and

•

its expenses, including its share of any expenses incurred jointly.

Current versus non-current classification

c)	Current versus non-current classification

The Group presents assets and liabilities in the statement of financial position based on current /

non-current

classification.

An asset is treated as current when it is:

•

Expected to be realised or intended to sold or consumed in normal operating cycle

•

Held primarily for the purpose of trading

•

Expected to be realised within twelve months after the reporting period, or

•

Cash or cash equivalents unless restricted from being exchanged or used to settle a liability for at least twelve months after the reporting period

All other assets are classified as

non-current.

A liability is treated as current when it is:

•

Expected to be settled in normal operating cycle

•

Held primarily for the purpose of trading

•

Due to be settled within twelve months after the reporting period, or

•

There is no unconditional right to defer the settlement of the liability for at least twelve months after the reporting period

All other liabilities are classified as

non-current.

Deferred tax assets / liabilities are classified as

non-current

assets / liabilities.

The terms of the liability that could, at the option of the counterparty, result in its settlement by the issue of equity instruments do not affect its classification.

Fair value measurement

d)	Fair value measurement

The Group measures financial instruments, such as, derivatives at fair value at each reporting date.

•

In the principal market for the asset or liability, or

•

In the absence of a principal market, in the most advantageous market for the asset or liability

The principal or the most advantageous market must be accessible by the Group.

non-financial

•

Level 1—Quoted (unadjusted) market prices in active markets for identical assets or liabilities

•

Level 2—Valuation techniques for which the lowest level input that is significant to the fair value measurement is directly or indirectly observable

•

Level 3—Valuation techniques for which the lowest level input that is significant to the fair value measurement is unobservable

For assets and liabilities that are recognised in the financial statements at fair value on a recurring basis, the Group determines whether transfers have occurred between levels in the hierarchy by

re-assessing

categorisation (based on the lowest level input that is significant to the fair value measurement as a whole) at the end of each reporting period.

The management of the Group determines the policies and procedures for both recurring fair value measurement, such as unquoted financial assets, and for

non-recurring

measurement, such as assets held for sale.

At each reporting date, the management of the Group analyses the movements in the values of assets and liabilities which are required to be remeasured or

re-assessed

This note summarises the accounting policy for determination of fair value. Other fair value related disclosures are given in the relevant notes as following:

•

Disclosures for significant estimates and assumptions (refer note 55)

•

Quantitative disclosures of fair value measurement hierarchy (refer note 47)

•

Financial instruments (including those carried at amortised cost) (refer note 46 and 47)

Revenue recognition

e)	Revenue recognition

(i) Revenue from contracts with customers

a) Sale of power

Income from supply of power is recognised over time on the supply of units generated from plant to the grid as per terms of the Power Purchase Agreement (PPA) entered into with the customers.

b) Income from services (management consultancy)

c) Sale of equipment

non-cash

consideration, and consideration payable to the customer. There is only one performance obligation in the arrangement and therefore, allocation of transaction price is not required.

d) Income from operation and maintenance services

Revenue from operation and maintenance services are recognised over time as per the terms of agreement.

e) Revenue from Engineering Procurement and Construction (EPC) Contracts

f) Sale of Reduction Emission Certificates (RECs)

Income from sale of RECs is recognised on sale of these certificates.

Variable consideration

• Rebates

In some PPAs, the Group provide rebates in invoice if payment is made before the due date. These are adjusted against revenue and are offset against amounts payable by the customers.

• Significant financing component

(ii) Contract balances

a) Contract assets

non-financial

assets.

b) Contract liabilities

c) Trade receivables

(iii) Others

a) Income from compensation for loss of revenue

Income from compensation for loss of revenue is recognised after certainty of receipt of the same is established.

b) Dividend

The Company recognises a liability to pay a dividend when the distribution is authorised and the distribution is no longer at the discretion of the Company.

Foreign currencies

f)	Foreign currencies

Foreign currency translation

Non-monetary

items that are measured in terms of historical cost in a foreign currency are translated using the exchange rates at the dates of the initial transactions.

Non-monetary

items measured at fair value in a foreign currency are translated using the exchange rates at the date when the fair value is determined.

The gain or loss arising on translation of

non-monetary

Group companies

Taxes

Current income tax

Deferred tax

Deferred tax liabilities are recognised for all taxable temporary differences, except:

•

re-assessed

at each reporting date and are recognised to the extent that it has become probable that future taxable profits will allow the deferred tax asset to be recovered.

In situations where Group is entitled to a tax holiday under the

Income-tax

Minimum Alternate Tax

Government grants

h)	Government grants

When the Group receive grants of

non-monetary

Generation based incentive

Subsidy (Viability Gap Funding)

Property, plant and equipment

i)	Property, plant and equipment

Subsequent costs

day-to-day

servicing of property, plant and equipment are recognised in statement of profit or loss as and when incurred.

Derecognition

de-recognition

Intangible assets

j)	Intangible assets

Intangible assets with finite lives are amortised over the useful life and assessed for impairment whenever there is an indication that the intangible asset may be impaired.

Development costs

Development expenditures on an individual project are recognised as an intangible asset when the Group can demonstrate:

•

The technical feasibility of completing the intangible asset so that the asset will be available for use or sale

•

Its intention to complete and its ability and intention to use or sell the asset

•

How the asset will generate future economic benefits

•

The availability of resources to complete the asset

•

The ability to measure reliably the expenditure during development

Depreciation / amortisation of property, plant and equipment and intangible assets

k)	Depreciation / amortisation of property, plant and equipment and intangible assets

Depreciation and amortisation are calculated on a straight-line basis over the estimated useful lives of the assets as follows:


Category		Life (in years)
Plant and equipment (solar rooftop projects)*		25 or terms of PPA, whichever is less (15-25)
Plant and equipment (wind and solar power projects)*		30-35
Plant and equipment (others)		5-18
Office equipment		5
Furniture and fixture		10
Computers		3
Computer servers		6
Computer software		3-6
Customer contracts		25
Development rights		25
Leasehold improvements		Useful life or lease term (5 years), whichever is lower
Building (Temporary structure)		3

Based on an external technical assessment, the management believes that the useful lives as given above and residual value of

0%-5%,

best represents the period over which management expects to use its assets and its residual value.

Inventories

l)	Inventories

Borrowing costs

m)	Borrowing costs

Leases

As a lessee

The Group applies a single recognition and measurement approach for all leases, except for short-term leases and leases of

low-value

assets. The Group recognises lease liabilities to make lease payments and

right-of-use

assets representing the right to use the underlying assets.

Right-of-use

assets

The Group recognises

right-of-use

assets at the commencement date of the lease (i.e., the date the underlying asset is available for use).

Right-of-use

assets are measured at cost, less any accumulated depreciation and accumulated impairment losses, and adjusted for any remeasurement of lease liabilities. The cost of

right-of-use

assets includes the amount of lease liabilities recognised, initial direct costs incurred, and lease payments made at or before the commencement date less any lease incentives received.

Right-of-use

assets are depreciated on a straight-line basis over the shorter of the lease term and the estimated useful lives of the assets, as follows:

•

Leasehold land: 13 to 30 years

•

Building: 3 to 5 years

The

right-of-use

assets are also subject to impairment. Refer to the accounting policies in section (o) Impairment of

non-financial

assets.

ii) Lease liabilities

in-substance

iii) Short-term leases and leases of

low-value

assets

low-value

As a lessor

Impairment of non-financial assets

o)	Impairment of non-financial assets

In assessing value in use, the estimated future cash flows are discounted to their present value using a pre

-tax

Impairment losses of continuing operations, including impairment on inventories, are recognised in the statement of profit or loss.

Share based payments

p)	Share based payments

Equity-settled transactions

The cost of equity-settled transactions is determined by the fair value at the date when the grant is made using an appropriate valuation model.

Service and

non-market

non-vesting

conditions.

Non-vesting

conditions are reflected in the fair value of an award and lead to an immediate expensing of an award unless there are also service and / or performance conditions.

No expense is recognised for awards that do not ultimately vest because of

non-market

performance and / or service conditions have not been met. Where awards include a market or

non-market

condition, the transaction are treated as vested irrespective of whether the market or

non-vesting

condition is satisfied, provided that all other performance and/or service condition are satisfied.

The dilutive effect of outstanding options is reflected as additional share dilution in the computation of diluted earnings per share.

Cash-settled transactions

Retirement and other employee benefits

q)	Retirement and other employee benefits

The Group operates a defined benefit plan in India, viz., gratuity. The cost of providing benefit under this plan is determined on the basis of actuarial valuation at each

period-end

carried out using the projected unit cost method.

Past service costs are recognised in statement of profit or loss on the earlier of:

•

The date of the plan amendment or curtailment; and

•

The date that the Group recognises related restructuring costs

•

Service costs comprising current service costs, past-service costs, gains and losses on curtailments and

non-routine

settlements; and

•

Net interest expense or income

period-end

non-current

liability.

Provisions

r)	Provisions

If the effect of the time value of money is material, provisions are discounted using a current

pre-tax

rate that reflects, when appropriate, the risks specific to the liability. When discounting is used, the increase in the provision due to the passage of time is recognised as a finance cost.

Decommissioning liability

pre-tax

Financial instruments

s)	Financial instruments

A financial instrument is any contract that gives rise to a financial asset of one entity and a financial liability or equity instrument of another entity.

Financial assets

Initial recognition and measurement

Subsequent measurement

For purposes of subsequent measurement, financial assets are classified in four categories:

Debt instruments at amortised cost

A ‘debt instrument’ is measured at the amortised cost if both the following conditions are met:

a) The asset is held within a business model whose objective is to hold assets for collecting contractual cash flows; and

b) Contractual terms of the asset give rise on specified dates to cash flows that are solely payments of principal and interest on the principal amount outstanding.

Debt instruments at FVTOCI

Debt instruments at FVTPL

FVTPL is a residual category for debt instruments. Any debt instrument, which does not meet the criteria for categorisation as at amortised cost or as FVTOCI, is classified as at FVTPL.

Debt instruments included within FVTPL category are measured at fair value with all changes recognised in the statement of profit or loss.

Equity investments

instrument-by-instrument

basis. The classification is made on initial recognition and is irrevocable.

Equity instruments included within FVTPL category are measured at fair value with all changes recognised in the statement of profit or loss.

Embedded derivatives

A derivative embedded in a hybrid contract, with a financial liability or

non-financial

Derecognition

A financial asset (or, where applicable, a part of a financial asset or part of a group of similar financial assets) is primarily derecognised when:

•

The rights to receive cash flows from the asset have expired, or

•

Impairment of financial assets

12-month

ECL. The Group considers that there has been a significant increase in credit risk when contractual payments are more than 30 days past due.

Lifetime ECL are the expected credit losses resulting from all possible default events over the expected life of a financial instrument. The

12-month

ECL is a portion of the lifetime ECL which results from default events that are possible within 12 months after the reporting date.

ECL impairment loss allowance (or reversal) during the period is recognised as income / expense in the statement of profit or loss.

Financial liabilities

Initial recognition and measurement

Subsequent measurement

The measurement of financial liabilities depends on their classification as discussed below:

Loans and borrowings

Compulsorily convertible preference shares

Compulsorily Convertible Preference Shares (CCPS) are separated into liability and equity components based on the terms of the contract.

On issuance of the CCPS, the fair value of the liability component is determined using a market rate for an equivalent

non-convertible

pro-rata

basis, net of associated income tax. The carrying amount of the conversion option is not remeasured in subsequent years.

Compound instruments—Compulsorily Convertible Debentures

Compulsorily Convertible Debentures (CCDs) are separated into liability and equity components based on the terms of the contract

The Group recognises interest, dividends, losses and gains relating to such financial instrument or a component that is a financial liability as income or expense in the statement of profit or loss.

Financial guarantees

Derecognition

Reclassification of financial assets and liabilities

Offsetting of financial instruments

Derivative financial instruments and hedge accounting

t)	Derivative financial instruments and hedge accounting

Initial recognition and subsequent measurement

re-measured

at fair value. Derivatives are carried as financial assets when the fair value is positive and as financial liabilities when the fair value is negative.

non-financial

asset or

non-financial

liability.

For the purpose of hedge accounting, hedges are classified as:

•

Fair value hedges when hedging the exposure to changes in the fair value of a recognised asset or liability or an unrecognised firm commitment

•

Hedges of a net investment in a foreign operation

•

There is ‘an economic relationship’ between the hedged item and the hedging instrument.

•

The effect of credit risk does not ‘dominate the value changes’ that result from that economic relationship.

•

Hedges that meet the strict criteria for hedge accounting are accounted for, as described below:

Cash flow hedges

non-financial

asset or

non-financial

liability subsequently becomes a firm commitment for which fair value hedge accounting is applied.

Cash and bank balances

u)	Cash and bank balances

(i) Cash and cash-equivalents

(ii) Bank balances other than cash and cash equivalents

Bank balances other than cash and cash equivalents consists of deposits with an original maturity of more than three months. These balances are classified into current and

non-current

portions based on the remaining term of the deposit.

Contingent liabilities

v)	Contingent liabilities

Contingent liabilities are disclosed when there is a possible obligation arising from past events, the existence of which will be confirmed only by the occurrence or

non-occurrence

Earnings per equity share (EPS)

w)	Earnings per equity share (EPS)

Non-current assets (and disposal groups) classified as held for sale

x)	Non-current assets (and disposal groups) classified as held for sale

The Group classifies

non-current

assets and disposal groups as held for sale if their carrying amounts will be recovered principally through a sale transaction rather than through continuing use.

Non-current

Property, plant and equipment, intangible assets and right of use assets are not depreciated or amortised once classified as held for sale.

Assets and liabilities classified as held for sale are presented separately as current items in the statement of financial position.

non-current

assets (or disposal group) is recognised at the date of

de-recognition.

New standards, interpretations and amendments

4.2	New standards, interpretations and amendments

4.2.1. New and amended standards and interpretations adopted by the Group

Amendments to IAS 1 and IAS 8 Definition of Material

Amendments to IFRS 3: Definition of a Business

Several other amendments and interpretations apply for the first time in the year ended 31 March 2021, but do not have an impact on the consolidated financial statements of the Group.

4.2.2. Standards issued but not yet effective

COVID-19

related rent concessions—amendment to IFRS 16

On 28 May 2020, the IASB issued

COVID-19

Covid-19

pandemic. As a practical expedient, a lessee may elect not to assess whether a

Covid-19

related rent concession from a lessor is a lease modification. A lessee that makes this election accounts for any change in lease payments resulting from the

Covid-19

•

Amendments to IFRS 9—Financial Instruments—Fees in the ‘10 percent’ test for derecognition of financial liabilities (effective from 1 January 2022*)

•

Amendments to IAS 12—Deferred Tax related to Assets and Liabilities arising from a Single Transaction (effective from 1 January 2023*)

•

Amendments to IAS 1 and IFRS Practice Statement 2—Disclosure of Accounting Policies (effective from 1 January 2023*)

•

Amendments to IAS 16—Property, Plant and Equipment: Proceeds before Intended Use (effective from 1 January 2022*)

•

Amendment to IFRS

16—Covid-19-Related

Rent Concessions beyond 30 June 2021 (effective from 1 April 2021*)

•

Amendments to IFRS 3—Reference to the Conceptual Framework (effective from 1 January 2022*)

•

Amendments to IAS 37—Onerous Contracts—Costs of Fulfilling a Contract (effective from 1 January 2022*)

•

Amendments to IAS 1—Classification of Liabilities as Current or

Non-current

(effective from 1 January 2023*)

•

Amendments to IAS 8—Definition of Accounting Estimates (effective from 1 January 2023*)

Effective for annual periods beginning on or after this date.

Summary of Significant Accounting Policies (Tables)

12 Months Ended

Mar. 31, 2021

Summary of Depreciation and Amortisation are Calculated on a straight-line basis over the estimated useful lives of the Assets

Depreciation and amortisation are calculated on a straight-line basis over the estimated useful lives of the assets as follows:


Category		Life (in years)
Plant and equipment (solar rooftop projects)*		25 or terms of PPA, whichever is less (15-25)
Plant and equipment (wind and solar power projects)*		30-35
Plant and equipment (others)		5-18
Office equipment		5
Furniture and fixture		10
Computers		3
Computer servers		6
Computer software		3-6
Customer contracts		25
Development rights		25
Leasehold improvements		Useful life or lease term (5 years), whichever is lower
Building (Temporary structure)		3

Based on an external technical assessment, the management believes that the useful lives as given above and residual value of

0%-5%,

best represents the period over which management expects to use its assets and its residual value.

Summary of Right-of-use assets

Right-of-use

assets are depreciated on a straight-line basis over the shorter of the lease term and the estimated useful lives of the assets, as follows:

•

Leasehold land: 13 to 30 years

•

Building: 3 to 5 years

Property, plant and equipment (Tables)

12 Months Ended

Mar. 31, 2021

Summary of Property, plant and equipment


	Freehold Land #			Plant and equipment			Buildings		Leasehold improvements		Office equipment			Furniture and fixtures		Computers			Capital work in progress			Total property, plant and equipment
Cost
As at 1 April 2019		8,705			295,406			65		124		56			49		64			16,269			320,738
Additions during the year^		1,258			48,419			—		6		12			8		26			49,218			98,947
Adjustments during the year*		(73	)		(51	)		—		—		—			—		—			(188	)		(312	)
Disposals during the year**		—			(95	)		—		—		(1	)		—		(4	)		(27	)		(127	)
Capitalised during the year		—			—			—		—		—			—		—			(47,373	)		(47,373	)

As at 31 March 2020		9,890			343,679			65		130		67			57		86			17,899			371,873
Additions during the year^		603			31,179			12		5		9			7		33			22,725			54,573
Acquisition of subsidiaries (refer note 54)		57			2,500			—		—		1			1		1			—			2,560
Disposal of subsidiary (refer note 39)		—			(14,998	)		—		—		(1	)		—		(0	)		—			(14,999	)
Adjustments during the year*		(19	)		(265	)		—		—		(1	)		—		(1	)		(4	)		(290	)
Disposals during the year**		—			(242	)		—		—		(1	)				(4	)		(39	)		(286	)
Capitalised during the year		—			—			—		—		—			—		—			(30,176	)		(30,176	)

As at 31 March 2021		10,531			361,853			77		135		74			65		115			10,405			383,255

Accumulated depreciation
As at 1 April 2019		—			21,237			15		25		20			9		30			—			21,336
Charge for the year (refer note 35)		—			9,827			3		11		7			6		11			—			9,865
Depreciation capitalised during the year		—			2			—		15		6			2		7			—			32
Adjustments during the year*		—			0			—		—		—			—		—			—			0
Disposals during the year		—			(0	)		—		—		(1	)		—		(4	)		—			(5	)

As at 31 March 2020		—			31,066			18		51		32			17		44			—			31,228
Charge for the year (refer note 35)		—			10,568			3		14		9			9		12			—			10,615
Depreciation capitalised during the year		—			4			—		13		6			2		7			—			32
Disposal of a subsidiary (refer note 39)		—			(615	)		—		—		(1	)		—		(0	)		—			(616	)
Disposals during the year		—			(35	)		—		—		(1	)		—		(4	)		—			(40	)

As at 31 March 2021		—			40,988			21		78		45			28		59			—			41,219

Net book value
As at 1 April 2019		8,705			274,169			50		99		36			40		34			16,269			299,402

As at 31 March 2020		9,890			312,613			47		79		35			40		42			17,899			340,645

As at 31 March 2021		10,531			320,865			56		57		29			37		56			10,405			342,036

The title represented by sale deeds in respect of land amounting to INR 379 (31 March 2020: INR 395) is not yet in the name of the Group. Further, the title of land amounting to INR

429

(31 March 2020: INR

510

) is held by way of General Power of Attorney (GPA) and the Group is in the process of getting title transferred in its name.

Intangible assets (Tables)

12 Months Ended

Mar. 31, 2021

Summary of Changes in Intangible Assets and Goodwill


	Computer software		Customer contracts#		Development rights		Other intangible assets		Goodwill		Intangible asset under development*			Total intangible assets
Cost
As at 1 April 2019		160		26,744		36		—		11,381		6			38,327
Additions during the year		19		—		—		—		—		60			79
Capitalised during the year		—		—		—		—		—		(13	)		(13	)

As at 31 March 2020		179		26,744		36		—		11,381		53			38,393
Additions during the year		86		—		—		—		215		49			350
Acquisition of subsidiaries (refer note 54)		7		1,304		—		7		—		20			1,338
Capitalised during the year		—		—		—		—		—		(67	)		(67	)

As at 31 March 2021		272		28,048		36		7		11,596		55			40,014

Amortisation
As at 1 April 2019		64		1,197		2		—		—		—			1,263
Charge for the year (refer note 35)		30		1,114		1		—		—		—			1,145
Amortisation capitalised during the year		—		15		—		—		—		—			15

As at 31 March 2020		94		2,326		3		—		—		—			2,423
Charge for the year (refer note 35)		23		1,142		1		—		—		—			1,166
Amortisation capitalised during the year		15		—		—		—		—		—			15

As at 31 March 2021		132		3,468		4		—		—		—			3,604

Net book value
At 1 April 2019		96		25,547		34		—		11,381		6			37,064

At 31 March 2020		85		24,418		33		—		11,381		53			35,970

At 31 March 2021		140		24,580		32		7		11,596		55			36,410

Remaining life of customer contracts ranges from 17 to 23 years as on 31 March 2021 (31 March 2020: 18 to 24 years)

Summary of Break-Up for Goodwill and Intangible Assets

Below is the

break-up

for goodwill and intangible assets under development for each group of cash generating units and individual cash generating units (CGU):


Group of CGU / individual CGU	31 March 2021		31 March 2020
Ostro Energy Group (wind power segment)
Goodwill		9,903		9,903

ReNew Vayu Urja (KCT) (wind power segment)
Goodwill		756		756

Prathamesh Solarfarms (solar power segment)
Goodwill		428		428

Others
Goodwill		510		294
Intangible asset under development		59		53

Summary of Information in Respect of Units for which Recoverable Amount Exceeds the Carrying Amount


Group of CGU / individual CGU	31 March 2021		31 March 2020
Ostro Energy Group (wind power segment)		3,090		4,106
ReNew Vayu Urja (KCT) (wind power segment)		2,727		1,628
Prathamesh Solarfarms (solar power segment)		1,775		586

Summary of Sensitivity Analysis for Cash Generating Unit

The assumptions explained above are consistent for each group of CGU and individual CGU to which Goodwill is allocated


Breakeven sensitivity:	31 March 2021	31 March 2020
Plant load factor (PLF)	If reduced by 7.41%	If reduced by 4.87%
Discount rate: (Pre-tax WACC)	11.89%	12.27%

Right of use assets (Tables)

12 Months Ended

Mar. 31, 2021

Summary of Right of Use Assets


	Leasehold land			Building			Total
Cost
As at 1 April 2019		4,270			450			4,720
Additions during the year		460			50			510
Deletions during the year		(4	)		(3	)		(7	)

As at 31 March 2020		4,726			497			5,223
Acquisition of subsidiaries during the year		36			—			36
Additions during the year		1,443			25			1,468
Modifications during the year		—			(26	)		(26	)
Disposal of subsidiary during the year		(1,745	)		—			(1,745	)

As at 31 March 2021		4,460			496			4,956


Depreciation
As at 1 April 2019		177			96			273
Charge for the year		192			38			230
Depreciation capitalised during the year		—			65			65

As at 31 March 2020		369			199			568
Charge for the year		191			54			245
Depreciation capitalised during the year		—			54			54
Disposal of subsidiary during the year		(175	)		—			(175	)

As at 31 March 2021		385			307			692


Net book value

At 1 April 2019		4,093			354			4,447

As at 31 March 2020		4,357			298			4,655

As at 31 March 2021		4,075			189			4,264

Investment in jointly controlled entities (Tables)

12 Months Ended

Mar. 31, 2021

Summary of Joint Ventures


	As at 31 March 2021		As at 31 March 2020
Investment in unquoted equity shares of entities under joint control at equity method (refer note 53)
Nil (31 March 2020: 3,498,744) equity shares of INR 10 each fully paid-up Aalok Solarfarms Limited		—		91
Nil (31 March 2020: 6,996,900) equity shares of INR10 each fully paid-up in Heramba Renewables Limited		—		170
Nil (31 March 2020: 3,498,744) equity shares of INR10 each fully paid-up in Abha Solarfarms Limited		—		89
Nil (31 March 2020: 6,997,494) equity shares of INR10 each fully paid-up in Shreyas Solarfarms Limited		—		174

Total		—		524

Financial assets (Tables)

12 Months Ended

Mar. 31, 2021

Summary of Financial Assets


	As at 31 March 2021		As at 31 March 2020
Non current

Financial assets at FVTPL
Investment in unquoted compulsorily convertible debentures of entities under joint control
Nil (31 March 2020: 1,040,625) 10.7% unsecured compulsorily convertible debentures of INR 100 each fully paid of Abha Solarfarms Limited		—		104
Nil (31 March 2020: 2,081,250) 10.7% unsecured compulsorily convertible debentures of INR 100 each fully paid of Heramba Renewables Limited		—		208
Nil (31 March 2020: 1,040,625) 10.7% unsecured compulsorily convertible debentures of INR 100 each fully paid of Aalok Solarfarms Limited		—		104
Nil (31 March 2020: 2,081,070) 10.7% unsecured compulsorily convertible debentures of INR 100 each fully paid of Shreyas Solarfarms Limited		—		208

Total		—		624

These entities have been acquired during the current year. Refer note 54 for details on business combinatio


	As at 31 March 2021		As at 31 March 2020
Financial assets at amortised cost
Loans
Security deposits		140		126

Total		140		126


Others
Bank deposits with remaining maturity for more than twelve months (refer note 16)		2,999		142

Total		2,999		142


	As at 31 March 2021		As at 31 March 2020
Current
Financial assets at amortised cost
Loans
Security deposits		45		5
Loans to related parties (refer note 44)		11		5

Total		56		10


	As at 31 March 2021		As at 31 March 2020
Others
Recoverable from related parties (refer note 44)		—		15
Deferred consideration receivable (refer note 39)		1,936		—
Advances recoverable		154		233
Government grant receivable
- viability gap funding		302		387
- generation based incentive receivable		859		1,362
Interest accrued on fixed deposits		394		607
Others		52		114

Total		3,697		2,718

Trade receivables (Tables)

12 Months Ended

Mar. 31, 2021

Summary of Non-Current Trade Receivables


	As at 31 March 2021		As at 31 March 2020
Non-current
Trade receivables		1,178		—

		1,178		—
Less: impairment allowances for bad and doubtful debts		—		—

		1,178		—

Summary of Current Trade Receivables


	As at 31 March 2021			As at 31 March 2020
Current
Trade receivables (refer notes 44 and 51)		35,364			26,090

		35,364			26,090
Less: impairment allowances for bad and doubtful debts		(562	)		(176	)

Total		34,802			25,914

Summary of Allowance for credit losses


	Impairment allowance
As at 1 April 2019		106
Provision for expected credit losses for the year		70

As at 31 March 2020		176
Provision for expected credit losses for the year		386

As at 31 March 2021		562

Deferred tax assets (DTA) / deferred tax liabilities (DTL) (net) (Tables)

12 Months Ended

Mar. 31, 2021

Summary of Deferred Tax Assets (Net)

11A	Deferred tax assets (net)


	As at 31 March 2021		As at 31 March 2020
Deferred tax assets (gross)
Compound financial instruments		31		140
Loss on mark to market of derivative instruments		222		7
Difference in written down value as per books of account and tax laws		1		1
Provision for decommissioning cost		1,246		1,030
Expected credit loss		54		18
Losses available for offsetting against future taxable income		15,173		12,430
Unused tax credit (MAT)		106		563
Provision for operation and maintenance equalisation		284		224
Lease liabilities		149		284
Financial guarantee contracts		24		—
Government grant (viability gap funding)		28		33
Others		97		66

Deferred tax assets (gross) - total (a)		17,415		14,796
Deferred tax liabilities (gross)
Compound financial instruments		6		5
Gain on mark to market of derivative instruments		81		1,074
Difference in written down value as per books of account and tax laws		15,407		11,773
Unamortised ancillary borrowing cost		169		226
Right of use asset		129		253
Government grant (viability gap funding)		11		—
Others		1		—

Deferred tax liabilities (gross) - total (b)		15,804		13,331

Deferred tax assets (net) (a) - (b)		1,611		1,465

Summary of Deferred Tax Liabilities (Net)

11B	Deferred tax liabilities (net)


	As at 31 March 2021		As at 31 March 2020
Deferred tax liabilities (gross)
Gain on mark to market of derivative instruments		54		765
Difference in written down value as per books of account and tax laws		33,930		28,498
Unamortised ancillary borrowing cost		162		119
Right of use asset		52		68
Fair value gain on financial instruments		0		10
Others		24		24

Deferred tax liabilities (gross) - total (c)		34,222		29,484
Deferred tax assets (gross)
Compound financial instruments		107		0
Loss on mark to market of derivative instruments		143		158
Unamortised ancillary borrowing cost		5		6
Provision for decommissioning cost		2,330		2,085
Expected credit loss		96		27
Losses available for offsetting against future taxable income		18,843		15,668
Unused tax credit (MAT)		1,248		695
Provision for operation and maintenance equalisation		411		410
Lease liabilities		61		57
Government grant (viability gap funding)		164		211
Other s		6		1

Deferred tax assets (gross) - total (d)		23,414		19,318

Deferred tax liabilities (net) (c) - (d)		10,808		10,166

Summary of Reconciliation of Tax Expense And Accounting Profit Multiplied By Tax Rate

11C	Reconciliation of tax expense and the accounting profit multiplied by tax rate


	For the year ended
	31 March 2021			31 March 2020			31 March 2019
Accounting profit before income tax		(5,128	)		(623	)		4,935
Tax at the India’s tax rate of 31.2% applicable to the Parent (31 March 2020: 31.2%, 31 March 2019: 31.2%)		(1,600	)		(194	)		1,540
Disallowance under section 94B of the Income Tax Act		1,333			1,328			1,131
Compensation for loss of revenue		—			—			(65	)
Interest on compound financial instrument		1,091			634			30
Tax rate differences		15			(96	)		(308	)
Changes in estimates on reasonable certainty for recoverability of tax losses		2,305			(1,426	)		330
Change in estimates for recoverability of unused tax credits (MAT)		82			316			—
Adjustment of tax relating to earlier periods		174			291			(64	)
On account of adoption of new tax ordinance
- Mat credit written off		48			938			—
- Recognition / reversal of deferred tax asset / deferred tax liability		(7	)		83			—
Effect of tax holidays and other tax exemptions		(879	)		271			(662	)
Deferred tax asset written off on sale of subsidiary (refer note 39)		306			—			—
Reinstatement loss on loan having income taxable under income from other sources		—			74			—
Other non-deductible expenses		36			(61	)		(131	)

At the effective income tax rate		2,904			2,158			1,801

Current tax expense reported in the statement of profit or loss		785			486			1,186
Deferred tax expense reported in the statement of profit or loss		2,091			1,714			634
Adjustment of current tax relating to earlier years		28			(42	)		(19	)

		2,904			2,158			1,801

Summary of Reconciliation of Deferred Tax Assets And Deferred Tax Liabilities (Net)

11D Reconciliation of deferred tax assets and deferred tax liabilities (net):

a) For the year ended 31 March 2021


Particulars	Opening balance DTA / (DTL) as at 1 April 2020			Income / (expense) recognised in profit or loss			Income / (expense) recognised in OCI			Income / (expense) recognised in equity		Income / (expense) recognised in profit or loss on sale of subsidiary			Addition through business combination			Closing balance DTA / (DTL) as at 31 March 2021
Compound financial instruments		138			(84	)		—			—		80			—			134
Gain / (loss) on mark to market of derivative instruments		(1,671	)		(7	)		1,905			—		—			—			227
Difference in written down value as per books of account and tax laws		(40,272	)		(8,782	)		—			—		366			(649	)		(49,337	)
Unamortised ancillary borrowing cost		(339	)		19			—			—		—			(5	)		(325	)
Provision for decommissioning cost		3,115			482			—			—		(26	)		4			3,575
Expected credit loss		44			105			—			—		(1	)		—			148
Fair value gain on financial instruments		(9	)		(8	)		—			—		17			—			0
Losses available for offsetting against future taxable income		28,098			6,304			(339	)		—		(719	)		675			34,019
Unused tax credit (MAT)		1,258			95			—			—		—			—			1,353
Provision for operation and maintenance equalisation		633			60			—			—		—			2			695
Lease liabilities		342			21			—			—		(157	)		4			210
Financial guarantee contracts		—			24			—			—		—			—			24
Government grant (viability gap funding)		244			(63	)		—			—		—			—			181
Right of use asset		(321	)		11			—			—		133			(4	)		(181	)
Others		39			39			1			—		—			1			80

		(8,701	)		(1,784	)		1,567			—		(307	)		28			(9,197	)

b) For the year ended 31 March 2020


Particulars	Opening balance DTA / (DTL) as at 1 April 2020			Income / (expense) recognised in profit or loss			Income / (expense) recognised in OCI			Income / (expense) recognised in equity			Income / (expense) recognised in profit or loss on sale of subsidiary		Addition through business combination		Closing balance DTA / (DTL) as at 31 March 2021
Compound financial instruments		172			(2	)		—			(32	)		—		—		138
Gain / (loss) on mark to market of derivative instruments		185			0			(1,856	)		—			—		—		(1,671	)
Difference in written down value as per books of account and tax laws		(34,254	)		(6,018	)		—			—			—		—		(40,272	)
Unamortised ancillary borrowing cost		(225	)		(114	)		—			—			—		—		(339	)
Provision for decommissioning cost		2,738			377			—			—			—		—		3,115
Expected credit loss		27			17			—			—			—		—		44
Fair value gain on financial instruments		0			(9	)		—			—			—		—		(9	)
Losses available for offsetting against future taxable income		23,038			5,060			—			—			—		—		28,098
Unused tax credit (MAT)		2,465			(1,207	)		—			—			—		—		1,258
Provision for operation and maintenance equalisation		454			179			—			—			—		—		633
Lease liabilities		352			(10	)		—			—			—		—		342
Government grant (viability gap funding)		255			(11	)		—			—			—		—		244
Right of use asset		(322	)		1			—			—			—		—		(321	)
Option premium		(31	)		31			—			—			—		—		—
Others		43			(8	)		4			—			—		—		39

		(5,103	)		(1,714	)		(1,852	)		(32	)		—		—		(8,701	)

c) For the year ended 31 March 2019


Particulars	Opening balance DTA / (DTL) as at 1 April 2018			Income / (expense) recognised in profit or loss			Income / (expense) recognised in OCI			Income / (expense) recognised in equity		Income / (expense) recognised in profit or loss on sale of subsidiary		Addition through business combination		Closing balance DTA / (DTL) as at 31 March 2019
Compound financial instruments		158			14			—			—		—		—		172
Gain / (loss) on mark to market of derivative instruments		93			—			92			—		—		—		185
Difference in written down value as per books of account and tax laws		(21,644	)		(12,721	)		—			—		—		111		(34,254	)
Unamortised ancillary borrowing cost		(218	)		(7	)		—			—		—		—		(225	)
Security deposit		41			(41	)		—			—		—		—		—
Provision for decommissioning cost		1,819			919			—			—		—		—		2,738
Expected credit loss		11			16			—			—		—		—		27
Fair value gain on financial instruments		(188	)		188			—			—		—		—		0
Losses available for offsetting against future taxable income		13,549			9,489			—			—		—		—		23,038
Unused tax credit (MAT)		1,244			1,221			—			—		—		—		2,465
Provision for operation and maintenance equalisation		432			22			—			—		—		—		454
Lease liabilities		150			202			—			—		—		—		352
Government grant (viability gap funding)		—			255			—			—		—		—		255
Right of use asset		(138	)		(184	)		—			—		—		—		(322	)
Option premium		—			(31	)		—			—		—		—		(31	)
Others		23			24			(4	)		—		—		—		43

		(4,668	)		(634	)		88			—		—		111		(5,103	)

Prepayments (Tables)

12 Months Ended

Mar. 31, 2021

Summary of current and non current prepayments explanatory


	As at 31 March 2021		As at 31 March 2020
Non-current
Prepaid expenses		679		1,205

Total		679		1,205

Current
Prepaid expenses		592		849

		592		849

Other Assets (Tables)

12 Months Ended

Mar. 31, 2021

Summary of other assets


	As at 31 March 2021		As at 31 March 2020
Non-current
Capital advance		7,497		5,460
Advances recoverable		142		95
Security deposits		8		8
Balances with government authorities		68		99

Total		7,715		5,662

Current
Advances recoverable (refer note 51)		1,553		1,061
Balances with government authorities		825		722
Contract asset (refer note 30(e))		86		25

Tota l		2,464		1,808

Inventories (Tables)

12 Months Ended

Mar. 31, 2021

Summary of Inventories


	As at 31 March 2021		As at 31 March 2020
Consumables and spares		833		609

Total		833		609

Derivative instruments (Tables)

12 Months Ended

Mar. 31, 2021

Summary of Derivative Instruments


	As at 31 March 2021		As at 31 March 2020
Financial assets at FVTOCI - cash flow hedges
Derivative instruments		2,691		8,718

Total		2,691		8,718

Cash and bank balances (Tables)

12 Months Ended

Mar. 31, 2021

Summary of Cash And Cash Equivalents Explanatory


	As at 31 March 2021		As at 31 March 2020
Cash and cash equivalents
Cash and cheque on hand		0		0

Balance with banks
- On current accounts		19,474		11,699
- Deposits with original maturity of less than 3 months #		1,205		1,390

		20,679		13,089

Summary of Bank Balances Other Than Cash And Cash Equivalents Explanatory


	As at 31 March 2021			As at 31 March 2020
Bank balances other than cash and cash equivalents
Deposits with
- Remaining maturity of less than twelve months #		26,506			31,203
- Remaining maturity of more than twelve months #		2,999			142

		29,505			31,345
Less: amount disclosed under financial assets (others) (refer note 9)		(2,999	)		(142	)

Total		26,506			31,203

Share capital (Tables)

12 Months Ended

Mar. 31, 2021

Summary of Authorized Share Capital


Authorised share capital	Number of shares		Amount
Equity shares of INR 10 each
As at 1 April 2019		500,000,000		5,000
Increase during the year		—		—

As at 31 March 2020		500,000,000		5,000
Increase during the year		—		—

As at 31 March 2021		500,000,000		5,000

Summary of Authorized Compulsory convertible preference shares


Compulsory convertible preference shares of INR 425 each (refer note 19)	Number of shares		Amount
As at 1 April 2019		—		—
Increase during the year		60,000,000		25,500

As at 31 March 2020		60,000,000		25,500
Increase during the year		—		—

As at 31 March 2021		60,000,000		25,500

Summary of Issued Share Capital


Issued share capital		Number of shares		Amount

17A	Equity shares of INR 10 each issued, subscribed and fully paid up


As at 1 April 2019	379,924,556	3,799
Shares issued during the year	—	—

As at 31 March 2020	379,924,556	3,799
Shares issued during the year	—	—

As at 31 March 2021	379,924,454	3,799

Other equity (Tables)

12 Months Ended

Mar. 31, 2021

Summary of Share Based Payment Reserve

Summary of Share Premium


As at 1 April 2019			67,165

As at 31 March 2020			67,165

As at 31 March 2021			67,165

Summary of Hedge Reserve


As at 1 April 2019	(512	)
OCI for the year (refer note 52)	(636	)
Attributable to non-controlling interests (refer note 52)	62

As at 31 March 2020	(1,086	)
OCI for the year (refer note 52)	(4,072	)
Attributable to non-controlling interests (refer note 52)	(66	)

As at 31 March 2021	(5,224	)


As at 1 April 2019	1,086
Expense for the year	207
Forfeiture of vested options	(132	)

As at 31 March 2020	1,161
Expense for the year	177
Repurchase of vested stock options	(176	)
Forfeiture of vested options	3

As at 31 March 2021	1,165

Summary of Retained Earnings / (Losses)


As at 1 April 2019	1,894
Loss for the year	(2,696	)
Re-measurement loss on defined benefit plans (net of tax)	(9	)
Adjustment due to forfeiture of vested options	132
Acquisition of interest by NCI in subsidiaries	5
Debenture redemption reserve created during the year	(33	)
Debenture redemption reserve released on account of repayment of debentures	1,914

As at 31 March 2020	1,207
Loss for the year	(7,818	)
Re-measurement loss on defined benefit plans (net of tax)	(7	)
Forfeiture of vested options	(3	)
Acquisition of interest by NCI in subsidiaries	29
Repurchase of vested stock options	(470	)
Debenture redemption reserve created during the year	(117	)
Debenture redemption reserve released on account of repayment of debentures	811
Others*	(121	)

As at 31 March 2021	(6,489	)

represents distribution to owner recognised for financial guarantees (refer note 44)

Summary of Other Components of Equity


At 31 March 2019*			4,289
At 31 March 2020*			2,279
At 31 March 2021*			1,661

Represents capital reserve, debenture redemption reserve and foreign currency translation reserve as explained below.

Summary of Capital Reserve


As at 1 April 2019	114
Amount utilised on acquisition of non-controlling interest	(143	)

As at 31 March 2020	(29	)
Gain on acquisition of non-controlling interest	78

As at 31 March 2021	49

Summary of Debenture Redemption Reserve


As at 1 April 2019	4,177
Debenture redemption reserve created during the year*	33
Amount transferred to retained earnings during the year	(1,914	)

As at 31 March 2020	2,296
Debenture redemption reserve created during the year*	117
Debenture redemption reserve transferred to retained earnings during the year	(811	)

As at 31 March 2021	1,602

Summary of Foreign Currency Translation Reserve


As at 1 April 2019	(2	)
Exchange differences on translation of foreign operations	14

As at 31 March 2020	12
Exchange differences on translation of foreign operations	(2	)

At 31 March 2021	10

Interest-bearing loans and borrowings (Tables)

12 Months Ended

Mar. 31, 2021

Summary of Interest - Bearing Loans And Borrowings


	Non-current								Current
	Notes		Nominal interest rate %	Maturity	As at 31 March 2021		As at 31 March 2020		As at 31 March 2021			As at 31 March 2020
Debentures
- Non convertible debentures (secured)		(i)	6.03% - 12.50%	March 2022 - September 2034		90,137		38,835		10,447			6,376
- Compulsorily convertible debentures (unsecured)		(ii)	8% - 10.70%	June 2026 - September 2036		809		553		—			—
Term loan from bank (secured)		(iii)	8.21% - 11.75%	December 2021 - December 2038		44,269		40,258		6,888			13,666
Term loan from financial institutions (secured)		(iv)	8.67% - 12.10%	September 2030 - March 2041		80,300		89,604		13,119			2,884
Senior secured notes		(v)	6.06% - 10.74%	September 2022 - February 2027		92,924		128,160		—			—
Compulsorily convertible preference shares		(vi)	15.02%	June 2022		26,697		23,200		—			—

Interest-bearing loans and borrowings - total #						335,136		320,610		30,454			22,926

Amount disclosed under the head ‘other current financial liabilities’ (refer note 21)						—		—		(30,454	)		(22,926	)

Interest-bearing loans and borrowings - net						335,136		320,610		—			—

Summary of Compulsorily Convertible Debentures (Unsecured) Terms of Conversion of CCDs

(ii) Compulsorily convertible debentures (unsecured) Terms of conversion of CCDs


Entity	Tenure (years)		Total proceeds		Maturity date	Interest coupon rate		Moratorium period
ReNew Mega Solar Private Limited*		25		193	22 August 2036 and 20 September 2036		8%	18 months from the date of issue
ReNew Solar Energy (Telangana) Private Limited*		20		620	20 September 2036		8%	18 months from the date of issue
Abha Solarfarms Limited		10		35	6 June 2026, 26 January 2027 and 24 May 2027		10.70%	24 months from the date of issue
Aalok Solarfarms Limited		10		35	6 June 2026, 26 January 2027 and 24 May 2027		10.70%	24 months from the date of issue
Shreyas Solarfarms Limited		10		69	8 June 2026 and 26 January 2027		10.70%	24 months from the date of issue
Heramba Renewables Limited		10		69	26 January 2027 and 24 May 2027		10.70%	24 months from the date of issue

Total				1,021

Compulsorily convertible debentures are compulsorily convertible into equity shares in accordance with the terms of the Joint Venture Agreement at conversion ratio of

1:1

. CCD do not carry any voting rights. Liability component of Compulsorily convertible debentures represent the present value of interest coupon.

Summary of Non-creation of Charge On Securities Against Outstanding Loans

Further, none of the following entities listed below have received any approval till date.


Entity name	Lender name	Amount
ReNew Solar Energy (Rajasthan) Private Limited	Power Finance Corporation Limited		3,025
Prathamesh Solarfarms Limited	Yes Bank *		1,522
Prathamesh Solarfarms Limited	Rural Electrification Corporation *		1,724
ReNew Solar Power Private Limited	Indian Renewable Energy Development		5,513
Ostro Jaisalmer Private Limited	Rural Electrification Corporation *		778
Ostro Urja Wind Private Limited	Rural Electrification Corporation *		2,165
Ostro Dakshin Power Private Limited	Ptc Financial Services Pvt. Ltd.		1,236
Ostro Dakshin Power Private Limited	Rural Electrification Corporation		3,803
Ostro Andhra Wind Private Limited	India Infrastructure Finance Co. Ltd		1,373
Ostro AP Wind Private Limited	India Infrastructure Finance Co. Ltd		1,404
Ostro Madhya Wind Private Limited	Rural Electrification Corporation *		2,143
Badoni Power Private Limited	Rural Electrification Corporation *		852
AVP Powerinfra Private Limited	Rural Electrification Corporation *		795
Ostro Anantapur Private Limited	Rural Electrification Corporation *		3,344
ReNew Wind Energy (Varekarwadi) Private Limited	Rural Electrification Corporation *		2,172

The corresponding loan balances have been fully repaid subsequent to the reporting date.

Summary of Compulsorily Convertible Preference Shares

The Company has issued INR 20,903 Compulsory Convertible Preference Shares (‘CCPS’) - Series A to certain existing shareholders:


Name of allottee	Number of shares allotted		Face value		Amount received		Balance as at 31 March 2021
GS Wyvern Holding Limited		16,395,294		425		6,968		8,899
Green Rock B 2014 Limited (acting in its capacity as		16,318,729		425		6,935		8,858
trustee of Green Stone A 2014 Trust)
Canada Pension Plan Investment Board		16,470,588		425		7,000		8,940

Total		49,184,611				20,903		26,697

Summary of Loan Moratorium

Moratorium
availed for

Company Name

Lender

Principal

Interest

Original
due date

Extended
due date

Settlement terms

Ostro Andhra Wind Private Limited

Indian Renewable Energy Development Agency Limited

30 June 2020

30 September 2020

Ostro Andhra Wind Private Limited

India Infrastructure Finance Corporation

30 June 2020

30 September 2020

Ostro Andhra Wind Private Limited

Tata Cleantech Capital Limited

30 June 2020

30 September 2020

Ostro AP Wind Private Limited

Indian Renewable Energy Development Agency Limited

30 June 2020

30 September 2020

Ostro AP Wind Private Limited

India Infrastructure Finance Corporation

30 June 2020

30 September 2020

Ostro AP Wind Private Limited

Tata Cleantech Capital Limited

30 June 2020

30 September 2020

ReNew Solar Energy (Rajasthan) Private Limited

Power Finance Corporation Limited

—

15 April 2020

—

ReNew Solar Energy (Rajasthan) Private Limited

Power Finance Corporation Limited

—

15 May 2020

—

ReNew Solar Energy (Rajasthan) Private Limited

Power Finance Corporation Limited

—

15 June 2020

—

ReNew Solar Energy (Rajasthan) Private Limited

Power Finance Corporation Limited

—

15 July 2020

—

ReNew Solar Energy (Rajasthan) Private Limited

Power Finance Corporation Limited

—

15 August 2020

—

Summary of Information About Loan With Moratorium

(iii) During the year ended 31 March 2021, the Group has availed moratorium on the following loans for a period of 90 days, which have been repaid:


Company Name	Lender	Moratorium availed on				Original due date
Company Name	Lender	Principal		Interest		Original due date
Ostro Mahawind Power Private Limited	Barclays Bank Plc.		4,165		—		31 May 2020
Vivasvat Solar Energy Private Limited	Indian Renewable Energy Development Association		—		5		30 April 2020
			—		5		31 May 2020
			—		5		30 June 2020
ReNew Solar Power Private Limited			—		5		30 June 2020
			—		5		31 July 2020
			—		5		30 April 2020
			—		5		31 May 2020
ReNew Wind Energy (Varekarwadi) Private Limited	PTC Financial Services		—		5		1 July 2020
ReNew Wind Energy (Varekarwadi) Private Limited	PTC Financial Services		—		5		1 August 2020

Summary of Non-convertible Debentures (Secured)


Listing status	Debenture Series	Face value per NCD (INR)		Numbers of NCDs outstanding				Outstanding amount						Nominal interest	Earliest redemption date		Last date of repayment		Terms of repayment
Listing status	Debenture Series	Face value per NCD (INR)		As at 31 March 2021		As at 31 March 2020		As at 31 March 2021			As at 31 March 2020			Nominal interest	Earliest redemption date		Last date of repayment		Terms of repayment
Non listed	Not applicable		1,000,000		1,026		1,133		1,026			1,133		9.41%		30-Jun-20		30-Sep-30		Quarterly
Non listed	Not applicable		1,000,000		4,966		5,222		4,966			5,222		9.60%		30-Jun-20		31-Mar-23		Quarterly
Non listed	Series 1		1,000,000		1,778		1,850		1,778			1,850		9.60%-9.95%		30-Jun-20		31-Mar-23		Quarterly
Non listed	Series 2		1,000,000		3,071		3,236		3,071			3,236		9.60%-9.95%		30-Jun-20		31-Mar-23		Quarterly
Non listed	Not applicable		1,000,000		2,844		2,955		2,844			2,955		9.95%		30-Jun-20		31-Mar-23		Quarterly
Listed	Not applicable		1,000,000		3,370		3,660		3,370			3,660		9.75%		30-Sep-20		31-Mar-33		Half yearly
Listed	Series-1		1,000,000		474		500		474			500		8.55%		30-Sep-20		30-Sep-34		Half yearly
Listed	Series-2		1,000,000		2,161		2,278		2,161			2,278		8.65%		30-Sep-20		30-Sep-34		Half yearly
Listed	Series-3		1,000,000		3,867		4,075		3,867			4,075		8.75%		30-Sep-20		30-Sep-34		Half yearly
Non listed	Not applicable		1,000,000		—		5,040		—			5,040		14.85%		31-May-21		15-Nov-25		Quarterly
Non listed	Not applicable		1,000,000		2,000		2,000		2,000			2,000		12.50%		27-Oct-22		27-Oct-22		Bullet
Listed	Not applicable		1,000,000		—		5,060		—			5,060		12.68%		26-Feb-21		26-Feb-21		Bullet
Non listed	Not applicable		1,000,000		2,000		2,000		2,000			2,000		11.96%		28-Sep-22		28-Sep-22		Bullet
Non listed	Not applicable		1,000,000		—		2,000		—			2,000		12.41%		31-Oct-22		31-Oct-22		Bullet
Non listed	Not applicable		1,000,000		—		1,210		—			1,210		9.18%		30-Nov-22		30-Nov-22		Bullet
Non listed	Not applicable		1,000,000		3,210		3,210		3,210			3,210		9.45%		30-Jul-25		30-Jul-25		Bullet
Non listed	Not applicable		1,000,000		3,738		—		3,738			—		8.55%		31-Aug-22		31-Aug-22		Bullet
Non listed	Not applicable		1,000,000		9,000		—		9,000			—		9.25%		30-Mar-22		30-Mar-22		Bullet
Non listed	Not applicable		1,000,000		5,159		—		5,159			—		8.46%		28-Apr-24		28-Apr-24		Bullet
Non listed	Not applicable		1,000,000		1,747		—		1,747			—		8.46%		28-Apr-24		28-Apr-24		Bullet
Non listed	Not applicable		1,000,000		1,674		—		1,674			—		8.46%		28-Apr-24		28-Apr-24		Bullet
Non listed	Not applicable		1,000,000		440		—		440			—		8.46%		28-Apr-24		28-Apr-24		Bullet
Non listed	Not applicable		1,000,000		5,948		—		5,948			—		8.46%		28-Apr-24		28-Apr-24		Bullet
Non listed	Not applicable		1,000,000		2,972		—		2,972			—		8.46%		28-Apr-24		28-Apr-24		Bullet
Non listed	Not applicable		1,000,000		1,197		—		1,197			—		8.46%		28-Apr-24		28-Apr-24		Bullet
Non listed	Not applicable		1,000,000		1,189		—		1,189			—		8.46%		28-Apr-24		28-Apr-24		Bullet
Non listed	Not applicable		1,000,000		1,188		—		1,188			—		8.46%		28-Apr-24		28-Apr-24		Bullet
Non listed	Not applicable		1,000,000		1,199		—		1,199			—		8.46%		28-Apr-24		28-Apr-24		Bullet
Non listed	Not applicable		1,000,000		1,196		—		1,196			—		8.46%		28-Apr-24		28-Apr-24		Bullet
Non listed	Not applicable		1,000,000		1,548		—		1,548			—		6.03%		22-Aug-26		22-Aug-26		Bullet
Non listed	Not applicable		1,000,000		6,765		—		6,765			—		6.03%		22-Aug-26		22-Aug-26		Bullet
Non listed	Not applicable		1,000,000		3,835		—		3,835			—		6.03%		22-Aug-26		22-Aug-26		Bullet
Non listed	Not applicable		1,000,000		11,721		—		11,721			—		6.03%		22-Aug-26		22-Aug-26		Bullet
Non listed	Not applicable		1,000,000		1,736		—		1,736			—		6.03%		22-Aug-26		22-Aug-26		Bullet
Non listed	Not applicable		1,000,000		3,663		—		3,663			—		6.03%		22-Aug-26		22-Aug-26		Bullet
Non listed	Not applicable		1,000,000		4,432		—		4,432			—		6.03%		22-Aug-26		22-Aug-26		Bullet

Total (gross)									101,114			45,429
Transaction cost									(530	)		(218	)

Total									100,584			45,211

Lease liabilities (Tables)

12 Months Ended

Mar. 31, 2021

Summary of Lease liabilities


	As at 31 March 2021		As at 31 March 2020
Non-current
Lease liabilities (refer note 41)		1,782		1,387

		1,782		1,387

Current
Lease liabilities (refer note 41)		330		259

Tota l		330		259

Other financial liabilities (Tables)

12 Months Ended

Mar. 31, 2021

Categories of non-current financial liabilities [abstract]

Summary of Other financial liabilities


	As at 31 March 2021		As at 31 March 2020
Non-current
Interest accrued but not due on debentures		132		—

		132		—

Current
Financial guarantee contracts		78		—

Financial liabilities at amortised cost
Current maturities of long term interest-bearing loans and borrowings (refer note 19)*		30,454		22,926

Others
Interest accrued but not due on borrowings		1,686		1,692
Interest accrued but not due on debentures		1,211		371
Capital creditors		9,001		8,926
Purchase consideration payable		191		272
Other payables		1		109

Total		42,622		34,296

Deferred government grant (Tables)

12 Months Ended

Mar. 31, 2021

Summary of detailed information about government grants


	As at 31 March 2021			As at 31 March 2020
Opening balance		848			891
Adjustment during the year		(58	)		(6	)
Released to the statement of profit or loss		(32	)		(37	)

Total		758			848

Current		39			38
Non-curren t		719			810

		758			848

Employee benefit liabilities (Tables)

12 Months Ended

Mar. 31, 2021

Summary of employee benefit liabilities


	As at 31 March 2021		As at 31 March 2020
Non-current
Provision for gratuity (refer note 40)		143		103

Tota l		143		103

Current
Provision for gratuity (refer note 40)		7		5
Provision for leave encashment		143		84
Share based payment liability (refer note 42(c))		102		—

Total		252		89

Contract liabilities (Tables)

12 Months Ended

Mar. 31, 2021

Contract liabilities [abstract]

Summary of contract liabilities


	As at 31 March 2021		As at 31 March 2020
Non-current
Deferred revenue		1,364		—

Total		1,364		—

Current
Deferred revenue		61		1

Total		61		1

Provisions (Tables)

12 Months Ended

Mar. 31, 2021

Provisions [abstract]

Summary of Provisions


	As at 31 March 2021		As at 31 March 2020
Non-current
Provision for decommissioning costs		13,686		11,950

Total		13,686		11,950

Current
Others		—		4

Total		—		4

Summary of Reconciliation Of Changes In Provision for Decommissioning Costs


	Provision for decommissioning costs
As at 1 April 2019		10,377
Arised during the year		1,049
Unwinding of discount and changes in discount rate		524

As at 31 March 2020		11,950
Arised during the year		1,071
Unwinding of discount and changes in discount rate		744
Acquisition of subsidiary		21
Disposal of subsidiary		(100	)

As at 31 March 2021		13,686

Other liabilities (Tables)

12 Months Ended

Mar. 31, 2021

Miscellaneous liabilities [abstract]

Summary of Other liabilities


	As at 31 March 2021		As at 31 March 2020
Non-current
Provision for operation and maintenance equalisation		2,736		2,938
Security deposit received		—		2
Others		11		12

Total		2,747		2,952


Current
Provision for operation and maintenance equalisation		490		435
Other payables
TDS payable		1,389		1,272
GST payable		367		331
Labour welfare fund payable		1		1
Provident fund payable		19		15

Total		2,266		2,054

Interest-bearing loans and borrowings1 (Tables)

12 Months Ended

Mar. 31, 2021

Disclosure of detailed information about borrowings [abstract]

Summary of Interest-bearing loans and borrowings


	As at 31 March 2021		As at 31 March 2020
Working capital term loan (secured)		5,525		5,630
Loan from bank (secured)		—		1,229
Acceptances (secured)		2,169		603
Buyer’s / supplier’s credit (secured)		2,949		4,496
Loan from related party (unsecured) (refer note 44)		—		190

Total #		10,643		12,148

Trade payables (Tables)

12 Months Ended

Mar. 31, 2021

Trade and other payables [abstract]

Summary of Trade payables


	As at 31 March 2021		As at 31 March 2020
Trade payables		3,245		3,733

Total		3,245		3,733

Derivative Instrument Liabilities (Tables)

12 Months Ended

Mar. 31, 2021

Summary of Derivative instrument financial liabilities


	As at 31 March 2021		As at 31 March 2020
Financial liabilities at FVTOCI - cash flow hedges
Derivative instruments		1,070		—

Total		1,070		—

Revenue from contracts with customers (Tables)

12 Months Ended

Mar. 31, 2021

Disclosure of disaggregation of revenue from contracts with customers [abstract]

Summary of Revenue from contracts with customers


	For the year ended
	31 March 2021		31 March 2020		31 March 2019
Sale of power		47,673		47,759		42,969
Sale of services - management shared services (refer note 44)		14		15		27
Income from engineering, procurement and construction service		434		543		82
Sale of services - operation and maintenance services (refer note 44)		37		16		—
Sale of services - consultancy service		26		—		—
Income from sale of renewable energy certificates		3		79		66

Total		48,187		48,412		43,144

Summary of Contract balance

e)	Contract balances


	As at 31 March 2021		As at 31 March 2020		As at 1 April 2019
Trade receivables (refer note 10)		35,980		25,914		19,176
Contract assets (refer note 13)		86		25		1
Contract liabilities (refer note 24)		1,425		1		4

Other operating income (Tables)

12 Months Ended

Mar. 31, 2021

Summary of Other operating income


	For the year ended
	31 March 2021		31 March 2020		31 March 2019
Income from leases		80		63		176
Income from sale of emission reduction certificates		—		15		—

Total		80		78		176

Finance income (Tables)

12 Months Ended

Mar. 31, 2021

Summary of Finance income


	For the year ended
	31 March 2021		31 March 2020		31 March 2019
Interest income accounted at amortised cost
- on fixed deposit with banks		1,563		2,044		1,393
- on trade receivables		114		—		—
- others		212		135		78
Gain on settlement of financial liabilities*		1,465		—		—

Total		3,354		2,179		1,471

Represents gain on derecognition of long term interest-bearing loans and borrowings accounted for using amortised cost method on account of reduction in premium on redemption due to early repayment

Other income (Tables)

12 Months Ended

Mar. 31, 2021

Summary of other income


	For the year ended
	31 March 2021		31 March 2020		31 March 2019
Government grant
- generation based incentive		1,846		2,098		2,288
- viability gap funding		32		37		39
Compensation for loss of revenue		431		89		379
Gain on sale of intangibles		0		219		—
Insurance claim		63		34		41
Fair value change of mutual fund (including realised gain)		—		—		272
Fair value gain on investment (refer note 54)		27		—		77
Income tax refund		160		—		—
Gain on derivative instruments designated as cash flow hedge (net)		16		—		—
Miscellaneous incom e		295		157		15

Total		2,870		2,634		3,111

Employee benefits expense (Tables)

12 Months Ended

Mar. 31, 2021

summary of Employee benefits expense


	For the year ended
	31 March 2021		31 March 2020		31 March 2019
Salaries, wages and bonus		949		785		728
Contribution to provident and other funds		50		37		41
Share based payments (refer note 42)		203		72		183
Gratuity expense (refer note 40)		15		13		13
Staff welfare expense s		42		44		43

Total		1,259		951		1,008

Depreciation and amortisation (Tables)

12 Months Ended

Mar. 31, 2021

Disclosure Of Schedule Of Depreciation And Amortisation Expense


	For the year ended
	31 March 2021		31 March 2020		31 March 2019
Depreciation of property, plant and equipment (refer note 5)		10,615		9,865		8,187
Amortisation of intangible assets (refer note 6)		1,166		1,145		1,118
Depreciation of right of use assets (refer note 7)		245		230		191

Tota l		12,026		11,240		9,496

Other expenses (Tables)

12 Months Ended

Mar. 31, 2021

Disclosure Of Detailed Information About Other Expenses [Abstract]

Disclosure Of Detailed Information About Other Expense


	For the year ended
	31 March 2021		31 March 2020		31 March 2019
Legal and professional fees		790		686		898
Corporate social responsibilit y		82		73		53
Travelling and conveyance		148		163		151
Lease rent relating to short term leases		22		24		23
Director’s commission		15		9		15
Printing and stationery		3		2		2
Rates and taxes		235		191		158
Payment to auditors		63		51		72
Insurance		527		201		148
Operation and maintenance		3,935		3,488		2,667
Repair and maintenance		104		65		23
Loss on sale/damage of property plant and equipment		205		104		197
Bidding expenses		12		26		22
Advertising and sales promotion		30		22		8
Impairment of capital work in progress		39		—		—
Security charges		241		195		176
Communication costs		36		31		26
Impairment loss on assets of disposal group held for sale (refer note 39)		408		—		—
Impairment allowances for financial assets		416		82		61
Miscellaneous expenses		271		252		103

Total		7,582		5,665		4,804

Finance costs (Tables)

12 Months Ended

Mar. 31, 2021

Summary of Earning Per Share

Finance costs


	For the year ended
	31 March 2021		31 March 2020		31 March 2019
Interest expense on (accounted at amortised cost)
- term loans		14,916		14,575		12,402
- loan from related party (refer note 44)		19		15		12
- acceptance		49		499		667
- buyer’s/supplier’s credit		68		420		1,159
- on working capital demand loan		252		602		331
- non convertible debentures		5,274		6,140		6,485
- compulsorily convertible debentures (unsecured)		60		59		78
- commercial papers		—		11		405
- senior secured notes		10,791		7,938		4,357
- lease liabilities		113		105		26
- compulsory convertible preference shares		3,361		2,230		—
- others		9		17		16
Bank charges		428		411		376
Option premium amortisation*		1,773		1,119		69
Loss on settlement of derivative instruments designated as cash flow hedge (net)*		76		302		304
Unwinding of discount on provisions		745		524		329
Unamortised ancillary borrowing cost written off#		347		520		523

Total		38,281		35,487		27,538

Earnings / (loss) per share (Tables)

12 Months Ended

Mar. 31, 2021

Earnings per share [abstract]

The following reflects the profit and share data used for the basic and diluted EPS computations:


	For the year ended
	31 March 2021			31 March 2020			31 March 2019
(Loss) / profit attributable to equity holders for basic earnings		(7,818	)		(2,696	)		2,646

		(7,818	)		(2,696	)		2,646

(Loss) / profit attributable to equity holders of parent for basic EPS		(7,818	)		(2,696	)		2,646
Weighted average number of equity shares for calculating basic EPS		483,921,868			459,201,195			379,797,836
Basic (loss) / earnings per share (in INR)		(16.16	)		(5.87	)		6.97


	For the year ended
	31 March 2021			31 March 2020			31 March 2019
Loss / profit attributable to equity holders of parent for diluted EPS		(7,818	)		(2,696	)		2,646
Weighted average number of equity shares for calculating diluted EPS		483,921,868			459,201,195			385,804,858

Diluted loss / earnings per share* (in INR)		(16.16	)		(5.87	)		6.86
Weighted average number of equity shares in calculating basic EPS		379,924,556			379,924,556			379,797,836

Effect of dilution in calculating basic EPS and diluted EPS
Compulsory convertible preference shares		103,997,312			79,276,639			—

Weighted average number of equity shares in calculating basic EPS		483,921,868			459,201,195			379,797,836

Effect of dilution in calculating diluted EPS
Convertible equity for employee stock option plan		7,476,734			4,866,286			6,007,022

Weighted average number of equity shares in calculating diluted EPS		491,398,602			464,067,481			385,804,858

Since the effect of conversion of employee stock option plan was anti-dilutive in the years ended 31 March 2021 and 2020, it has not been considered for the purpose of computing diluted EPS.

Gratuity and other post-employment benefit plans (Tables)

12 Months Ended

Mar. 31, 2021

Disclosure of defined benefit plans [line items]

Summary of employee benefit expense

a) Statement of profit or loss and OCI


	For the year ended
	31 March 2021			31 March 2020			31 March 2019
Net employees benefit expense recognised in employee cost
Current service cost		31			25			25
Interest cost on benefit obligation		7			6			5

Net benefit expense*		38			31			30


* This amount is inclusive of amount capitalised in different projects.

Net (expense) / income recognised in OCI		(8	)		(13	)		14

Summary of defined benefit plan liability recognized in statement of financial position

b) Statement of financial position


	As at 31 March 2021		As at 31 March 2020
Defined benefit liability
Present value of unfunded obligation		150		108

Net liability		150		108

Summary of change in present value of defined benefit obligation


	For the year ended
	31 March 2021			31 March 2020			31 March 2019
Changes in the present value of the defined benefit obligation
Opening defined benefit obligation		108			75			53
Current service cost		31			25			25
Interest cost		7			6			5
Benefits paid		(6	)		(10	)		(0	)
Liabilities assumed / (settled)		—			(1	)		—
Remeasurements during the year due to:
- Experience adjustments		7			2			(14	)
- Change in financial assumptions		—			11			—
- Change in demographic assumptions		—			0			(0	)
Liabilities net of planned assets assumed under business combination		3			—			—
Assets extinguished on curtailments/settlements		—			—			6

Closing defined benefit obligation		150			108			75

Summary of principal assumptions used in defined benefit plan

c) Principal assumptions used in determining gratuity obligations


	For the year ended
	31 March 2021			31 March 2020			31 March 2019
Discount rate		6.85	%		6.85	%		7.75	%
Salary escalation		10.00	%		10.00	%		10.00	%

Summary of sensitivity analysis for significant actuarial assumptions


Particulars	Change in assumptions			For the year ended
Particulars	Change in assumptions			31 March 2021		31 March 2020		31 March 2019
Discount rate		+ 0.5	%		141		110		66
		- 0.5	%		159		97		76
Salary escalation		+ 0.5	%		156		110		74
		- 0.5	%		144		97		67

Summary of maturity analysis of defined benefit payments

d) Projected plan cash flow

The table below shows the expected cash flow profile of the benefits to be paid to the current membership of the plan based on past service of the employees as at the valuation date:


Maturity profile	As at 31 March 2021		As at 31 March 2020
Within next 12 months		7		5
From 2 to 5 years		37		27
From 6 to 9 years		40		36
10 years and beyond		330		226

Defined Contribution Plan [Member]

Disclosure of defined benefit plans [line items]

Summary of employee benefit expense

Defined contribution plan

For the year ended

31 March
2021

31 March
2020

31 March
2019

Contribution to provident fund and other fund charged to statement of profit or loss (inclusive of amount capitalised in different projects)

108

Disposal of subsidiary (Tables)

12 Months Ended

Mar. 31, 2021

Disclosure of Disposal Groups Classified as Held For Sale [Abstract]

Summary of assets and liabilities of subsidiary at the date of disposal

a)	Assets and liabilities of Adyah Solar at the date of disposal


Particulars		As at 15 February 2021
Assets
Property, plant and equipment			14,383
Right of use assets			1,571
Trade receivables			621
Bank balances other than cash and cash equivalents			392
Cash and cash equivalents			16
Other non-current assets			10
Prepayments (non-current)			37
Other current financial assets			2
Other current assets			25

Total assets	(a)		17,057
Liabilities
Interest-bearing loans and borrowings			10,336
Others non-current financial liabilities			596
Long term provisions			100
Others current financial liabilities			48
Other current liabilities			20

Total liabilities	(b)		11,100

Net assets sold	(c) = (a) - (b)		5,957

Total consideration	(d)		5,549
Total impairment loss on assets of disposal group held for sale (presented under other expenses in statement of profit or loss)	(d) = (c) - (d)		408
Consideration satisfied by:
Cash and cash equivalents			3,613
Deferred consideration receivable			1,936

			5,549

Schedule of results of disposal of subsidiary included in statement of profit or loss

c)	The results of Adyah Solar included in statement of profit or loss were as follows:


	For the year ended
	31 March 2021			31 March 2020
Income		2,372			1,998
Expenses		(2,718	)		(2,563	)

Loss before tax		(346	)		(565	)
Income tax expense		229			113

Loss for the year		(117	)		(452	)

In accordance with the IFRS 5, depreciation and amortisation on the assets of Adyah Solar Energy Private Limited ceased as at 28 September 2020.

Schedule of impact on cash flow statement on disposal of subsidiary

d)	Impact on cash flow statement


Net cash inflow arising on disposal:
Consideration received in cash and cash equivalents	3,613
Less: cash and cash equivalents disposed	(16	)

	3,597

Leases (Tables)

12 Months Ended

Mar. 31, 2021

Summary of carrying amounts of lease liabilities carried at amortized cost

Set out below are the carrying amounts of lease liabilities carried at amortised cost and the movements during the year:


	For the year ended
Particulars	31 March 2021			31 March 2020			31 March 2019
Opening balance		1,646			1,436			1,034
Additions		1,101			410			1,943
Acquisition of subsidiary		17			—			—
Capitalised during the year		105
Accretion of interest		113			147			125
Lease modification during the year		(26	)		—			—
Disposal of subsidiary		(596	)		—			—
Payments		(248	)		(347	)		(1,666	)

Closing balance		2,112			1,646			1,436

Current		330			259			347
Non-current		1,782			1,387			1,089

Share based payment (Tables)

12 Months Ended

Mar. 31, 2021

Statement [Line Items]

Schedule of Terms And Conditions of Share Based Payment Arrangement under Employee Stock Option Plan Schemes

The relevant terms of the ESOP schemes are as below:

Plans

2018 Stock

Option Plan

Modified

(new plan)

2018 Stock

Option Plan

2017 Stock

Option Plan

2016 Stock

Option Plan

2014 Stock

Option Plan

2011 Stock

Option Plan

Grant date

16 August 2019

Multiple

Vesting period

Time linked vesting:

Grants will vest in 5 years on quarterly basis which shall commence one year after the date of grant of options

Time linked vesting

: 50 % of grants will vest in 5 years as follows:

i) One year from the date of grant, the Options for the first four quarters shall vest immediately.

ii) Thereafter, vesting will continue on a quarterly basis for the unvested Options.

Remaining 50% will vest at the end of 5 years from the date of grant.

Time linked vesting:

50 % of grants will vest in 5 years as follows:

i) One year from the date of grant, the Options for the first four quarters shall vest immediately.

ii) Thereafter, vesting will continue on a quarterly basis for the unvested Options.

Remaining 50% will vest at the end of 5 years from the date of grant.

Time linked vesting:

Performance linked vesting:

Time linked vesting:

5 years on quarterly basis which shall commence one year after the date of grant of option

Time linked vesting:

5 years from the grant date

Exercise period

Within 10 years from date of grant upon vesting

Exercise price

INR 400

INR 400, INR 415 and INR 420

INR 340

INR 205

INR 100 and 131

INR 100

Expiry date

16 August 2029

24 April 2028 to 31 December 2030

10 April 2027 to 25 February 2028

30 September 2026

31 December 2022 to 01 January 2025

30 September 2021 to 31 December 2022

Settlement type

Equity settled

Number of options outstanding as at (in million):

31 March 2020

31 March 2021

Schedule of Movement of Options Outstanding under the share based payment schemes

The movement of options outstanding under the share-based payment schemes are summarised below:


	Number of options (in million)
Particulars	31 March 2021			31 March 2020			31 March 2019
Outstanding at the beginning of the year		18			19			21
Granted during the year		1			1			1
Forfeited during the year		(0	)		(2	)		(0	)
Repurchase during the year		(3	)		—			—
Exercised during the year		—			—			(3	)

Outstanding at the end of the year		16			18			19

Exercisable at the end of the year		8			9			9

Schedule of Information about Fair Value of Inputs to Option Pricing Model Share Options Granted

The following tables list the inputs to the models used for the years ended 31 March 2021, 2020 and 2019, respectively:


	For the year ended
Particulars	31 March 2021	31 March 2020	31 March 2019
Dividend yield (%)	3.4%	2.9%	1.5%
Expected volatility (%)	22%	23%	15%
Risk–free interest rate (%)	4.16% - 5.92%	6.53%	7.70% - 8.12%
Weighted average remaining contractual life of options granted during current period	9.44 years	9.37 years	9.47 years
Weighted average share price (in INR)	471	415	415
Weighted average fair value (in INR)	133.01	110.43	121.84

Summary of Detailed Information About Repurchase Of Vested Stock Options

The details of repurchase of vested stock options are as follows:


Particulars	Amount
Total consideration paid for repurchase of vested stock options (a)		681
Fair value of the vested stock options repurchased, measured at the repurchase date, recognised in equity* (b)		650
Excess consideration paid recognised in statement of profit or loss (a) - (b)		31

Summary of Expense Recognised For Employee Services Received during the Year

The expense recognised for employee services received during the year is shown in the following table:


	For the year ended
Particulars	31 March 2021		31 March 2020		31 March 2019
Expense arising from equity-settled share-based payment transactions		189		206		316
Expense arising from repurchases vested stock options		31		—		—
Expense arising from cash settled share based payments transactions		102		—		—

Total expense arising from share-based payment transactions*		322		206		316

Vested Stock Options At The Date of Repurchase [Member]

Statement [Line Items]

Schedule of Information about Fair Value of Inputs to Option Pricing Model Share Options Granted


Particulars		31 March 2021
Share price per share at measurement date		420
Expected volatility		22%
Dividend yield		3.40%
Risk-free interest rate		4.16% - 5.92%

Cash Settled Share Based Payments [Member]

Statement [Line Items]

Schedule of Information about Fair Value of Inputs to Option Pricing Model Share Options Granted

The fair value of the cash settled share based payments was determined using the Black-Scholes model using the following inputs as at 31 March 2021:


Particulars		31 March 2021
Share price per share at measurement date		420
Expected volatility		22%
Dividend yield		3.40%
Risk-free interest rate		4.16% - 5.92%

Group information (Tables)

12 Months Ended

Mar. 31, 2021

Summary Of Joint Ventures

Summary Of Subsidiaries


S.No	Name of companies	Holding company	Country of incorporation	As at 31 March 2021	As at 31 March 2020
1	ReNew Wind Energy (AP 3) Private Limited	ReNew Power Private Limited	India	100%	100%
2	ReNew Solar Power Private Limited^	ReNew Power Private Limited	India	100%	100%
3	ReNew Wind Energy (MP) Private Limited	ReNew Power Private Limited	India	100%	100%
4	ReNew Wind Energy (Varekarwadi) Private Limited	ReNew Power Private Limited	India	100%	100%
5	ReNew Wind Energy Delhi Private Limited	ReNew Power Private Limited	India	100%	100%
6	ReNew Wind Energy (Jamb) Private Limited	ReNew Power Private Limited	India	100%	100%
7	ReNew Wind Energy (Devgarh) Private Limited	ReNew Power Private Limited	India	100%	100%
8	ReNew Wind Energy (AP) Private Limited*	ReNew Power Private Limited	India	70%	66%
9	Narmada Wind Energy Private Limited	ReNew Power Private Limited	India	100%	100%
10	ReNew Wind Energy (Sipla) Private Limited	ReNew Power Private Limited	India	100%	100%
11	ReNew Solar Energy (Jharkhand One) Private Limited^	ReNew Solar Power Private Limited	India	100%	100%
12	ReNew Solar Energy (Jharkhand Three) Private Limited*	ReNew Solar Power Private Limited	India	51%	51%
13	ReNew Solar Energy (Jharkhand Four) Private Limited	ReNew Solar Power Private Limited	India	100%	100%
14	ReNew Solar Energy (Jharkhand Five) Private Limited	ReNew Solar Power Private Limited	India	100%	100%
15	ReNew Wind Energy (Karnataka Two) Private Limited	ReNew Power Private Limited	India	100%	100%
16	Abaha Wind Energy Developers Private Limited	ReNew Power Private Limited	India	100%	100%
17	ReNew Solar Energy Private Limited^	ReNew Power Private Limited	India	100%	100%
18	ReNew Wind Energy (TN) Private Limited	ReNew Power Private Limited	India	100%	100%
19	ReNew Wind Energy (Budh 3) Private Limited	ReNew Solar Power Private Limited	India	100%	100%
20	ReNew Wind Energy (MP One) Private Limited	ReNew Power Private Limited	India	100%	100%
21	ReNew Solar Energy (Telangana) Private Limited*	ReNew Solar Power Private Limited	India	51%	51%
22	ReNew Power Services Private Limited^$	ReNew Power Private Limited	India	100%	100%
23	ReNew Solar Energy (Karnataka Two) Private Limited	ReNew Solar Power Private Limited	India	100%	100%
24	ReNew Wind Energy (Shivpur) Private Limited	ReNew Power Private Limited	India	100%	100%
25	ReNew Wind Energy (Karnataka) Private Limited*	ReNew Power Private Limited	India	71%	64%
26	ReNew Wind Energy (Karnataka 3) Private Limited	ReNew Solar Power Private Limited	India	100%	100%
27	ReNew Wind Energy (AP Five) Private Limited	ReNew Solar Power Private Limited	India	100%	100%
28	ReNew Saur Urja Private Limited	ReNew Solar Power Private Limited	India	100%	100%
29	Bhumi Prakash Private Limited	ReNew Solar Power Private Limited	India	100%	100%
30	Tarun Kiran Bhoomi Private Limited	ReNew Solar Power Private Limited	India	100%	100%
31	ReNew Saur Shakti Private Limited (Formerly known as Surya Prakash Urja Bhoomi Private Limited)	ReNew Solar Power Private Limited	India	100%	100%
32	ReNew Agni Power Private Limited (Formerly known as Bhanu Dhara Kiran Private Limited)	ReNew Solar Power Private Limited	India	100%	100%
33	ReNew Mega Solar Power Private Limited (Formerly known as Sun Season Private Limited)*	ReNew Solar Power Private Limited	India	51%	51%
34	ReNew Wind Energy (Rajasthan 2) Private Limited	ReNew Power Private Limited	India	100%	100%
35	ReNew Wind Energy (MP Two) Private Limited	ReNew Power Private Limited	India	100%	100%
36	ReNew Wind Energy (Jath Three) Private Limited	ReNew Power Private Limited	India	100%	100%
37	ReNew Wind Energy (Karnataka 4) Private Limited	ReNew Solar Power Private Limited	India	100%	100%
38	ReNew Wind Energy (Maharashtra) Private Limited	ReNew Solar Power Private Limited	India	100%	100%
39	ReNew Wind Energy (MP Four) Private Limited	ReNew Solar Power Private Limited	India	100%	100%
40	ReNew Wind Energy (AP2) Private Limited	ReNew Power Private Limited	India	100%	100%
41	ReNew Wind Energy (Orissa) Private Limited	ReNew Power Private Limited	India	100%	100%
42	ReNew Wind Energy (AP 4) Private Limited	ReNew Power Private Limited	India	100%	100%
43	ReNew Wind Energy (Jadeswar) Private Limited	ReNew Power Private Limited	India	100%	100%
44	ReNew Wind Energy (Welturi) Private Limited	ReNew Power Private Limited	India	100%	100%
45	ReNew Solar Services Private Limited^$ (Formerly known as ReNew Wind Energy (Vaspet 4) Private Limited)	ReNew Solar Energy Private Limited	India	100%	100%
46	ReNew Solar Energy (Rajasthan) Private Limited	ReNew Solar Power Private Limited	India	100%	100%
47	ReNew Wind Energy (Vaspet 5) Private Limited	ReNew Power Private Limited	India	100%	100%
48	ReNew Solar Energy (Karnataka) Private Limited*	ReNew Solar Power Private Limited	India	100%	100%
49	ReNew Wind Energy (TN 2) Private Limited	ReNew Solar Power Private Limited	India	100%	100%
50	ReNew Wind Energy (Rajkot) Private Limited	ReNew Power Private Limited	India	100%	100%
51	ReNew Wind Energy (Rajasthan) Private Limited	ReNew Power Private Limited	India	100%	100%
52	ReNew Akshay Urja Limited (Formerly known as ReNew Akshay Urja Private Limited)*	ReNew Solar Power Private Limited	India	100%	56%
53	ReNew Wind Energy (Jath) Limited (Formerly known as ReNew Wind Energy (Jath) Private Limited)	ReNew Power Private Limited	India	100%	100%
54	ReNew Wind Energy (Rajasthan One) Private Limited	ReNew Power Private Limited	India	100%	100%
55	ReNew Wind Energy (Rajasthan 3) Private Limited	ReNew Power Private Limited	India	100%	100%
56	ReNew Solar Energy (TN) Private Limited	ReNew Solar Power Private Limited	India	100%	100%
57	ReNew Wind Energy (Karnataka Five) Private Limited	ReNew Power Private Limited	India	100%	100%
58	ReNew Wind Energy (MP Three) Private Limited	ReNew Solar Power Private Limited	India	100%	100%
59	ReNew Wind Energy (Rajasthan Four) Private Limited	ReNew Solar Power Private Limited	India	100%	100%
60	ReNew Clean Energy Private Limited	ReNew Solar Power Private Limited	India	100%	100%
61	ReNew Distributed Solar Energy Private Limited^	ReNew Solar Energy Private Limited	India	100%	100%
62	ReNew Distributed Solar Services Private Limited	ReNew Solar Energy Private Limited	India	100%	100%
63	ReNew Distributed Solar Power Private Limited^	ReNew Solar Energy Private Limited	India	100%	100%
64	ReNew Surya Mitra Private Limited*^	ReNew Solar Energy Private Limited	India	68%	1%
65	ReNew Surya Prakash Private Limited^	ReNew Solar Energy Private Limited	India	100%	100%
66	ReNew Saur Vidyut Private Limited^	ReNew Solar Energy Private Limited	India	100%	100%
67	ReNew Solar Daylight Energy Private Limited	ReNew Solar Energy Private Limited	India	100%	100%
68	ReNew Solar Sun Flame Private Limited	ReNew Solar Energy Private Limited	India	100%	100%
69	ReNew Power Singapore Pte. Ltd.	ReNew Power Private Limited	Singapore	100%	100%
70	Abha Sunlight Private Limited	ReNew Solar Power Private Limited	India	100%	100%
71	Nokor Solar Energy Private Limited	ReNew Solar Power Private Limited	India	100%	100%
72	Izra Solar Energy Private Limited	ReNew Solar Power Private Limited	India	100%	100%
73	Zorya Solar Energy Private Limited	ReNew Solar Power Private Limited	India	100%	100%
74	Vivasvat Solar Energy Private Limited	ReNew Solar Power Private Limited	India	100%	100%
75	Nokor Bhoomi Private Limited	ReNew Solar Power Private Limited	India	100%	100%
76	Akhilagya Solar Energy Private Limited	ReNew Solar Power Private Limited	India	100%	100%
77	Adyah Solar Energy Private Limited@	ReNew Solar Power Private Limited	India	—	100%
78	ReNew Transmission Ventures Private Limited	ReNew Power Private Limited	India	100%	100%
79	Helios Infratech Private Limited	ReNew Power Private Limited	India	100%	100%
80	Shruti Power Projects Private Limited	ReNew Power Private Limited	India	100%	100%
81	Lexicon Vanijya Private Limited	ReNew Solar Power Private Limited	India	100%	100%
82	Symphony Vyapaar Private Limited	ReNew Solar Power Private Limited	India	100%	100%
83	Star Solar Power Private Limited	ReNew Solar Power Private Limited	India	100%	100%
84	Sungold Energy Private Limited	ReNew Solar Power Private Limited	India	100%	100%
85	ReNew Energy Services Private Limited (formerly known as Sunsource Energy Services Private Limited)	ReNew Solar Energy Private Limited	India	100%	100%
86	Molagavalli Renewable Private Limited	ReNew Power Private Limited	India	100%	100%
87	ReNew Vayu Urja Private Limited (Formerly known as KCT Renewable Energy Private Limited)	ReNew Power Private Limited	India	100%	100%
88	Rajat Renewables Limited	ReNew Power Private Limited	India	100%	100%
89	Kanak Renewables Limited	ReNew Power Private Limited	India	100%	100%
90	Bidwal Renewable Private Limited	ReNew Power Private Limited	India	100%	100%
91	Pugalur Renewable Private Limited	ReNew Power Private Limited	India	100%	100%
92	AVP Powerinfra Private Limited	Ostro Energy Private Limited	India	100%	100%
93	Badoni Power Private Limited	Ostro Energy Private Limited	India	100%	100%
94	Ostro Alpha Wind Private Limited	Ostro Energy Private Limited	India	100%	100%
95	Ostro Anantapur Private Limited	Ostro Energy Private Limited	India	100%	100%
96	Ostro Andhra Wind Private Limited	Ostro Energy Private Limited	India	100%	100%
97	Ostro AP Wind Private Limited	Ostro Energy Private Limited	India	100%	100%
98	Ostro Bhesada Wind Private Limited	Ostro Energy Private Limited	India	100%	100%
99	Ostro Dakshin Power Private Limited	Ostro Energy Private Limited	India	100%	100%
100	Ostro Dhar Wind Private Limited	Ostro Energy Private Limited	India	100%	100%
101	Ostro Jaisalmer Private Limited	Ostro Energy Private Limited	India	100%	100%
102	Ostro Kannada Power Private Limited	Ostro Energy Private Limited	India	100%	100%
103	Ostro Kutch Wind Private Limited	Ostro Energy Private Limited	India	100%	100%
104	Ostro Madhya Wind Private Limited	Ostro Energy Private Limited	India	100%	100%
105	Ostro Mahawind Power Private Limited	Ostro Energy Private Limited	India	100%	100%
106	Ostro Raj Wind Private Limited	Ostro Energy Private Limited	India	100%	100%
107	Ostro Rann Wind Private Limited	Ostro Energy Private Limited	India	100%	100%
108	Ostro Renewables Private Limited	Ostro Energy Private Limited	India	100%	100%
109	Ostro Urja Wind Private Limited	Ostro Energy Private Limited	India	100%	100%
110	Prathmesh Solarfarms Limited (refer note 54)	Ostro Energy Private Limited	India	100%	100%
111	Ostro Energy Private Limited	ReNew Power Services Private Limited	India	100%	100%
112	Zemira Renewable Energy Limited	ReNew Power Private Limited	India	100%	100%
113	ReNew Americas Inc. D	ReNew Power Private Limited	United States of America	—	100%
114	Auxo Solar Energy Private Limited	Renew Wind Energy (TN) Private Limited	India	100%	100%
115	ReNew Power International Limited	ReNew Power Private Limited	United Kingdom	100%	100%
116	Zorya Distributed Power Services Private Limited	ReNew Solar Energy Private Limited	India	100%	100%
117	ReNew Cleantech Private Limited	ReNew Solar Energy Private Limited	India	100%	100%
118	ReNew Sun Ability Private Limited	ReNew Solar Energy Private Limited	India	100%	100%
119	ReNew Mega Light Private Limited	ReNew Solar Energy Private Limited	India	100%	100%
120	ReNew Sun Waves Private Limited	ReNew Solar Energy (Jharkhand Four) Private Limited	India	100%	100%
121	ReNew Sun Flash Private Limited	ReNew Solar Energy Private Limited	India	100%	100%
122	ReNew Sun Bright Private Limited	ReNew Solar Energy (Jharkhand Four) Private Limited	India	100%	100%
123	ReNew Sun Energy Private Limited	ReNew Solar Power Private Limited	India	100%	100%
124	Auxo Sunlight Private Limited^	ReNew Solar Power Private Limited	India	100%	100%
125	ReNew Services Private Limited	ReNew Power Private Limited	India	100%	100%
126	ReNew Sun Power Private Limited	ReNew Solar Power Private Limited	India	100%	100%
127	ReNew Mega Urja Private Limited	ReNew Solar Energy Private Limited	India	100%	100%
128	ReNew Mega Spark Private Limited	ReNew Solar Energy Private Limited	India	100%	100%
129	ReNew Mega Green Private Limited	ReNew Solar Energy Private Limited	India	100%	100%
130	ReNew Green Energy Private Limited	ReNew Solar Energy Private Limited	India	100%	100%
131	ReNew Green Power Private Limited	ReNew Solar Energy Private Limited	India	100%	100%
132	Greenyana Sunstream Private Limited	ReNew Solar Energy Private Limited	India	100%	100%
133	Renew Vyoman Power Private Limited	ReNew Power Private Limited	India	100%	100%
134	Renew Vyoman Energy Private Limited	ReNew Power Private Limited	India	100%	100%
135	Renew Vyan Shakti Private Limited	ReNew Power Private Limited	India	100%	100%
136	Shekhawati Solar Park Private Limited	ReNew Solar Energy Private Limited	India	100%	100%
137	Renew Green Solutions Private Limited	ReNew Solar Energy Private Limited	India	100%	100%
138	Renew Surya Roshni Private Limited	ReNew Solar Energy Private Limited	India	100%	100%
139	Renew Solar Urja Private Limited	ReNew Solar Power Private Limited	India	100%	100%
140	Renew Surya Ojas Private Limited	ReNew Solar Power Private Limited	India	100%	100%
141	Renew Surya Vihaan Private Limited	ReNew Solar Power Private Limited	India	100%	100%
142	ReNew Surya Jyoti Private Limited	ReNew Solar Energy Private Limited	India	100%	—
143	ReNew Surya Aayan Private Limited	ReNew Solar Power Private Limited	India	100%	—
144	ReNew Solar Vidhi Private Limited	ReNew Solar Power Private Limited	India	100%	—
145	ReNew Surya Pratap Private Limited	ReNew Solar Energy Private Limited	India	100%	—
146	ReNew Surya Alok Private Limited	ReNew Green Energy Solutions Private Limited	India	69%	—
147	Renew Surya Kiran Private Limited	ReNew Green Energy Solutions Private Limited	India	100%	—
148	ReNew Surya Tejas Private Limited	ReNew Green Energy Solutions Private Limited	India	100%	—
149	ReNew Surya Uday Private Limited	ReNew Green Energy Solutions Private Limited	India	100%	—
150	ReNew Solar Piyush Private Limited	ReNew Solar Power Private Limited	India	100%	—
151	ReNew Solar Stellar Private Limited	ReNew Solar Power Private Limited	India	100%	—
152	Regent Climate Connect Knowledge Solutions Private Limited	ReNew Power Private Limited	India	100%	—
153	ReNew Vayu Energy Private Limited	ReNew Power Private Limited	India	100%	—
154	ReNew Vayu Power Private Limited	ReNew Power Private Limited	India	100%	—
155	ReNew Photovolitics Private Limited (Formerly Known As ReNew Saksham Urja Private Limited)	ReNew Power Private Limited	India	100%	—
156	ReNew Pawan Shakti Private Limited	ReNew Power Private Limited	India	100%	—
157	ReNew Pawan Urja Private Limited	ReNew Power Private Limited	India	100%	—
158	ReNew Sunlight Energy Private Limited	ReNew Green Energy Solutions Private Limited	India	100%	—
159	ReNew Sun Renewables Private Limited	ReNew Green Energy Solutions Private Limited	India	100%	—
160	ReNew Sun Shakti Private Limited	ReNew Green Energy Solutions Private Limited	India	100%	—
161	ReNew Ravi Tejas Private Limited	ReNew Green Energy Solutions Private Limited	India	100%	—
162	Aalok Solarfarms Limited#	Ostro Energy Private Limited	India	75%	—
163	Abha Solarfarms Limited#	Ostro Energy Private Limited	India	75%	—
164	Heramba Renewables Limited#	Ostro Energy Private Limited	India	75%	—
165	Shreyas Solarfarms Limited#	Ostro Energy Private Limited	India	75%	—

^	These companies are also engaged in providing EPC services apart from generation of power through non-conventional and renewable energy sources.

$	These companies are engaged in providing services for operation and management

#	These entities were under joint control till 31 December 2020 and were accounted for as equity method till this date. With effect from 1 January 2021, control was established over these entities and have been consolidated in the Group’s financial statements as at 31 March 2021.

@	Adyah Solar Energy Private Limited, a wholly owned subsidiary was disposed on 15 February 2021.

D	ReNew Americas Inc. was dissolved in November 2020.

(b) Interests in entities under joint control accounted for under equity method


S.No	Name of companies	Investor entity	Country of incorporation		As at 31 March 2021		As at 31 March 2020
1	Aalok Solarfarms Limited	Ostro Energy Private Limited		India		—		75	%
2	Abha Solarfarms Limited	Ostro Energy Private Limited		India		—		75	%
3	Heramba Renewables Limited	Ostro Energy Private Limited		India		—		75	%
4	Shreyas Solarfarms Limited	Ostro Energy Private Limited		India		—		75	%

Summary Of Joint Operations

(c)

Interests in joint operations*

S.No

Name of companies

Investor entity

Country of
incorporation

As at
31 March 2021

As at
31 March 2020

VG DTL Transmissions Projects Private Limited

ReNew Wind Energy (AP2) Private Limited

India

—

Also refer note 53(b

)

Related party disclosure (Tables)

12 Months Ended

Mar. 31, 2021

Summary Of Detailed Information About Related Party Relationship

I.	Entities with significant influence on the Company

GS Wyvern Holdings Limited

II.	Key management personnel or relatives of key management personnel

Mr. Sumant Sinha, Chairman and Managing Director

Mr. Ravi Seth, Chief Financial Officer (till 2 September 2019)

Mr. D Muthukumaran, Chief Financial Officer (from 3 September 2019)

Mr. Ashish Jain, Company Secretary and Compliance Officer

Mr. Parag Sharma, Chief Operating Officer and head of solar business (from 26 April 2018 till 1 November 2019)

Mr. Balram Mehta, President of wind business (till 8 November 2019)

Mr. Ravi Parmeshwar, Chief Human Resource Officer (till 8 November 2019)

Mrs. Vaishali Nigam Sinha, CSR and Communication Officer

III.	Entities owned or significantly influenced by key management personnel or their relatives:

Wisemore Advisory Private Limited

ReNew Foundation

IV.	Entities under joint control:

Prathamesh Solarfarms Limited (till 30 January 2019)

Heramba Renewables Limited (till 31 December 2020)*

Aalok Solarfarms Limited (till 31 December 2020)*

Shreyas Solarfarms Limited (till 31 December 2020)*

Abha Solarfarms Limited (till 31 December 2020)*

VG DTL Transmissions Private Limited

Summary Of Remuneration To Key Managerial Personnel

V.	Remuneration to key managerial personnel (KMP):


	For the year ended
	31 March 2021		31 March 2020		31 March 2019
Mr. Sumant Sinha		191		215		302
Mr. Ravi Seth		—		21		42
Mr. D Muthukumaran		100		88		—
Mr. Ashish Jain		7		7		6
Mr. Parag Sharma		—		17		37
Mr. Balram Mehta		—		30		37
Mr. Ravi Parmeshwar		—		17		19
Mrs. Vaishali Nigam Sinha		20		18		13

		318		413		456

Summary Of Details of Transactions and Balances with Entities having Significant Influence on the Company


	GS Wyvern Holdings Limited
Transactions during the year end	31 March 2021		31 March 2020		31 March 2019
Compulsorily convertible preference shares issued		—		7,734		—
Interest expense on compulsorily convertible preference shares outstandin g		1,165		—		—


	GS Wyvern Holdings Limited
Balances as at year end	31 March 2021		31 March 2020
Compulsorily convertible preference shares outstanding		8,899		7,734

Disclosure Of Detailed Information About Transactions And Balances With Entities Under Joint Control Explanatory

VII.	Transactions and balances with entities under joint control:


	Heramba Renewables Limited						Aalok Solarfarms Limited
Transactions during the year en d	31 March 2021		31 March 2020		31 March 2019		31 March 2021		31 March 2020		31 March 2019
Unsecured loan received		221		—		84		114		—		42
Unsecured loan repaid		4		11		15				7		5
Interest expense on unsecured loan received		6		5		1				—		—
Expenses incurred on behalf of the related party		23		0		—		11		—		0
Expenses incurred on behalf by the related party		—		—		—		0		—
Interest income on unsecured loan given		—		—		—		—		—		0
Income from management shared services		5		5		5		2		3		2
Income from operation and maintenance services		8		5		—		4		3		—
Interest income on compulsorily convertible debentures		17		21		—		8		12		—
Interest expense on unsecured loan received		—		—		—		3		2		0


Transactions during the year end	Shreyas Solarfarms Limited						Abha Solarfarms Limited
Transactions during the year end	31 March 2021		31 March 2020		31 March 2019		31 March 2021		31 March 2020		31 March 2019
Unsecured loan given		—		—		5		—		—		—
Unsecured loan received back		5		—		—		—		—		—
Unsecured loan received		222		—		84		105		43		—
Unsecured loan repaid		11		12		13		—		—		—
Expenses incurred on behalf of the related party		23		0		—		12		0		3
Expenses incurred on behalf by the related party		0		—		0		—		—		0
Interest income on unsecured loan given		0		0		—		—		—		—
Income from operation and maintenance services		8		5		—		4		3		—
Interest expense on unsecured loan received		6		5		1		4		3		—
Interest income on compulsorily convertible debentures		17		23		—		8		11		—
Income from management shared services		4		5		5		2		3		2


Transactions during the year end	Prathamesh Solarfarms Limited
Transactions during the year end	31 March 2021		31 March 2020		31 March 2019
Unsecured loan received		—		—		729
Unsecured loan repaid		—		—		156
Interest expense on unsecured loan received		—		—		10
Expenses incurred on behalf of the related party		—		—		3
Expenses incurred on behalf by the related party		—		—		0
Income from management shared services		—		—		13
Bank guarantee released from project lender(s)		—		—		193


Balances as at year end	Heramba Renewables Limited				Aalok Solarfarms Limited
Balances as at year end	31 March 2021		31 March 2020		31 March 2021		31 March 2020
Trade receivable		—		11		—		6
Recoverable from related party		—		3		—		—
Unsecured loan payable		—		58		—		30
Interest expense accrued on unsecured loan payable		—		5		—		—
Unbilled operation and maintenance revenue		—		6		—		3
Interest expense accrued on unsecured loan payable		—		—		—		3
Interest accrued on compulsorily convertible debentures		—		19		—		11
Corporate guarantee outstanding to project lender(s)		—		148		—		—
Recoverable from related party		—		—		—		3
Corporate guarantee outstanding to project lender(s)		—		—		—		74


Balances as at year end	Shreyas Solarfarms Limited				Abha Solarfarms Limited
Balances as at year end	31 March 2021		31 March 2020		31 March 2021		31 March 2020
Trade receivable		—		12		—		6
Trade payable		—		—		—		0
Unsecured loan payable		—		59		—		—
Unsecured loan receivable		—		5		—		—
Unbilled operation and maintenance revenue		—		6		—		3
Interest expense accrued on unsecured loan payable		—		5		—		3
Unsecured loan payable		—		—		—		43
Interest income accrued on unsecured loan receivable		—		0		—		—
Interest accrued on compulsorily convertible debentures		—		21		—		10
Recoverable from related party		—		3		—		6
Corporate guarantee outstanding to project lender(s)		—		148		—		74

Disclosure Of Detailed Information About Transactions And Balances With Other Related Parties

VIII.

Transactions and balances with other related parties:


Transactions during the year end	ReNew Foundation
	31 March 2021		31 March 2020
Contribution for CSR activities		0		3


Transactions during the year end	Mr. D Muthukumaran
	31 March 2021		31 March 2020
Salary advance		11		—


Balances as at year end	Mr. D Muthukumaran
	31 March 2021		31 March 2020
Salary advance		11		—

Segment information (Tables)

12 Months Ended

Mar. 31, 2021

Summary of reportable operating segments


	For the year ended 31 March 2021										For the year ended 31 March 2020										For the year ended 31 March 2019
Particulars	Wind power		Solar power		Unallocable			Total			Wind power		Solar power		Unallocable			Total			Wind power		Solar power		Unallocable			Total
Revenue from contracts with customers		29,411		18,737		39			48,187			31,800		16,598		14			48,412			29,480		13,637		27			43,144

Revenue from contracts with customers		29,411		18,737		39			48,187			31,800		16,598		14			48,412			29,480		13,637		27			43,144
Other income		4,198		1,030		1,076			6,304			3,066		594		1,231			4,891			3,701		636		421			4,758

Total income		33,609		19,767		1,115			54,491			34,866		17,192		1,245			53,303			33,181		14,273		448			47,902
Less: Employee benefit and other expenses		4,843		2,726		1,698			9,267			3,706		2,098		1,342			7,146			3,086		1,080		1,727			5,893

Total expenses		4,843		2,726		1,698			9,267			3,706		2,098		1,342			7,146			3,086		1,080		1,727			5,893

EBITDA		28,766		17,041		(583	)		45,224			31,160		15,094		(97	)		46,157			30,095		13,193		(1,279	)		42,009

Depreciation and amortisation expense									12,026										11,240										9,496
Finance costs									38,281										35,487										27,538

(Loss) / profit before share of profit of jointly controlled entities and tax									(5,083	)									(570	)									4,975

Share in loss of jointly controlled entities									(45	)									(53	)									(40	)
Income tax expense									(2,904	)									(2,158	)									(1,801	)

(Loss) / profit after tax									(8,032	)									(2,781	)									3,134

Fair values (Tables)

12 Months Ended

Mar. 31, 2021

Summary Of carrying amounts and fair value of the financial instruments

Set out below, is a comparison by class of the carrying amounts and fair value of the financial instruments of the group:


	As at 31 March 2021				As at 31 March 2020
	Carrying value		Fair value		Carrying value		Fair value
Financial assets
Measured at amortised cost
Security deposits		185		185		131		131
Bank deposits with remaining maturity for more than twelve months		2,999		2,999		142		142
Trade receivables		35,980		35,980		25,914		25,914
Cash and cash equivalents		20,679		20,679		13,089		13,089
Bank balances other than cash and cash equivalents		26,506		26,506		31,203		31,203
Advances recoverable		154		154		233		233
Deferred consideration receivable		1,936		1,936		—		—
Interest accrued on fixed deposits		394		394		607		607
Government grant receivable		1,161		1,161		1,749		1,749
Loans to related parties		11		11		5		5
Interest accrued on loans to related parties		—		—		0		0
Recoverable from related parties		—		—		15		15
Other current financial assets		52		52		114		114

Measured at FVTPL
Investment in unquoted compulsorily convertible debentures of entities under joint control		—		—		624		624

Measured at FVTOCI
Derivative instruments		2,691		2,691		8,718		8,718

Financial liabilities
Financial guarantee contracts		78		78		—		—
Measured at amortised cost
Non convertible debentures		100,584		101,725		45,211		45,211
Term loan from bank		51,157		51,455		53,924		53,924
Term loan from financial institutions		93,419		99,394		92,488		92,488
Compulsorily convertible debentures		809		809		553		553
Senior secured notes		92,924		98,308		128,160		128,160
Compulsorily convertible preference shares		26,697		26,697		23,200		23,200
Interest accrued but not due on borrowings		1,686		1,686		1,692		1,692
Interest accrued but not due on debentures		1,344		1,344		371		371
Capital creditors		9,001		9,001		8,926		8,926
Purchase consideration payable		191		191		272		272
Other payables		1		1		109		109
Interest-bearing loans and borrowings - Short term		10,643		10,643		12,148		12,148
Trade payables		3,245		3,245		3,733		3,733
Lease liabilities		2,112		2,112		1,646		1,646

Measured at FVTOCI
Derivative instruments		1,070		1,070		—		—

Fair Value Hierarchy (Tables)

12 Months Ended

Mar. 31, 2021

Summary Of fair value measurement hierarchy of the assets and liabilities

The following table provides the fair value measurement hierarchy of the assets and liabilities of the Group:-


			As at 31 March 2021				As at 31 March 2020
Financial assets	Level		Carrying value		Fair value		Carrying value		Fair value
Measured at amortised cost*
Security deposits		Level 3		140		140		126		126
Trade receivables		Level 2		1,178		1,178		—		—
Bank deposits with remaining maturity for more than twelve months		Level 2		2,999		2,999		142		142
Measured at FVTPL
Investments, unquoted debt securities		Level 3		—		—		624		624
Measured at FVTOCI
Derivative instruments		Level 2		2,691		2,691		8,718		8,718


			31 March 2021				31 March 2020
Financial liabilities	Level		Carrying value		Fair value		Carrying value		Fair value
Financial guarantee contracts				78		78
Measured at amortised cost*
Non convertible debentures		Level 3		100,584		101,725		45,211		45,211
Compulsorily convertible debentures		Level 3		809		809		553		553
Term loan from bank		Level 3		51,157		51,455		53,924		53,924
Term loan from financial institutions		Level 3		93,419		99,394		92,488		92,488
Compulsorily convertible preference shares		Level 3		—		—		23,200		23,200
Senior secured notes		Level 3		92,924		92,924		128,160		128,160
Interest accrued but not due on debentures		Level 3		132		132		—		—
Measured at FVTOCI
Derivative instruments		Level 2		1,070		1,070		—		—

Assets / liabilities for which fair values are disclosed

Summary of fair value hierarchy, Valuation techniques and inputs

Set out below are the fair value hierarchy, valuation techniques and inputs used as at 31 March 2021 and 2020:


Particulars	Level	Valuation technique	Inputs used
Financial assets measured at FVTPL

Investments, unquoted debt securities	Level 3	Discounted cash flow	Prevailing interest rates in market, future cash flows

Financial assets measured at FVTOCI

Derivative instruments	Level 2	Market value techniques	Forward foreign currency exchange rates, interest rates to discount future cash flows

Financial assets measured at amortised cost

Security deposits	Level 3	Discounted cash flow	Prevailing interest rates in market, future cash flows

Trade receivables	Level 2	Discounted cash flow	Prevailing interest rates in market, future cash flows

Bank deposits with remaining maturity for more than twelve months	Level 2	Market value techniques	Prevailing interest rates in market, future cash flows

Financial liabilities measured at FVTOCI

Derivative instruments	Level 2	Market value techniques	Forward foreign currency exchange rates, interest rates to discount future cash flows


Particulars	Level	Valuation technique	Inputs used

Financial liabilities measured at FVTPL

Financial guarantee contracts	Level 3	Discounted cash flow	Prevailing interest rates in market, future cash flows

Financial liabilities measured at amortised cost

Non convertible debentures	Level 3	Discounted cash flow	Prevailing interest rates in market, future cash flows

Compulsorily convertible debentures	Level 3	Discounted cash flow	Prevailing interest rates in market, future cash flows

Term loan from bank	Level 3	Discounted cash flow	Prevailing interest rates in market, future cash flows

Term loan from financial institutions	Level 3	Discounted cash flow	Prevailing interest rates in market, future cash flows

Senior secured notes	Level 3	Discounted cash flow	Prevailing interest rates in market, future cash flows

Compulsorily convertible preference shares	Level 3	Discounted cash flow	Prevailing interest rates in market, future cash flows

Interest accrued but not due on debentures	Level 3	Discounted cash flow	Prevailing interest rates in market, future cash flows

Financial risk management objectives and policies (Tables)

12 Months Ended

Mar. 31, 2021

Disclosure Of Change In Interest Rates On Financial Liabilities [Line Items]

Summary of Credit Risk Exposure on the Group's Trade Receivables

As at 31 March 2021


	Trade receivables (days past due)
	0 -6 months*		6 -12 months		12 -18 months		> 18 months		Total
Gross carrying amount		18,621		9,308		1,425		7,188		36,542
Expected credit loss		233		177		51		101		562

As at 31 March 2020

	Trade receivables (days past due)
	0 -6 months*		6 -12 months		12 -18 months		> 18 months		Total
Gross carrying amount		16,635		7,383		1,572		500		26,090
Expected credit loss		78		72		16		10		176

included trade receivables which are not yet due.

Summary of Maturity Profile of Financial Liabilities of Group Based on Contractual Undiscounted

The table below summarises the maturity profile of financial liabilities of group based on contractual undiscounted payments:


As at 31 March 2021	On demand		Less than 3 months		3 to 12 months		1 to 5 years		> 5 years		Total
Borrowings (other than CCPS)#
Non convertible debentures (secured)*		—		—		—		71,507		48,560		120,067
Compulsorily convertible debentures*		—		—		—		349		700		1,049
Term loan from banks*		—		—		—		26,929		45,804		72,733
Loans from financial institutions*		—		—		—		46,968		106,625		153,593
Senior secured notes*		—		—		—		85,989		21,242		107,231
Short term interest-bearing loans and borrowings
Acceptances (secured)		—		1,788		381		—		—		2,169
Buyer’s / supplier’s credit (secured)		—		—		2,962		—		—		2,962
Working capital term loan (secured)		—		175		5,350		—		—		5,525
Other financial liabilities
Lease liabilities		—		90		240		878		5,332		6,540
Current maturities of long term interest-bearing loans and borrowings*		11,088		9,960		36,422		—		—		57,470
Interest accrued but not due on borrowings		—		1,116		612		—		—		1,728
Interest accrued but not due on debentures		—		894		275		—		132		1,301
Capital creditors		—		9,001		—		—		—		9,001
Purchase consideration payable		—		191		—		—		—		191
Financial guarantee contracts@		4,900		—		—		—		—		4,900
Trade payables
Trade payables		—		3,245		—		—		—		3,245


As at 31 March 2020	On demand		Less than 3 months		3 to 12 months		1 to 5 years		> 5 years		Total
Borrowings (other than CCPS)#
Non convertible debentures (secured)*		—		—		—		35,647		18,903		54,550
Compulsorily convertible debentures*		—		—		65		261		745		1,071
Term loan from banks*		—		—		—		26,152		52,337		78,489
Loans from financial institutions*		—		—		—		53,874		117,070		170,944
Senior secured notes*		—		—		—		130,525		23,088		153,613
Short term interest-bearing loans and borrowings
Acceptances (secured)		—		293		310		—		—		603
Loan from related party (unsecured)		190		—		—		—		—		190
Buyer’s / supplier’s credit (secured)		—		583		3,927		—		—		4,510
Working capital term loan (secured)		—		5,630		—		—		—		5,630
Loan from bank (secured)		—		1,230		—		—		—		1,230
Other financial liabilities
Lease liabilities		—		113		148		768		3,310		4,339
Current maturities of long term interest-bearing loans and borrowings*		2,916		10,983		37,001		—		—		50,900
Interest accrued but not due on borrowings		—		537		1,156		—		—		1,693
Interest accrued but not due on debentures		—		242		129		—		—		371
Capital creditors		—		8,926		—		—		—		8,926
Purchase consideration payable		—		272		—		—		—		272
Trade payables
Trade payables		43		3,690		—		—		—		3,733

Including future interest payments.

Based on the maximum amount that can be called for under the financial guarantee contracts.

Interest rate risk

Disclosure Of Change In Interest Rates On Financial Liabilities [Line Items]

Summary of Changes interest Rates and Foreign currency sensitivity Exchange Rates

For the year ended

31 March 2021

31 March 2020

31 March 2019

Increase / decrease

Effect on profit

Increase / decrease

Effect on profit

Increase / decrease

Effect on profit

in basis points

before tax

in basis points

before tax

in basis points

before tax

INR

+/(-) 50

(-)/+ 646

+/(-) 50

(-)/+ 615

+/(-) 50

(-)/+ 499

US dollar

—

+/(-) 60

(-)/+ 3

Foreign currency sensitivity

Disclosure Of Change In Interest Rates On Financial Liabilities [Line Items]

Summary of Changes interest Rates and Foreign currency sensitivity Exchange Rates


	For the year ended
	31 March 2021					31 March 2020					31 March 2019
Change in USD rate		5	%	- 5	%		5	%	- 5	%		5	%	- 5	%
Effect on profit before tax		—		—			—		—			-23		23

Commitments, liabilities and contingencies (Tables)

12 Months Ended

Mar. 31, 2021

Disclosure of contingent liabilities [abstract]

Summary Of Contingent Liabilities


Description	As at 31 March 2021		As at 31 March 2020
Contingent liabilities on account of liquidated damages for delay in project commissioning. The management believes that any amount of liquidated damages to be levied by customer shall be entirely reimbursable from capital vendors of respective projects and from purchase consideration pending to be paid as per the contract clauses, accordingly no amount is provided in consolidated financial statements as at 31 March 2021 and 2020.		917		954
VAT, GST, service tax, entry tax matters #		91		5
Income tax disallowances / demands under litigation #@		40		23

Hedging activities and derivatives (Tables)

12 Months Ended

Mar. 31, 2021

Summary Of Foreign Currency And Interest Rate Risk

Forward contracts, swaps, call option and call spreads measured at FVTOCI are designated as hedging instruments in cash flow hedges of interest and principal payments in USD / CNH

31 March 2021

31 March 2020

Assets

Liabilities

Assets

Liabilities

Derivative contracts designated as hedging instruments

2,691

1,070

8,718

—

Summary Of Hedge Reserve Movement


	For the year ended
Hedge reserve movement	31 March 2021			31 March 2020			31 March 2019
a) Cash flow hedge reserve
Opening balance (after non-controlling interest)		(300	)		(429	)		(271	)
Gain / (loss) recognised on cash flow hedges		(5,104	)		1,373			(760.03	)
(Gain) / loss reclassified to profit or loss (under head finance costs)		(58	)		8			(5	)
(Gain) / loss reclassified to non financial assets or liabilities as basis adjustment (under head property, plant and equipment)		(9	)		559			230.18
(Gain) / loss reclassified to profit or loss as hedged future cash flows are no longer expected to occur		106			280			295.21
Income tax relating on cash flow hedges		1,365			(2,157	)		61

Closing balance		(4,000	)		(366	)		(450	)
Less: Non-controlling interest movement		(61	)		66			21

Closing balance (after non-controlling interest)		(4,061	)		(300	)		(429	)

b) Cost of hedge reserve on cash flow hedges
Opening balance (after non-controlling interest)		(785.25	)		(82	)		—
Effective portion of changes in fair value		(2,353.51	)		(2,119	)		(178	)
Amount reclassified to profit or loss as option premium amortisation (under head finance costs)		1,772.73			1,119			69
Amount transferred to property, plant and equipment		42.00			—			—
Tax effect		166.79			301			31

Closing balance		(1,157	)		(781	)		(78	)
Less: Non-controlling interest movement		(4	)		(4	)		(4	)

Closing balance (after non-controlling interest)		(1,161	)		(785	)		(82	)

Total Hedge reserve movement (a+b)
Opening balance (after non-controlling interest)		(1,085	)		(511	)		(271	)
OCI for the year		(4,072	)		(636	)		(258	)
Attributable to non-controlling interests		(65	)		62			17

Closing balance (after non-controlling interest)		(5,222	)		(1,085	)		(511	)

(a) Investments in entities under joint control (Tables)

12 Months Ended

Mar. 31, 2021

Disclosure of joint ventures [abstract]

Summary of investment in Joint Control that are Accounted using Equity Method

The Group also has investment in individually immaterial entities under joint control that are accounted using equity method.


Company name	Opening balance		Addition during the year		Share in loss of jointly controlled entity			Acquired during the year*			Closing balance
Abha Solarfarms Limited
For the year ended 31 March 2021		89		—		(7	)		(82	)		—
For the year ended 31 March 2020		84		15		(10	)		—			89
For the year ended 31 March 2019		88		—		(4	)		—			84
Heramba Renewables Limited
For the year ended 31 March 2021		170		—		(14	)		(156	)		—
For the year ended 31 March 2020		156		30		(16	)		—			170
For the year ended 31 March 2019		161		—		(4	)		—			157
Aalok Solarfarms Limited
For the year ended 31 March 2021		91		—		(7	)		(84	)		—
For the year ended 31 March 2020		86		14		(9	)		—			91
For the year ended 31 March 2019		89		—		(4	)		—			85
Shreyas Solarfarms Limited
For the year ended 31 March 2021		174		—		(17	)		(157	)		—
For the year ended 31 March 2020		163		29		(18	)		—			174
For the year ended 31 March 2019		170		—		(7	)		—			163
Prathamesh Solarfarms Limited
For the year ended 31 March 2019		492		—		(21	)		(471	)		—

Refer note 54

Business Combination (Tables)

12 Months Ended

Mar. 31, 2021

Disclosure of detailed information about business combination [abstract]

Summary Of Fair Values Of The Identifiable Assets And Liabilities As At The Date Of Acquisition

Assets acquired and liabilities assumed

The fair values of the identifiable assets and liabilities as at the date of acquisition were:


	For the year ended 31 March 2021				For the year ended 31 March 2019
Particulars	Acquisition of entities which were earlier under joint control		Regent Climate Connect Knowledge Solutions Private Limited		Prathamesh Solarfarms Limited
Acquisition date		1 January 2021		28 August 2020		30 January 2019
Assets
Property plant and equipment		2,559		1		3,199
Intangible assets		1,304		34		88
Right of use assets		38		—		—
Deferred tax assets (net)		—		9		51
Other non-current financial assets		—		0		573
Prepayments - non current		125		—		0
Loans - non current		11		—		—
Other non-current assets		24		—		102
Non current tax assets (net)		—		3		—
Trade receivables		107		6		339
Loans - current		837		—		—
Cash and cash equivalents		46		0		7
Bank balances other than cash and cash equivalent		1		—		—
Prepayments - current		17		—		1
Others current financial assets		36		1		11
Other current assets		4		2		10
Inventories		3		—		—

		5,112		56		4,381

Liabilities
Interest-bearing loans and borrowings - long term		4,072		8		3,255
Long term provisions		21		2		—
Other non-current liabilities		6		—		—
Other non-current financial liabilities		16		—		—
Deferred tax liabilities (net)		64		—		—
Interest-bearing loans and borrowings - short term		—		24		—
Trade payables		152		7		30
Other current financial liabilities		353		2		221
Other current liabilities		—		9		2
Short term provisions		—		0		—

		4,684		52		3,508

Total identifiable net assets at fair value		428		4		873

Non controlling interest in the acquired entity		107		—		—
Acquisition date fair value of previously held equity interest*		507		—		569
Purchase consideration transferred		—		34		732
Goodwill on acquisition		185		30		428

Summary Of Revenue Of Acquiree Profit And Loss Before Tax Of Acquired Entities Since Acquisition Date

From the date of acquisition till the financial year end date, the acquired entities have contributed in revenue and loss / profit before tax as follows:


Particulars	Acquisition of entities which were earlier under joint control		Regent Climate Connect Knowledge Solutions Private Limited			Prathamesh Solarfarms Limited
Revenue		168		26			168
(Loss) / profit before tax		36		(36	)		27

Summary Of Revenue And Profit And Loss Before Tax Of Combined Entity As If Combination Occurred At Beginning Of Period


Particulars	For the year ended 31 March 2021			For the year ended 31 March 2019
Revenue		48,715			43,311
(Loss) / profit before tax		(5,180	)		3,160

Summary Of Purchase Consideration Cash Flows

Purchase consideration—cash flows


Particulars	Acquisition of entities which were earlier under joint control			Regent Climate Connect Knowledge Solutions Private Limited			Prathamesh Solarfarms Limited
Cash consideration paid		—			34			732
Less: cash balances acquired		(46	)		(0	)		(7	)

Acquisition of subsidiary, net of cash acquired		—			34			726

Cash acquired on acquisition of control in jointly controlled entities		46			—			—

Transaction with non-controlling interests (Tables)

12 Months Ended

Mar. 31, 2021

Disclosure of Detailed Information About Acquisition of Additional Noncontrolling Interests [Abstract]

Summary Of Acquisition Of Additional Noncontrolling Interests


	For the year ended 31 March 2021			For the year ended 31 March 2020
Particulars	ReNew Akshay Urja Limited			ReNew Solar Energy (Karnataka) Private
Date of transaction with non-controlling interests		25 September 2020			19 June 2019
Segment		Solar power			Solar power
Change in interest (%)		44.00	%		49.00	%

Non-controlling interest acquired		1,593			418
Cash consideration paid to non-controlling shareholders		1,515			561

Difference recognised in capital reserve within equity		78			(143	)

Summary Of Change In Noncontrolling Interest Without Loss Of Control

The carrying value of the net assets of ReNew Surya Mitra Private Limited was INR (0). Following is a schedule of change in interest without loss of control:


	For the year ended 31 March 2020
Particulars	ReNew Solar Energy (Jharkhand Three) Private Limited			ReNew Surya Mitra Private Limited
Date of transaction with non-controlling interests		28 March 2020			4 March 2020
Segment		Solar power			Solar power
Change in interest (%)		49.00	%		98.61	%
Recognised in non-controlling interests		827			14
Cash consideration received from non-controlling shareholders		832			14

Difference recognised in retained earnings within equity		5			—

Basis of preparation - Additional Information (Detail)	12 Months Ended
Basis of preparation - Additional Information (Detail)	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Basis Of Presentation [Abstract]
Description of functional currency	INR	INR	INR

Summary of Significant Accounting Policies - Summary of Depreciation and amortisation are calculated on a straight-line basis over the estimated useful lives of the assets (Detail)	12 Months Ended
	Mar. 31, 2021
Plant and equipment (solar rooftop projects)
Disclosure Of Depreciation Amortization Of Tangible And Intangible Assets [Line Items]
Useful life measured as period of time, property, plant and equipment	25 years
Plant and equipment (solar rooftop projects) \| Bottom of range [Member]
Disclosure Of Depreciation Amortization Of Tangible And Intangible Assets [Line Items]
Useful life measured as period of time, property, plant and equipment	15 years
Plant and equipment (solar rooftop projects) \| Top of range [Member]
Disclosure Of Depreciation Amortization Of Tangible And Intangible Assets [Line Items]
Useful life measured as period of time, property, plant and equipment	25 years
Plant and equipment (wind and solar power projects) \| Bottom of range [Member]
Disclosure Of Depreciation Amortization Of Tangible And Intangible Assets [Line Items]
Useful life measured as period of time, property, plant and equipment	30 years
Plant and equipment (wind and solar power projects) \| Top of range [Member]
Disclosure Of Depreciation Amortization Of Tangible And Intangible Assets [Line Items]
Useful life measured as period of time, property, plant and equipment	35 years
Plant and equipment (others) \| Bottom of range [Member]
Disclosure Of Depreciation Amortization Of Tangible And Intangible Assets [Line Items]
Useful life measured as period of time, property, plant and equipment	5 years
Plant and equipment (others) \| Top of range [Member]
Disclosure Of Depreciation Amortization Of Tangible And Intangible Assets [Line Items]
Useful life measured as period of time, property, plant and equipment	18 years
Office Equipment [Member]
Disclosure Of Depreciation Amortization Of Tangible And Intangible Assets [Line Items]
Useful life measured as period of time, property, plant and equipment	5 years
Furniture and fixtures
Disclosure Of Depreciation Amortization Of Tangible And Intangible Assets [Line Items]
Useful life measured as period of time, property, plant and equipment	10 years
Computers
Disclosure Of Depreciation Amortization Of Tangible And Intangible Assets [Line Items]
Useful life measured as period of time, property, plant and equipment	3 years
Computer Servers
Disclosure Of Depreciation Amortization Of Tangible And Intangible Assets [Line Items]
Useful life measured as period of time, property, plant and equipment	6 years
Computer software \| Bottom of range [Member]
Disclosure Of Depreciation Amortization Of Tangible And Intangible Assets [Line Items]
Useful life measured as period of time, intangible assets other than goodwill	3 years
Computer software \| Top of range [Member]
Disclosure Of Depreciation Amortization Of Tangible And Intangible Assets [Line Items]
Useful life measured as period of time, intangible assets other than goodwill	6 years
Customer contracts
Disclosure Of Depreciation Amortization Of Tangible And Intangible Assets [Line Items]
Useful life measured as period of time, intangible assets other than goodwill	25 years
Development rights
Disclosure Of Depreciation Amortization Of Tangible And Intangible Assets [Line Items]
Useful life measured as period of time, intangible assets other than goodwill	25 years
Leasehold improvements
Disclosure Of Depreciation Amortization Of Tangible And Intangible Assets [Line Items]
Useful life measured as period of time, property, plant and equipment	5 years
Description of useful life, property, plant and equipment	5
Building (Temporary structure)
Disclosure Of Depreciation Amortization Of Tangible And Intangible Assets [Line Items]
Useful life measured as period of time, property, plant and equipment	3 years

Summary of Significant Accounting Policies - Summary of Depreciation and amortisation are calculated on a straight-line basis over the estimated useful lives of the assets (Parenthetical) (Detail)	Mar. 31, 2021
Bottom of range [Member]
Disclosure Of Depreciation Amortization Of Tangible And Intangible Assets [Line Items]
Property plant and equipment residual value as a percentage of original cost	0.00%
Intangible assets residual value as a percentage of original cost	0.00%
Top of range [Member]
Disclosure Of Depreciation Amortization Of Tangible And Intangible Assets [Line Items]
Property plant and equipment residual value as a percentage of original cost	5.00%
Intangible assets residual value as a percentage of original cost	5.00%

Summary of Significant Accounting Policies - Summary of Right-of-use assets (Detail)	12 Months Ended
	Mar. 31, 2021
Leasehold land \| Bottom of range [Member]
Disclosure of quantitative information about right-of-use assets [line items]
Right-of-use assets	13 years
Leasehold land \| Top of range [Member]
Disclosure of quantitative information about right-of-use assets [line items]
Right-of-use assets	30 years
Building \| Bottom of range [Member]
Disclosure of quantitative information about right-of-use assets [line items]
Right-of-use assets	3 years
Building \| Top of range [Member]
Disclosure of quantitative information about right-of-use assets [line items]
Right-of-use assets	5 years

Property, plant and equipment - Summary of Property, plant and equipment (Detail) - INR (₨) ₨ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Disclosure of detailed information about property, plant and equipment [line items]
Property, plant and equipment	₨ 340,645	₨ 299,402
Charge for the year	10,615	9,865	₨ 8,187
Property, plant and equipment	342,036	340,645	299,402
Freehold Land
Disclosure of detailed information about property, plant and equipment [line items]
Property, plant and equipment	9,890	8,705
Property, plant and equipment	10,531	9,890	8,705
Plant and equipment
Disclosure of detailed information about property, plant and equipment [line items]
Property, plant and equipment	312,613	274,169
Property, plant and equipment	320,865	312,613	274,169
Building
Disclosure of detailed information about property, plant and equipment [line items]
Property, plant and equipment	47	50
Property, plant and equipment	56	47	50
Leasehold improvements
Disclosure of detailed information about property, plant and equipment [line items]
Property, plant and equipment	79	99
Property, plant and equipment	57	79	99
Office Equipment [Member]
Disclosure of detailed information about property, plant and equipment [line items]
Property, plant and equipment	35	36
Property, plant and equipment	29	35	36
Furniture and fixtures
Disclosure of detailed information about property, plant and equipment [line items]
Property, plant and equipment	40	40
Property, plant and equipment	37	40	40
Computers
Disclosure of detailed information about property, plant and equipment [line items]
Property, plant and equipment	42	34
Property, plant and equipment	56	42	34
Capital work in progress
Disclosure of detailed information about property, plant and equipment [line items]
Property, plant and equipment	17,899	16,269
Property, plant and equipment	10,405	17,899	16,269
Cost
Disclosure of detailed information about property, plant and equipment [line items]
Property, plant and equipment	371,873	320,738
Additions during the year	54,573	98,947
Adjustments during the year	(290)	(312)
Disposals during the year	(286)	(127)
Capitalised during the year	(30,176)	(47,373)
Acquisition of subsidiaries	2,560
Disposal of subsidiary	(14,999)
Property, plant and equipment	383,255	371,873	320,738
Cost \| Freehold Land
Disclosure of detailed information about property, plant and equipment [line items]
Property, plant and equipment	9,890	8,705
Additions during the year	603	1,258
Adjustments during the year	(19)	(73)
Acquisition of subsidiaries	57
Property, plant and equipment	10,531	9,890	8,705
Cost \| Plant and equipment
Disclosure of detailed information about property, plant and equipment [line items]
Property, plant and equipment	343,679	295,406
Additions during the year	31,179	48,419
Adjustments during the year	(265)	(51)
Disposals during the year	(242)	(95)
Acquisition of subsidiaries	2,500
Disposal of subsidiary	(14,998)
Property, plant and equipment	361,853	343,679	295,406
Cost \| Building
Disclosure of detailed information about property, plant and equipment [line items]
Property, plant and equipment	65	65
Additions during the year	12
Property, plant and equipment	77	65	65
Cost \| Leasehold improvements
Disclosure of detailed information about property, plant and equipment [line items]
Property, plant and equipment	130	124
Additions during the year	5	6
Property, plant and equipment	135	130	124
Cost \| Office Equipment [Member]
Disclosure of detailed information about property, plant and equipment [line items]
Property, plant and equipment	67	56
Additions during the year	9	12
Adjustments during the year	(1)
Disposals during the year	(1)	(1)
Acquisition of subsidiaries	1
Disposal of subsidiary	(1)
Property, plant and equipment	74	67	56
Cost \| Furniture and fixtures
Disclosure of detailed information about property, plant and equipment [line items]
Property, plant and equipment	57	49
Additions during the year	7	8
Acquisition of subsidiaries	1
Property, plant and equipment	65	57	49
Cost \| Computers
Disclosure of detailed information about property, plant and equipment [line items]
Property, plant and equipment	86	64
Additions during the year	33	26
Adjustments during the year	(1)
Disposals during the year	(4)	(4)
Acquisition of subsidiaries	1
Disposal of subsidiary	0
Property, plant and equipment	115	86	64
Cost \| Capital work in progress
Disclosure of detailed information about property, plant and equipment [line items]
Property, plant and equipment	17,899	16,269
Additions during the year	22,725	49,218
Adjustments during the year	(4)	(188)
Disposals during the year	(39)	(27)
Capitalised during the year	(30,176)	(47,373)
Property, plant and equipment	10,405	17,899	16,269
Accumulated depreciation
Disclosure of detailed information about property, plant and equipment [line items]
Property, plant and equipment	31,228	21,336
Adjustments during the year		0
Disposals during the year	(40)	(5)
Disposal of subsidiary	(616)
Charge for the year	10,615	9,865
Depreciation capitalised during the year	32	32
Property, plant and equipment	41,219	31,228	21,336
Accumulated depreciation \| Plant and equipment
Disclosure of detailed information about property, plant and equipment [line items]
Property, plant and equipment	31,066	21,237
Adjustments during the year		0
Disposals during the year	(35)	0
Disposal of subsidiary	(615)
Charge for the year	10,568	9,827
Depreciation capitalised during the year	4	2
Property, plant and equipment	40,988	31,066	21,237
Accumulated depreciation \| Building
Disclosure of detailed information about property, plant and equipment [line items]
Property, plant and equipment	18	15
Charge for the year	3	3
Property, plant and equipment	21	18	15
Accumulated depreciation \| Leasehold improvements
Disclosure of detailed information about property, plant and equipment [line items]
Property, plant and equipment	51	25
Charge for the year	14	11
Depreciation capitalised during the year	13	15
Property, plant and equipment	78	51	25
Accumulated depreciation \| Office Equipment [Member]
Disclosure of detailed information about property, plant and equipment [line items]
Property, plant and equipment	32	20
Disposals during the year	(1)	(1)
Disposal of subsidiary	(1)
Charge for the year	9	7
Depreciation capitalised during the year	6	6
Property, plant and equipment	45	32	20
Accumulated depreciation \| Furniture and fixtures
Disclosure of detailed information about property, plant and equipment [line items]
Property, plant and equipment	17	9
Charge for the year	9	6
Depreciation capitalised during the year	2	2
Property, plant and equipment	28	17	9
Accumulated depreciation \| Computers
Disclosure of detailed information about property, plant and equipment [line items]
Property, plant and equipment	44	30
Disposals during the year	(4)	(4)
Disposal of subsidiary	0
Charge for the year	12	11
Depreciation capitalised during the year	7	7
Property, plant and equipment	₨ 59	₨ 44	₨ 30

Property, plant and equipment - Additional Information (Detail) - INR (₨) ₨ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Disclosure of detailed information about property, plant and equipment [line items]
Borrowing costs capitalised	₨ 2,072	₨ 1,928
Bottom of range [member]
Disclosure of detailed information about property, plant and equipment [line items]
Rate used to determine borrowing costs eligible for capitalisation	6.03%	6.03%
Top of range [member]
Disclosure of detailed information about property, plant and equipment [line items]
Rate used to determine borrowing costs eligible for capitalisation	15.02%	15.02%
Land [member]
Disclosure of detailed information about property, plant and equipment [line items]
Property, plant and equipment, Restrictions on title	₨ 379	₨ 395
Land [member] \| Adjustments To Property Plant And Equipment [Member]
Disclosure of detailed information about property, plant and equipment [line items]
Actualisation of provisional capitalisation	19	73
Land [member] \| General Power Of Attorney [Member]
Disclosure of detailed information about property, plant and equipment [line items]
Property, plant and equipment, Restrictions on title	429	510
Plant And Equipment [Member] \| Adjustments To Property Plant And Equipment [Member]
Disclosure of detailed information about property, plant and equipment [line items]
Actualisation of provisional capitalisation	265	51
Capital Work In Progress [Member]
Disclosure of detailed information about property, plant and equipment [line items]
Property, plant and equipment, Written off	39	27
Capital Work In Progress [Member] \| Adjustments To Property Plant And Equipment [Member]
Disclosure of detailed information about property, plant and equipment [line items]
Actualisation of provisional capitalisation	₨ 4	₨ 188

Intangible assets - Summary of Changes in Intangible Assets and Goodwill (Detail) - INR (₨)
₨ in Millions

12 Months Ended

Mar. 31, 2021

Mar. 31, 2020

Mar. 31, 2019

Disclosure of reconciliation of changes in intangible assets and goodwill [line items]

₨ 35,970

₨ 37,064

1,166

1,145

₨ 1,118

Disclosure of reconciliation of changes in intangible assets and goodwill [line items]

36,410

35,970

37,064

Cost

38,393

38,327

Capitalised during the year

350

(67)

(13)

1,338

Disclosure of reconciliation of changes in intangible assets and goodwill [line items]

40,014

38,393

38,327

Amortisation

2,423

1,263

Amortisation capitalised during the year

1,166

1,145

Disclosure of reconciliation of changes in intangible assets and goodwill [line items]

3,604

2,423

1,263

Computer software

Disclosure of reconciliation of changes in intangible assets and goodwill [line items]

140

Computer software | Cost

179

160

Computer software | Amortisation

272

179

160

Disclosure of reconciliation of changes in intangible assets and goodwill [line items]

Amortisation capitalised during the year

Disclosure of reconciliation of changes in intangible assets and goodwill [line items]

132

Customer contracts

24,418

25,547

Customer contracts | Cost

24,580

24,418

25,547

Disclosure of reconciliation of changes in intangible assets and goodwill [line items]

26,744

1,304

Customer contracts | Amortisation

28,048

26,744

Disclosure of reconciliation of changes in intangible assets and goodwill [line items]

2,326

1,197

Amortisation capitalised during the year

1,142

1,114

Disclosure of reconciliation of changes in intangible assets and goodwill [line items]

3,468

2,326

1,197

Development rights

Development rights | Cost

Disclosure of reconciliation of changes in intangible assets and goodwill [line items]

Development rights | Amortisation

Disclosure of reconciliation of changes in intangible assets and goodwill [line items]

Disclosure of reconciliation of changes in intangible assets and goodwill [line items]

Other intangible assets

Other intangible assets | Cost

Disclosure of reconciliation of changes in intangible assets and goodwill [line items]

Disclosure of reconciliation of changes in intangible assets and goodwill [line items]

Goodwill

11,381

Disclosure of reconciliation of changes in intangible assets and goodwill [line items]

11,596

11,381

Goodwill | Cost

11,381

215

Intangible asset under development

11,596

11,381

Disclosure of reconciliation of changes in intangible assets and goodwill [line items]

Intangible asset under development | Cost

Disclosure of reconciliation of changes in intangible assets and goodwill [line items]

Capitalised during the year

^[1]

(67)

(13)

₨ 55

₨ 53

₨ 6

[1]

Intangible assets - Summary of Break-Up for Goodwill and Intangible Assets (Detail) - INR (₨) ₨ in Millions	Mar. 31, 2021	Mar. 31, 2020
Ostro Energy Group [member] \| wind power segment [member]
Disclosure of information for cash-generating units [line items]
Goodwill	₨ 9,903	₨ 9,903
ReNew Vayu Urja KCT [member] \| wind power segment [member]
Disclosure of information for cash-generating units [line items]
Goodwill	756	756
Prathamesh Solarfarms [member] \| solar power segment [member]
Disclosure of information for cash-generating units [line items]
Goodwill	428	428
Others [member] \| Intangible assets under development [member]
Disclosure of information for cash-generating units [line items]
Goodwill	510	294
Intangible asset under development	₨ 59	₨ 53

Intangible assets - Summary of Information in Respect of Units for which Recoverable Amount Exceeds the Carrying Amount (Detail) - INR (₨) ₨ in Millions	Mar. 31, 2021	Mar. 31, 2020
Disclosure of information for cash-generating units [line items]
Amount by which unit's recoverable amount exceeds its carrying amount	₨ 7,592	₨ 6,515
wind power segment [member] \| Ostro Energy Group [member]
Disclosure of information for cash-generating units [line items]
Amount by which unit's recoverable amount exceeds its carrying amount	3,090	4,106
wind power segment [member] \| ReNew Vayu Urja (KCT) [member]
Disclosure of information for cash-generating units [line items]
Amount by which unit's recoverable amount exceeds its carrying amount	2,727	1,628
solar power segment [member] \| Prathamesh Solarfarms [member]
Disclosure of information for cash-generating units [line items]
Amount by which unit's recoverable amount exceeds its carrying amount	₨ 1,775	₨ 586

Intangible assets - Summary of Sensitivity Analysis for Cash Generating Unit (Detail)	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Disclosure Of Sensitivity Analysis For Cash Generating Unit [line Items]
Plant load factor (PLF), if plant load factor is reduced by	7.41%	4.87%
Revised rate of weighted average cost of capital [member]
Disclosure Of Sensitivity Analysis For Cash Generating Unit [line Items]
Discount rate: (Pre-tax WACC)	11.89	12.27

Intangible assets - Additional Information (Detail) - INR (₨) ₨ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Disclosure of detailed information about intangible assets [line items]
Term of agreement based on which discount rate is applied	25 years
Discount rate applied to cash flow projections	10.90%	11.40%
Cash genereating units, Amounts in excess of carrying amount	₨ 7,592	₨ 6,515
Impairment of goodwill
Discount rate used in value in use calculations	10.90%	11.40%
Intangible assets under development [member]
Disclosure of detailed information about intangible assets [line items]
Fair value of customer contracts for projects under development acquired as part of business combination	₨ 20
Customer-related intangible assets [member] \| Bottom of range [member]
Disclosure of detailed information about intangible assets [line items]
Remaining useful lives of finite lived intangible assets other than goodwill	17 years	18 years
Customer-related intangible assets [member] \| Top of range [member]
Disclosure of detailed information about intangible assets [line items]
Remaining useful lives of finite lived intangible assets other than goodwill	23 years	24 years

Right of use assets - Summary of Right of Use Assets (Detail) - INR (₨) ₨ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Disclosure of quantitative information about right-of-use assets [line items]
Beginning balance Right-of-use assets	₨ 4,655	₨ 4,447
Charge for the year	245	230	₨ 191
Ending balance Right-of-use assets	4,264	4,655	4,447
Leasehold land
Disclosure of quantitative information about right-of-use assets [line items]
Beginning balance Right-of-use assets	4,357	4,093
Ending balance Right-of-use assets	4,075	4,357	4,093
Building
Disclosure of quantitative information about right-of-use assets [line items]
Beginning balance Right-of-use assets	298	354
Ending balance Right-of-use assets	189	298	354
Cost
Disclosure of quantitative information about right-of-use assets [line items]
Beginning balance Right-of-use assets	5,223	4,720
Additions during the year	1,468	510
Deletions during the year		(7)
Acquisition of subsidiaries during the year	36
Modifications during the year	(26)
Disposal of subsidiary during the year	(1,745)
Ending balance Right-of-use assets	4,956	5,223	4,720
Cost \| Leasehold land
Disclosure of quantitative information about right-of-use assets [line items]
Beginning balance Right-of-use assets	4,726	4,270
Additions during the year	1,443	460
Deletions during the year		(4)
Acquisition of subsidiaries during the year	36
Modifications during the year
Disposal of subsidiary during the year	(1,745)
Ending balance Right-of-use assets	4,460	4,726	4,270
Cost \| Building
Disclosure of quantitative information about right-of-use assets [line items]
Beginning balance Right-of-use assets	497	450
Additions during the year	25	50
Deletions during the year		(3)
Acquisition of subsidiaries during the year
Modifications during the year	(26)
Disposal of subsidiary during the year
Ending balance Right-of-use assets	496	497	450
Depreciation
Disclosure of quantitative information about right-of-use assets [line items]
Beginning balance Right-of-use assets	568	273
Charge for the year	245	230
Depreciation capitalised during the year	54	65
Disposal of subsidiary during the year	(175)
Ending balance Right-of-use assets	692	568	273
Depreciation \| Leasehold land
Disclosure of quantitative information about right-of-use assets [line items]
Beginning balance Right-of-use assets	369	177
Charge for the year	191	192
Depreciation capitalised during the year
Disposal of subsidiary during the year	(175)
Ending balance Right-of-use assets	385	369	177
Depreciation \| Building
Disclosure of quantitative information about right-of-use assets [line items]
Beginning balance Right-of-use assets	199	96
Charge for the year	54	38
Depreciation capitalised during the year	54	65
Disposal of subsidiary during the year
Ending balance Right-of-use assets	₨ 307	₨ 199	₨ 96

Investment in jointly controlled entities - Summary of Joint Ventures (Detail) - INR (₨) ₨ in Millions	Mar. 31, 2021	Mar. 31, 2020
Disclosure Of Entities Under Joint Control [Line Items]
Investments accounted for using equity method		₨ 524
Aalok Solarfarms Limited
Disclosure Of Entities Under Joint Control [Line Items]
Investments accounted for using equity method		91
Heramba Renewables Limited
Disclosure Of Entities Under Joint Control [Line Items]
Investments accounted for using equity method		170
Abha Solarfarms Limited
Disclosure Of Entities Under Joint Control [Line Items]
Investments accounted for using equity method		89
Shreyas Solarfarms Limited
Disclosure Of Entities Under Joint Control [Line Items]
Investments accounted for using equity method		₨ 174

Investment in jointly controlled entities - Summary of Joint Ventures (Parenthetical) (Detail) - $ / shares	Mar. 31, 2021	Mar. 31, 2020
Aalok Solarfarms Limited
Disclosure Of Entities Under Joint Control [Line Items]
Investment owned number of shares		3,498,744
Face value of shares invested	$ 10
Heramba Renewables Limited
Disclosure Of Entities Under Joint Control [Line Items]
Investment owned number of shares		6,996,900
Face value of shares invested	$ 10
Abha Solarfarms Limited
Disclosure Of Entities Under Joint Control [Line Items]
Investment owned number of shares		3,498,744
Face value of shares invested	$ 10
Shreyas Solarfarms Limited
Disclosure Of Entities Under Joint Control [Line Items]
Investment owned number of shares		6,997,494
Face value of shares invested	$ 10

Financial assets - Disclosure of Financial Assets (Detail) - INR (₨) ₨ in Millions	Mar. 31, 2021	Mar. 31, 2020
Investment in unquoted compulsorily convertible debentures of entities under joint control
Non-current financial assets at fair value through profit or loss
Loans
Non-current loans and receivables	140	₨ 126
Others
Other non-current financial assets	2,999	142
Loans
Current loans and receivables	56	10
Others
Other current financial assets	3,697	2,718
Financial assets at fair value through profit or loss, category \| Investment In Convertible Debentures Non-Current
Investment in unquoted compulsorily convertible debentures of entities under joint control
Non-current financial assets at fair value through profit or loss		624
Financial assets measured at amortised cost
Loans
Non-current loans and receivables	140	126
Others
Other non-current financial assets	2,999	142
Loans
Current loans and receivables	56	10
Financial assets measured at amortised cost \| Security Deposits
Loans
Non-current loans and receivables	140	126
Financial assets measured at amortised cost \| Bank Deposits
Others
Other non-current financial assets	2,999	142
Financial assets measured at amortised cost \| Security deposits
Loans
Current loans and receivables	45	5
Financial assets measured at amortised cost \| Loans To Related Parties
Loans
Current loans and receivables	11	5
Financial assets measured at amortised cost \| Recoverable From Related Parties
Others
Other current financial assets		15
Financial assets measured at amortised cost \| Deferred Consideration Receivable
Others
Other current financial assets	1,936
Financial assets measured at amortised cost \| Advances Recoverable
Others
Other current financial assets	154	233
Financial assets measured at amortised cost \| Government Grant Receivable Viability Gap Funding
Others
Other current financial assets	302	387
Financial assets measured at amortised cost \| Government Grant Receivable Generation Based Incentive Receivable
Others
Other current financial assets	859	1,362
Financial assets measured at amortised cost \| Interest Accrued On Fixed Deposits
Others
Other current financial assets	394	607
Financial assets measured at amortised cost \| Others
Others
Other current financial assets	₨ 52	114
Abha Solarfarms Limited \| Financial assets at fair value through profit or loss, category \| Investment In Convertible Debentures Non-Current
Investment in unquoted compulsorily convertible debentures of entities under joint control
Non-current financial assets at fair value through profit or loss		104
Heramba Renewables Limited \| Financial assets at fair value through profit or loss, category \| Investment In Convertible Debentures Non-Current
Investment in unquoted compulsorily convertible debentures of entities under joint control
Non-current financial assets at fair value through profit or loss		208
Aalok Solarfarms Limited \| Financial assets at fair value through profit or loss, category \| Investment In Convertible Debentures Non-Current
Investment in unquoted compulsorily convertible debentures of entities under joint control
Non-current financial assets at fair value through profit or loss		104
Shreyas Solarfarms Limited \| Financial assets at fair value through profit or loss, category \| Investment In Convertible Debentures Non-Current
Investment in unquoted compulsorily convertible debentures of entities under joint control
Non-current financial assets at fair value through profit or loss		₨ 208

Financial assets - Disclosure of Financial Assets (Parenthetical) (Detail) - ₨ / shares	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Abha Solarfarms Limited
Disclosure of financial assets [line items]
Number of debentures purchased		1,040,625
Debentures, Rate of interest	10.70%	10.70%
Debentures purchased, Purchase price per debenture	₨ 100	₨ 100
Heramba Renewables Limited
Disclosure of financial assets [line items]
Number of debentures purchased		2,081,250
Debentures, Rate of interest	10.70%	10.70%
Debentures purchased, Purchase price per debenture	₨ 100	₨ 100
Aalok Solarfarms Limited
Disclosure of financial assets [line items]
Number of debentures purchased		1,040,625
Debentures, Rate of interest	10.70%	10.70%
Debentures purchased, Purchase price per debenture	₨ 100	₨ 100
Shreyas Solarfarms Limited
Disclosure of financial assets [line items]
Number of debentures purchased		2,081,070
Debentures, Rate of interest	10.70%	10.70%
Debentures purchased, Purchase price per debenture	₨ 100	₨ 100

Trade receivables - Summary of Non-Current Trade Receivables (Detail) - INR (₨) ₨ in Millions	Mar. 31, 2021	Mar. 31, 2020
Non-current
Non-current trade receivables	₨ 1,178
Non-current Trade Receivables
Non-current
Less: impairment allowances for bad and doubtful debts
Cost
Non-current
Non-current trade receivables	1,178
Cost \| Non-current Trade Receivables
Non-current
Non-current trade receivables	₨ 1,178

Trade receivables - Summary of Current Trade Receivables (Detail) - INR (₨) ₨ in Millions	Mar. 31, 2021	Mar. 31, 2020
Current Trade Receivables [Abstract]
Current trade receivables	₨ 34,802	₨ 25,914
Current Trade Receivables
Current Trade Receivables [Abstract]
Less: impairment allowances for bad and doubtful debts	(562)	(176)
Cost
Current Trade Receivables [Abstract]
Current trade receivables	35,364	26,090
Cost \| Current Trade Receivables
Current Trade Receivables [Abstract]
Current trade receivables	₨ 35,364	₨ 26,090

Trade receivables - Summary of Allowance For Credit Losses (Detail) - Trade receivables - Method of assessment of expected credit losses - INR (₨) ₨ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Disclosure Of Allowance For Credit Losses [Line Items]
Beginning Balance	₨ 176	₨ 106
Provision for expected credit losses for the year	386	70
Ending Balance	₨ 562	₨ 176

Trade receivables - Additional Information (Detail)	12 Months Ended
Trade receivables - Additional Information (Detail)	Mar. 31, 2021
Bottom of range \| Non-current Trade Receivables
Trade receivables [Line Items]
Trade receivables, Collection period	13 years
Interest rate on Trade receivables	8.25%
Bottom of range \| Current Trade Receivables
Trade receivables [Line Items]
Trade receivables, Collection period	7 days
Top of range \| Non-current Trade Receivables
Trade receivables [Line Items]
Trade receivables, Collection period	25 years
Interest rate on Trade receivables	10.41%
Top of range \| Current Trade Receivables
Trade receivables [Line Items]
Trade receivables, Collection period	60 days

Deferred tax assets (DTA) / deferred tax liabilities (DTL) (net) - Additional Information (Detail) - INR (₨) ₨ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Statement [Line Items]
Unabsorbed depreciation	₨ 0
Deferred tax asset utilisation of which is dependent on future taxable profits	₨ 1,611	₨ 1,465
Top of range
Statement [Line Items]
Tax losses, Offsetting period	8 years
Bottom of range
Statement [Line Items]
Tax losses, Offsetting period	5 years
Unabsorbed Depreciation And Tax Losses
Statement [Line Items]
Unabsorbed depreciation	₨ 129,232	107,074
Unabsorbed Depreciation
Statement [Line Items]
Unabsorbed depreciation	₨ 1,535	1,970
Unused tax credits
Statement [Line Items]
Description of Expiry year of Temporary difference, unused tax losses and unused tax credits	The expiry year of MAT credit is 8 to 15 years from the date of entitlement and deferred tax has been recognised on MAT credit which are expected to be utilised before the expiry year.
Temporary difference, unused tax losses and unused tax credits, Expiry terms	15 years
Unused tax credit	₨ 82	323
Deferred tax liability not recognized as parent control distribution of earning of subsidiaries available for distribution	15,783	7,746
Capital Losses
Statement [Line Items]
Unabsorbed depreciation	₨ 828
Temporary difference, unused tax losses and unused tax credits, Expiry terms	4 years
Group Tax Losses
Statement [Line Items]
Unabsorbed depreciation	₨ 7,586	2,092
Deferred tax asset utilisation of which is dependent on future taxable profits	₨ 34,016	₨ 28,096
Group Tax Losses \| Top of range
Statement [Line Items]
Temporary difference, unused tax losses and unused tax credits, Expiry terms	8 years
Group Tax Losses \| Bottom of range
Statement [Line Items]
Temporary difference, unused tax losses and unused tax credits, Expiry terms	5 years
India
Statement [Line Items]
Applicable tax rate	31.20%	31.20%	31.20%
India \| Unabsorbed Depreciation And Tax Losses
Statement [Line Items]
Unabsorbed depreciation	₨ 140,086	₨ 110,796
India \| Unused tax losses
Statement [Line Items]
Unabsorbed depreciation	₨ 10,854	₨ 3,606

Deferred tax assets (DTA) / deferred tax liabilities (DTL) (net) - Summary of Differed Tax Assets (Net) (Detail) - INR (₨) ₨ in Millions	Mar. 31, 2021	Mar. 31, 2020
Deferred Tax Assets [Abstract]
Deferred tax assets	₨ 1,611	₨ 1,465
Deferred Tax Liabilities [Abstract]
Deferred tax liabilities	10,808	10,166
Net Deferred Tax Assets
Deferred Tax Assets [Abstract]
Deferred tax assets (net)	1,611	1,465
Net Deferred Tax Assets \| Deferred Tax Assets
Deferred Tax Assets [Abstract]
Deferred tax assets	17,415	14,796
Net Deferred Tax Assets \| Deferred Tax Assets \| Compound financial instruments
Deferred Tax Assets [Abstract]
Deferred tax assets	31	140
Net Deferred Tax Assets \| Deferred Tax Assets \| Loss on mark to market of derivative instruments
Deferred Tax Assets [Abstract]
Deferred tax assets	222	7
Net Deferred Tax Assets \| Deferred Tax Assets \| Difference in written down value as per books of account and tax laws
Deferred Tax Assets [Abstract]
Deferred tax assets	1	1
Net Deferred Tax Assets \| Deferred Tax Assets \| Provision for decommissioning cost
Deferred Tax Assets [Abstract]
Deferred tax assets	1,246	1,030
Net Deferred Tax Assets \| Deferred Tax Assets \| Expected credit loss
Deferred Tax Assets [Abstract]
Deferred tax assets	54	18
Net Deferred Tax Assets \| Deferred Tax Assets \| Losses available for offsetting against future taxable income
Deferred Tax Assets [Abstract]
Deferred tax assets	15,173	12,430
Net Deferred Tax Assets \| Deferred Tax Assets \| Unused tax credit (MAT)
Deferred Tax Assets [Abstract]
Deferred tax assets	106	563
Net Deferred Tax Assets \| Deferred Tax Assets \| Provision for operation and maintenance equalisation
Deferred Tax Assets [Abstract]
Deferred tax assets	284	224
Net Deferred Tax Assets \| Deferred Tax Assets \| Lease liabilities
Deferred Tax Assets [Abstract]
Deferred tax assets	149	284
Net Deferred Tax Assets \| Deferred Tax Assets \| Financial guarantee contracts
Deferred Tax Assets [Abstract]
Deferred tax assets	24
Net Deferred Tax Assets \| Deferred Tax Assets \| Government Grant Viability Gap Funding
Deferred Tax Assets [Abstract]
Deferred tax assets	28	33
Net Deferred Tax Assets \| Deferred Tax Assets \| Others
Deferred Tax Assets [Abstract]
Deferred tax assets	97	66
Net Deferred Tax Assets \| Deferred Tax Liabilities
Deferred Tax Liabilities [Abstract]
Deferred tax liabilities	15,804	13,331
Net Deferred Tax Assets \| Deferred Tax Liabilities \| Compound financial instruments
Deferred Tax Liabilities [Abstract]
Deferred tax liabilities	6	5
Net Deferred Tax Assets \| Deferred Tax Liabilities \| Difference in written down value as per books of account and tax laws
Deferred Tax Liabilities [Abstract]
Deferred tax liabilities	15,407	11,773
Net Deferred Tax Assets \| Deferred Tax Liabilities \| Government Grant Viability Gap Funding
Deferred Tax Liabilities [Abstract]
Deferred tax liabilities	11
Net Deferred Tax Assets \| Deferred Tax Liabilities \| Others
Deferred Tax Liabilities [Abstract]
Deferred tax liabilities	1
Net Deferred Tax Assets \| Deferred Tax Liabilities \| Gain on mark to market of derivative instruments
Deferred Tax Liabilities [Abstract]
Deferred tax liabilities	81	1,074
Net Deferred Tax Assets \| Deferred Tax Liabilities \| Unamortised ancillary borrowing cost
Deferred Tax Liabilities [Abstract]
Deferred tax liabilities	169	226
Net Deferred Tax Assets \| Deferred Tax Liabilities \| Right of use asset
Deferred Tax Liabilities [Abstract]
Deferred tax liabilities	₨ 129	₨ 253

Deferred tax assets (DTA) / deferred tax liabilities (DTL) (net) - Summary of Deferred Tax Liabilities (Net) (Detail) - INR (₨) ₨ in Millions	Mar. 31, 2021	Mar. 31, 2020
Deferred Tax Liabilities [Abstract]
Deferred tax liabilities	₨ 10,808	₨ 10,166
Deferred Tax Assets [Abstract]
Deferred tax assets	1,611	1,465
Net Deferred Tax Liabilities
Deferred Tax Assets [Abstract]
Deferred tax liabilities (net)	10,808	10,166
Deferred Tax Liabilities \| Net Deferred Tax Liabilities
Deferred Tax Liabilities [Abstract]
Deferred tax liabilities	34,222	29,484
Deferred Tax Liabilities \| Net Deferred Tax Liabilities \| Gain on mark to market of derivative instruments
Deferred Tax Liabilities [Abstract]
Deferred tax liabilities	54	765
Deferred Tax Liabilities \| Net Deferred Tax Liabilities \| Difference in written down value as per books of account and tax laws
Deferred Tax Liabilities [Abstract]
Deferred tax liabilities	33,930	28,498
Deferred Tax Liabilities \| Net Deferred Tax Liabilities \| Unamortized ancillary borrowing cost
Deferred Tax Liabilities [Abstract]
Deferred tax liabilities	162	119
Deferred Tax Liabilities \| Net Deferred Tax Liabilities \| Right of use asset
Deferred Tax Liabilities [Abstract]
Deferred tax liabilities	52	68
Deferred Tax Liabilities \| Net Deferred Tax Liabilities \| Fair value gain on financial instruments
Deferred Tax Liabilities [Abstract]
Deferred tax liabilities	0	10
Deferred Tax Liabilities \| Net Deferred Tax Liabilities \| Others
Deferred Tax Liabilities [Abstract]
Deferred tax liabilities	24	24
Deferred Tax Assets \| Net Deferred Tax Liabilities
Deferred Tax Assets [Abstract]
Deferred tax assets	23,414	19,318
Deferred Tax Assets \| Net Deferred Tax Liabilities \| Unamortized ancillary borrowing cost
Deferred Tax Assets [Abstract]
Deferred tax assets	5	6
Deferred Tax Assets \| Net Deferred Tax Liabilities \| Others
Deferred Tax Assets [Abstract]
Deferred tax assets	6	1
Deferred Tax Assets \| Net Deferred Tax Liabilities \| Compound financial instruments
Deferred Tax Assets [Abstract]
Deferred tax assets	107	0
Deferred Tax Assets \| Net Deferred Tax Liabilities \| Loss on mark to market of derivative instruments
Deferred Tax Assets [Abstract]
Deferred tax assets	143	158
Deferred Tax Assets \| Net Deferred Tax Liabilities \| Provision for decommissioning cost
Deferred Tax Assets [Abstract]
Deferred tax assets	2,330	2,085
Deferred Tax Assets \| Net Deferred Tax Liabilities \| Expected credit loss
Deferred Tax Assets [Abstract]
Deferred tax assets	96	27
Deferred Tax Assets \| Net Deferred Tax Liabilities \| Losses available for offsetting against future taxable income
Deferred Tax Assets [Abstract]
Deferred tax assets	18,843	15,668
Deferred Tax Assets \| Net Deferred Tax Liabilities \| Unused tax credit (MAT)
Deferred Tax Assets [Abstract]
Deferred tax assets	1,248	695
Deferred Tax Assets \| Net Deferred Tax Liabilities \| Provision for operation and maintenance equalisation
Deferred Tax Assets [Abstract]
Deferred tax assets	411	410
Deferred Tax Assets \| Net Deferred Tax Liabilities \| Lease liabilities
Deferred Tax Assets [Abstract]
Deferred tax assets	61	57
Deferred Tax Assets \| Net Deferred Tax Liabilities \| Government grant (viability gap funding)
Deferred Tax Assets [Abstract]
Deferred tax assets	₨ 164	₨ 211

Deferred tax assets (DTA) / deferred tax liabilities (DTL) (net) - Summary of Reconciliation of Tax Expense and Accounting Profit Multiplied By Tax Rate (Detail) - INR (₨) ₨ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Disclosure Of Effective Tax Expense Income Reconciliation And Components Of Income Tax Expenses Income [Abstract]
Accounting profit before income tax	₨ (5,128)	₨ (623)	₨ 4,935
Tax at the India's tax rate of 31.2% applicable to the Parent (31 March 2020: 31.2%, 31 March 2019: 31.2%)	(1,600)	(194)	1,540
Disallowance under section 94B of the Income Tax Act	1,333	1,328	1,131
Compensation for loss of revenue			(65)
Interest on compound financial instrument	1,091	634	30
Tax rate differences	15	(96)	(308)
Changes in estimates on reasonable certainty for recoverability of tax losses	2,305	(1,426)	330
Change in estimates for recoverability of unused tax credits (MAT)	82	316
Adjustment of tax relating to earlier periods	174	291	(64)
On account of adoption of new tax ordinance
- Mat credit written off	48	938
- Recognition / reversal of deferred tax asset / deferred tax liability	(7)	83
Effect of tax holidays and other tax exemptions	(879)	271	(662)
Deferred tax asset written off on sale of subsidiary (refer note 39)	306
Reinstatement loss on loan having income taxable under income from other sources		74
Other non-deductible expenses	36	(61)	(131)
Current tax expense reported in the statement of profit or loss	785	486	1,186
Deferred tax expense reported in the statement of profit or loss	2,091	1,714	634
Adjustment of current tax relating to earlier years	28	(42)	(19)
Tax expense (income)	₨ 2,904	₨ 2,158	₨ 1,801

Deferred tax assets (DTA) / deferred tax liabilities (DTL) (net) - Summary of Reconciliation of Deferred Tax Assets and Deferred Tax Liabilities (Net) (Detail) - INR (₨) ₨ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Income / (expense) recognised in profit or loss	₨ 2,091	₨ 1,714	₨ 634
Deferred Tax Assets Or Deferred Tax Liabilities
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Opening balance	(8,701)	(5,103)	(4,668)
Income / (expense) recognised in profit or loss	(1,784)	(1,714)	(634)
Income / (expense) recognised in OCI	1,567	(1,852)	88
Income / (expense) recognised in equity		(32)
Income / (expense) recognised in profit or loss on sale of subsidiary	(307)
Addition through business combination	28		111
Closing balance	(9,197)	(8,701)	(5,103)
Deferred Tax Assets Or Deferred Tax Liabilities \| Compound financial instruments
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Opening balance	138	172	158
Income / (expense) recognised in profit or loss	(84)	(2)	14
Income / (expense) recognised in equity		(32)
Income / (expense) recognised in profit or loss on sale of subsidiary	80
Closing balance	134	138	172
Deferred Tax Assets Or Deferred Tax Liabilities \| Gain / (loss) on mark to market of derivative instruments
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Opening balance	(1,671)	185	93
Income / (expense) recognised in profit or loss	(7)	0
Income / (expense) recognised in OCI	1,905	(1,856)	92
Closing balance	227	(1,671)	185
Deferred Tax Assets Or Deferred Tax Liabilities \| Difference in written down value as per books of account and tax laws
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Opening balance	(40,272)	(34,254)	(21,644)
Income / (expense) recognised in profit or loss	(8,782)	(6,018)	(12,721)
Income / (expense) recognised in profit or loss on sale of subsidiary	366
Addition through business combination	(649)		111
Closing balance	(49,337)	(40,272)	(34,254)
Deferred Tax Assets Or Deferred Tax Liabilities \| Unamortised ancillary borrowing cost
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Opening balance	(339)	(225)	(218)
Income / (expense) recognised in profit or loss	19	(114)	(7)
Addition through business combination	(5)
Closing balance	(325)	(339)	(225)
Deferred Tax Assets Or Deferred Tax Liabilities \| Security deposit
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Opening balance			41
Income / (expense) recognised in profit or loss			(41)
Deferred Tax Assets Or Deferred Tax Liabilities \| Provision for decommissioning cost
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Opening balance	3,115	2,738	1,819
Income / (expense) recognised in profit or loss	482	377	919
Income / (expense) recognised in profit or loss on sale of subsidiary	(26)
Addition through business combination	4
Closing balance	3,575	3,115	2,738
Deferred Tax Assets Or Deferred Tax Liabilities \| Expected credit loss
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Opening balance	44	27	11
Income / (expense) recognised in profit or loss	105	17	16
Income / (expense) recognised in profit or loss on sale of subsidiary	(1)
Closing balance	148	44	27
Deferred Tax Assets Or Deferred Tax Liabilities \| Fair value gain on financial instruments
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Opening balance	(9)	0	(188)
Income / (expense) recognised in profit or loss	(8)	(9)	188
Income / (expense) recognised in profit or loss on sale of subsidiary	17
Closing balance	0	(9)	0
Deferred Tax Assets Or Deferred Tax Liabilities \| Losses available for offsetting against future taxable income
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Opening balance	28,098	23,038	13,549
Income / (expense) recognised in profit or loss	6,304	5,060	9,489
Income / (expense) recognised in OCI	(339)
Income / (expense) recognised in profit or loss on sale of subsidiary	(719)
Addition through business combination	675
Closing balance	34,019	28,098	23,038
Deferred Tax Assets Or Deferred Tax Liabilities \| Unused tax credit (MAT)
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Opening balance	1,258	2,465	1,244
Income / (expense) recognised in profit or loss	95	(1,207)	1,221
Closing balance	1,353	1,258	2,465
Deferred Tax Assets Or Deferred Tax Liabilities \| Provision for operation and maintenance equalisation
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Opening balance	633	454	432
Income / (expense) recognised in profit or loss	60	179	22
Addition through business combination	2
Closing balance	695	633	454
Deferred Tax Assets Or Deferred Tax Liabilities \| Lease liabilities
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Opening balance	342	352	150
Income / (expense) recognised in profit or loss	21	(10)	202
Income / (expense) recognised in profit or loss on sale of subsidiary	(157)
Addition through business combination	4
Closing balance	210	342	352
Deferred Tax Assets Or Deferred Tax Liabilities \| Financial guarantee contracts
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Income / (expense) recognised in profit or loss	24
Closing balance	24
Deferred Tax Assets Or Deferred Tax Liabilities \| Government grant (viability gap funding)
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Opening balance	244	255
Income / (expense) recognised in profit or loss	(63)	(11)	255
Closing balance	181	244	255
Deferred Tax Assets Or Deferred Tax Liabilities \| Right of use asset
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Opening balance	(321)	(322)	(138)
Income / (expense) recognised in profit or loss	11	1	(184)
Income / (expense) recognised in profit or loss on sale of subsidiary	133
Addition through business combination	(4)
Closing balance	(181)	(321)	(322)
Deferred Tax Assets Or Deferred Tax Liabilities \| Option premium
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Opening balance		(31)
Income / (expense) recognised in profit or loss		31	(31)
Closing balance			(31)
Deferred Tax Assets Or Deferred Tax Liabilities \| Others
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Opening balance	39	43	23
Income / (expense) recognised in profit or loss	39	(8)	24
Income / (expense) recognised in OCI	1	4	(4)
Addition through business combination	1
Closing balance	₨ 80	₨ 39	₨ 43

Prepayments - Summary of Current and Non-Current Prepayments Explanatory (Detail) - INR (₨) ₨ in Millions	Mar. 31, 2021	Mar. 31, 2020
Non-current
Prepaid expenses	₨ 679	₨ 1,205
Total	679	1,205
Current
Prepaid expenses	592	849
Total	₨ 592	₨ 849

Other Assets - Summary of Other Assets (Detail) - INR (₨) ₨ in Millions	Mar. 31, 2021	Mar. 31, 2020
Non-current
Capital advance	₨ 7,497	₨ 5,460
Advances recoverable	142	95
Security deposits	8	8
Balances with government authorities	68	99
Total	7,715	5,662
Current
Advances recoverable	1,553	1,061
Balances with government authorities	825	722
Contract asset	86	25
Total	₨ 2,464	₨ 1,808

Inventories - Summary of Inventories (Detail) - INR (₨) ₨ in Millions	Mar. 31, 2021	Mar. 31, 2020
Classes of current inventories [abstract]
Consumables and spares	₨ 833	₨ 609
Total	₨ 833	₨ 609

Derivative instruments - Summary of Derivative Instruments (Detail) - INR (₨) ₨ in Millions	Mar. 31, 2021	Mar. 31, 2020
Financial assets at FVTOCI - cash flow hedges
Derivative instruments	₨ 2,691	₨ 8,718
Total	₨ 2,691	₨ 8,718

Cash and bank balances - Summary of Cash And Cash Equivalents Explanatory (Detail) - INR (₨) ₨ in Millions	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Cash and cash equivalents [abstract]
Cash and cheque on hand	₨ 0	₨ 0	₨ 0
Balances with banks
- On current accounts	19,474	11,699	4,781
- Deposits with original maturity of less than 3 months	1,205	1,390	5,334
Total cash and cash equivalents	₨ 20,679	₨ 13,089	₨ 10,115	₨ 13,914

Cash and bank balances - Summary Of Bank Balances Other Than Cash And Cash Equivalents Explanatory (Detail) - INR (₨) ₨ in Millions	Mar. 31, 2021	Mar. 31, 2020
Bank Balances Other Than Cash And Cash Equivalents [Abstract]
Less: amount disclosed under financial assets (others) (refer note 9)	₨ (2,999)	₨ (142)
Balances with banks	26,506	31,203
Gross carrying amount
Bank Balances Other Than Cash And Cash Equivalents [Abstract]
Balances with banks	29,505	31,345
Not later than one year
Bank Balances Other Than Cash And Cash Equivalents [Abstract]
Balances with banks	26,506	31,203
Later than one year
Bank Balances Other Than Cash And Cash Equivalents [Abstract]
Balances with banks	₨ 2,999	₨ 142

Cash and bank balances - Additional Information (Detail) - INR (₨) ₨ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Fixed deposits under lien with various banks for the purpose of Debt Service Reserve Account and as margin money for the purpose of letter of credit / bank guarantee [Line Items]
Banking arrangements	₨ 14,037	₨ 8,282
Bottom of range
Fixed deposits under lien with various banks for the purpose of Debt Service Reserve Account and as margin money for the purpose of letter of credit / bank guarantee [Line Items]
Bank deposit, Maturity terms	7 days
Effective interest rate on Bank deposit	2.00%
Top of range
Fixed deposits under lien with various banks for the purpose of Debt Service Reserve Account and as margin money for the purpose of letter of credit / bank guarantee [Line Items]
Bank deposit, Maturity terms	3652 days
Effective interest rate on Bank deposit	8.66%

Share capital - Summary of Authorized Share Capital (Detail) - INR (₨) ₨ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Total Equity
Beginning balance	₨ 78,848	₨ 81,844
Ending balance	₨ 64,745	₨ 78,848
Authorized Share Capital
Total Equity
Beginning balance, shares	500,000,000	500,000,000
Increase during the year, shares	0	0
Ending balance, shares	500,000,000	500,000,000
Beginning balance	₨ 5,000	₨ 5,000
Increase during the year	0	0
Ending balance	₨ 5,000	₨ 5,000

The amount of residual interest in the assets of the entity after deducting all its liabilities.

Share capital - Summary of Compulsory Convertible Preference Shares (Detail) - Convertible Preference Shares [member] - INR (₨) ₨ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Disclosure Of Reconciliation Of Outstanding Share Capital [line Items]
Beginning balance, shares	60,000,000	0
Increase during the year	0	60,000,000
Ending balance, shares	60,000,000	60,000,000
Beginning balance	₨ 25,500	₨ 0
Increase during the year	0	25,500
Ending balance	₨ 25,500	₨ 25,500

Share capital - Summary of Issued Share Capital (Detail) - INR (₨) ₨ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Disclosure Of Reconciliation Of Issued Capital [line Items]
Beginning balance	₨ 3,799
Shares issued during the year			₨ 1
Ending balance	₨ 3,799	₨ 3,799
Ordinary shares
Disclosure Of Reconciliation Of Issued Capital [line Items]
Beginning balance, shares	379,924,556	379,924,556
Shares issued during the year, shares	0	0
Ending balance, shares	379,924,454	379,924,556	379,924,556
Beginning balance	₨ 3,799	₨ 3,799
Shares issued during the year	0	0
Ending balance	₨ 3,799	₨ 3,799	₨ 3,799

Share capital - Additional Information (Detail)	Mar. 31, 2021 ₨ / shares
Ordinary shares
Disclosure of classes of share capital [line items]
Par value per share	₨ 10
Convertible Preference Shares
Disclosure of classes of share capital [line items]
Par value per share	₨ 425

Other equity - Summary of Share Premium (Detail) - INR (₨) ₨ in Millions	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Disclosure Of Detailed Information About Share Premium Of Equity [line Items]
Total Equity	₨ 64,745	₨ 78,848	₨ 81,844	₨ 78,084
Share premium
Disclosure Of Detailed Information About Share Premium Of Equity [line Items]
Total Equity	₨ 67,165	₨ 67,165	₨ 67,165	₨ 66,376

The amount of residual interest in the assets of the entity after deducting all its liabilities.

Other equity - Summary of Hedge Reserve (Detail) - INR (₨) ₨ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Disclosure Of Detailed Information About Reserve Of Cash Flow Hedges Of Equity [line Items]
Beginning balance	₨ (1,086)
Ending balance	(5,224)	₨ (1,086)
Hedge reserve
Disclosure Of Detailed Information About Reserve Of Cash Flow Hedges Of Equity [line Items]
Beginning balance	(1,086)	(512)
OCI for the year	(4,072)	(636)
Attributable to non-controlling interests	(66)	62
Ending balance	₨ (5,224)	₨ (1,086)

Other equity - Summary of Share Based Payment Reserve (Detail) - INR (₨) ₨ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Disclosure Of Detailed Information About Reserve Of Share Based Payments Of Equity [line Items]
Beginning balance	₨ 1,161
Expense for the year	177	₨ 207	₨ 316
Repurchase of vested stock options	(646)
Ending balance	1,165	1,161
Share based payment reserve
Disclosure Of Detailed Information About Reserve Of Share Based Payments Of Equity [line Items]
Beginning balance	1,161	1,086
Expense for the year	177	207	316
Repurchase of vested stock options	(176)
Forfeiture of vested options	3	(132)
Ending balance	₨ 1,165	₨ 1,161	₨ 1,086

Other equity - Summary of Retained Earnings / (Losses) (Detail) - INR (₨) ₨ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Disclosure Of Detailed Information About Retained Earnings Of Equity [line Items]
Loss for the year	₨ (7,818)	₨ (2,696)	₨ 2,646
Acquisition of interest by NCI in subsidiaries	37	852
Repurchase of vested stock options	(646)
Others	(121)
Retained earnings / (losses)
Disclosure Of Detailed Information About Retained Earnings Of Equity [line Items]
Beginning balance	1,207	1,894
Loss for the year	(7,818)	(2,696)
Re-measurement loss on defined benefit plans (net of tax)	(7)	(9)
Forfeiture of vested options	(3)	132
Acquisition of interest by NCI in subsidiaries	29	5
Repurchase of vested stock options	(470)
Debenture redemption reserve created during the year	(117)	(33)
Debenture redemption reserve released on account of repayment of debentures	811	1,914
Others	(121)
Ending balance	₨ (6,489)	₨ 1,207	₨ 1,894

Other equity - Summary of Other Components of Equity (Detail) - INR (₨) ₨ in Millions	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Disclosure Of Detailed Information About Other Equity Interest Of Equity [line Items]
Other equity interest	₨ 1,661	₨ 2,279
Other equity interest
Disclosure Of Detailed Information About Other Equity Interest Of Equity [line Items]
Other equity interest	₨ 1,661	₨ 2,279	₨ 4,289

Other equity - Summary of Capital Reserve (Detail) - INR (₨) ₨ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Total equity
Beginning balance	₨ 78,848	₨ 81,844
Ending balance	64,745	78,848
Capital reserve
Total equity
Beginning balance	(29)	114
Amount utilised on acquisition of non-controlling interest		(143)
Gain on acquisition of non-controlling interest	78
Ending balance	₨ 49	₨ (29)

The amount of residual interest in the assets of the entity after deducting all its liabilities.

Other equity - Summary of Debenture Redemption Reserve (Detail) - INR (₨) ₨ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Total equity
Beginning balance	₨ 78,848	₨ 81,844
Ending balance	64,745	78,848
Debentures Redemption Reserve
Total equity
Beginning balance	2,296	4,177
Debenture redemption reserve created during the year	117	33
Debenture redemption reserve transferred to retained earnings during the year	(811)	(1,914)
Ending balance	₨ 1,602	₨ 2,296

The amount of residual interest in the assets of the entity after deducting all its liabilities.

Other equity - Summary of Debenture Redemption Reserve (Parenthetical) (Detail) - INR (₨) ₨ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Debentures Redemption Reserve
Disclosure Of Detailed Information About Debentures Redemption Reserve Of Equity [Line Items]
Shortfall in Debenture redemption reserve	₨ 663	₨ 216

Other equity - Summary of Foreign Currency Translation Reserve (Detail) - INR (₨) ₨ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Total equity
Beginning balance	₨ 78,848	₨ 81,844
Ending balance	64,745	78,848
Reserve of exchange differences on translation
Total equity
Beginning balance	12	(2)
Exchange differences on translation of foreign operations	(2)	14
Ending balance	₨ 10	₨ 12

The amount of residual interest in the assets of the entity after deducting all its liabilities.

Interest accrued but not due on debentures

Interest-bearing loans and borrowings - Additional Information (Detail) - INR (₨) ₨ in Thousands				12 Months Ended
	Nov. 02, 2020	Sep. 24, 2020	Sep. 23, 2020	Mar. 31, 2021	Jun. 30, 2020	Mar. 31, 2020
Disclosure Of Interest Bearing Loans And Borrowings [Line Items]
Amount of long term borrowings for which covenant could not be met				₨ 10,341,000		₨ 2,916,000
Waiver applied				3,664,000
Borrowings prepaid subsequently through refinancing				41,362,000
Zemira Renewables Private Limited
Disclosure Of Interest Bearing Loans And Borrowings [Line Items]
Borrowings, Yield percentage			14.45%
Borrowings		₨ 3,178,000		3,047,000
Principal amount for which moratorium period availed					₨ 29,000
Interest amount for which moratorium period availed					₨ 33,000
Issue of redeemable non convertible instruments			₨ 3,075,000
Repayment of borrowings	₨ 103,370	₨ 3,075,000
Zemira Renewables Private Limited \| Piramal Capital Housing Finance Limited
Disclosure Of Interest Bearing Loans And Borrowings [Line Items]
Borrowings				2,149,000
Zemira Renewables Private Limited \| PHLF INVEST Private Limited
Disclosure Of Interest Bearing Loans And Borrowings [Line Items]
Borrowings				898,000
Embedded Derivatives \| Financial liabilities at fair value through profit or loss, category
Disclosure Of Interest Bearing Loans And Borrowings [Line Items]
Financial liabilities at fair value				0
Secured Term Loans From Bank
Disclosure Of Interest Bearing Loans And Borrowings [Line Items]
Amount of long term borrowings for which covenant could not be met				₨ 3,895,000		2,916,000
Waiver received						2,916,000
Listed Senior Secured Notes \| Bottom of range [Member]
Disclosure Of Interest Bearing Loans And Borrowings [Line Items]
Borrowings, Repayment terms				September 2022
Listed Senior Secured Notes \| Top of range [Member]
Disclosure Of Interest Bearing Loans And Borrowings [Line Items]
Borrowings, Repayment terms				February 2027
Compulsory Convertible Preference Shares
Disclosure Of Interest Bearing Loans And Borrowings [Line Items]
Borrowings, Yield percentage				15.02%
Compulsory Convertible Preference Shares \| Series A Compulsory Convertible Preference Shares
Disclosure Of Interest Bearing Loans And Borrowings [Line Items]
Preferred rate of dividend				0.0001%
Threshold conversion term				3 years
Secured Term Loans From Financial Institutions
Disclosure Of Interest Bearing Loans And Borrowings [Line Items]
Amount of long term borrowings for which covenant could not be met				₨ 6,446,000		₨ 0

Interest-bearing loans and borrowings - Summary of Interest - Bearing Loans And Borrowings (Detail) - INR (₨) ₨ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Disclosure of Long term interest bearing loans and borrowings [Line Items]
Non convertible debentures (secured)	₨ 90,137	₨ 38,835
Compulsorily convertible debentures (unsecured)	809	553
Term loan from bank (secured)	44,269	40,258
Term loan from financial institutions (secured)	80,300	89,604
Senior secured notes	92,924	128,160
Compulsorily convertible preference shares	26,697	23,200
Interest-bearing loans and borrowings - total	335,136	320,610
Interest-bearing loans and borrowings - net	335,136	320,610
Current portion of Long term interest bearing loans and borrowings, Non convertible debentures (secured)	10,447	6,376
Current portion of Long term interest bearing loans and borrowings, Term loan from bank (secured)	6,888	13,666
Current portion of Long term interest bearing loans and borrowings, Term loan from financial institutions (secured)	13,119	2,884
Current portion of Long term interest bearing loans and borrowings, Interest-bearing loans and borrowings - total	30,454	22,926
Amount disclosed under the head ‘other current financial liabilities'	(30,454)	(22,926)
Interest-bearing loans and borrowings - net	₨ 0	₨ 0
Compulsorily Convertible Preference Shares
Disclosure of Long term interest bearing loans and borrowings [Line Items]
Nominal interest rate %	15.02%
Maturity	June 2022
Bottom of range [Member] \| Non Convertible Debentures Secured
Disclosure of Long term interest bearing loans and borrowings [Line Items]
Nominal interest rate %	6.03%
Maturity	March 2022
Bottom of range [Member] \| Compulsorily Convertible Debentures
Disclosure of Long term interest bearing loans and borrowings [Line Items]
Nominal interest rate %	8.00%
Maturity	June 2026
Bottom of range [Member] \| Term Loan From Bank Secured
Disclosure of Long term interest bearing loans and borrowings [Line Items]
Nominal interest rate %	8.21%
Maturity	December 2021
Bottom of range [Member] \| Term Loan From Financial Institutions
Disclosure of Long term interest bearing loans and borrowings [Line Items]
Nominal interest rate %	8.67%
Maturity	September 2030
Bottom of range [Member] \| Senior Secured Notes
Disclosure of Long term interest bearing loans and borrowings [Line Items]
Nominal interest rate %	6.06%
Maturity	September 2022
Top of range [Member] \| Non Convertible Debentures Secured
Disclosure of Long term interest bearing loans and borrowings [Line Items]
Nominal interest rate %	12.50%
Maturity	September 2034
Top of range [Member] \| Compulsorily Convertible Debentures
Disclosure of Long term interest bearing loans and borrowings [Line Items]
Nominal interest rate %	10.70%
Maturity	September 2036
Top of range [Member] \| Term Loan From Bank Secured
Disclosure of Long term interest bearing loans and borrowings [Line Items]
Nominal interest rate %	11.75%
Maturity	December 2038
Top of range [Member] \| Term Loan From Financial Institutions
Disclosure of Long term interest bearing loans and borrowings [Line Items]
Nominal interest rate %	12.10%
Maturity	March 2041
Top of range [Member] \| Senior Secured Notes
Disclosure of Long term interest bearing loans and borrowings [Line Items]
Nominal interest rate %	10.74%
Maturity	February 2027

Interest-bearing loans and borrowings - Summary of Compulsorily Convertible Debentures (Unsecured) Terms of Conversion of CCDs (Detail) - Unsecured Compulsorily Convertible Debentures [Member] ₨ in Millions	12 Months Ended
	Mar. 31, 2021 INR (₨)
Disclosure Of Detailed Information About Unsecured Compulsorily Convertible Debentures [Line Items]
Total proceeds	₨ 1,021
Abha Solar Farms Limited [Member]
Disclosure Of Detailed Information About Unsecured Compulsorily Convertible Debentures [Line Items]
Tenure (years)	10 years
Total proceeds	₨ 35
Maturity date	6 June 2026, 26 January 2027 and 24 May 2027
Interest coupon rate	10.70%
Moratorium period	24 months
Aalok Solar Farms Limited [Member]
Disclosure Of Detailed Information About Unsecured Compulsorily Convertible Debentures [Line Items]
Tenure (years)	10 years
Total proceeds	₨ 35
Maturity date	6 June 2026, 26 January 2027 and 24 May 2027
Interest coupon rate	10.70%
Moratorium period	24 months
Shreyas Solarfarms Limited
Disclosure Of Detailed Information About Unsecured Compulsorily Convertible Debentures [Line Items]
Tenure (years)	10 years
Total proceeds	₨ 69
Maturity date	8 June 2026 and 26 January 2027
Interest coupon rate	10.70%
Moratorium period	24 months
Heramba Renewables Limited
Disclosure Of Detailed Information About Unsecured Compulsorily Convertible Debentures [Line Items]
Tenure (years)	10 years
Total proceeds	₨ 69
Maturity date	26 January 2027 and 24 May 2027
Interest coupon rate	10.70%
Moratorium period	24 months
ReNew Mega Solar Private Limited
Disclosure Of Detailed Information About Unsecured Compulsorily Convertible Debentures [Line Items]
Tenure (years)	25 years
Total proceeds	₨ 193
Maturity date	22 August 2036 and 20 September 2036
Interest coupon rate	8.00%
Moratorium period	18 months
ReNew Solar Energy (Telangana) Private Limited
Disclosure Of Detailed Information About Unsecured Compulsorily Convertible Debentures [Line Items]
Tenure (years)	20 years
Total proceeds	₨ 620
Maturity date	20 September 2036
Interest coupon rate	8.00%
Moratorium period	18 months

Interest-bearing loans and borrowings - Summary of Non Creation of Charge On Securities Against Outstanding Loans (Detail) - Outstanding Funds For Which Non Creation Of Charges Applicable ₨ in Millions	Mar. 31, 2021 INR (₨)
Prathamesh Solarfarms Limited \| Yes Bank
Disclosure Of Non Creation Of Charge On Securities Against Outstanding Loans [Line Items]
Borrowings	₨ 1,522
Prathamesh Solarfarms Limited \| Rural Electrification Corporation
Disclosure Of Non Creation Of Charge On Securities Against Outstanding Loans [Line Items]
Borrowings	1,724
ReNew Solar Energy (Rajasthan) Private Limited \| Power Finance Corporation Limited
Disclosure Of Non Creation Of Charge On Securities Against Outstanding Loans [Line Items]
Borrowings	3,025
ReNew Solar Power Private Limited \| Indian Renewable Energy Development
Disclosure Of Non Creation Of Charge On Securities Against Outstanding Loans [Line Items]
Borrowings	5,513
Ostro Jaisalmer Private Limited \| Rural Electrification Corporation
Disclosure Of Non Creation Of Charge On Securities Against Outstanding Loans [Line Items]
Borrowings	778
Ostro Urja Wind Private Limited \| Rural Electrification Corporation
Disclosure Of Non Creation Of Charge On Securities Against Outstanding Loans [Line Items]
Borrowings	2,165
Ostro Dakshin Power Private Limited \| Rural Electrification Corporation
Disclosure Of Non Creation Of Charge On Securities Against Outstanding Loans [Line Items]
Borrowings	3,803
Ostro Dakshin Power Private Limited \| Ptc Financial Services Pvt. Ltd.
Disclosure Of Non Creation Of Charge On Securities Against Outstanding Loans [Line Items]
Borrowings	1,236
Ostro Andhra Wind Private Limited \| India Infrastructure Finance Co. Ltd
Disclosure Of Non Creation Of Charge On Securities Against Outstanding Loans [Line Items]
Borrowings	1,373
Ostro AP Wind Private Limited \| India Infrastructure Finance Co. Ltd
Disclosure Of Non Creation Of Charge On Securities Against Outstanding Loans [Line Items]
Borrowings	1,404
Ostro Madhya Wind Private Limited \| Rural Electrification Corporation
Disclosure Of Non Creation Of Charge On Securities Against Outstanding Loans [Line Items]
Borrowings	2,143
Badoni Power Private Limited \| Rural Electrification Corporation
Disclosure Of Non Creation Of Charge On Securities Against Outstanding Loans [Line Items]
Borrowings	852
AVP Powerinfra Private Limited \| Rural Electrification Corporation
Disclosure Of Non Creation Of Charge On Securities Against Outstanding Loans [Line Items]
Borrowings	795
Ostro Anantapur Private Limited \| Rural Electrification Corporation
Disclosure Of Non Creation Of Charge On Securities Against Outstanding Loans [Line Items]
Borrowings	3,344
ReNew Wind Energy Varekarwadi Private Limited \| Rural Electrification Corporation
Disclosure Of Non Creation Of Charge On Securities Against Outstanding Loans [Line Items]
Borrowings	₨ 2,172

Interest-bearing loans and borrowings - Summary of Compulsorily convertible preference shares (Detail) ₨ / shares in Units, ₨ in Millions	12 Months Ended
	Mar. 31, 2021 INR (₨) ₨ / shares shares	Mar. 31, 2021 USD ($)	Mar. 31, 2020 INR (₨)	Mar. 31, 2019 INR (₨)
Disclosure Of Detailed Information About Series A Compulsory Convertible Preference Shares Line Items [Line Items]
Amount received			₨ 20,903
Series A Compulsory Convertible Preference Shares
Disclosure Of Detailed Information About Series A Compulsory Convertible Preference Shares Line Items [Line Items]
Number of shares allotted \| shares	49,184,611
Amount received \| ₨	₨ 20,903
GS Wyvern Holding Limited \| Series A Compulsory Convertible Preference Shares
Disclosure Of Detailed Information About Series A Compulsory Convertible Preference Shares Line Items [Line Items]
Number of shares allotted \| shares	16,395,294
Face value \| ₨ / shares	₨ 425
Amount received \| ₨	₨ 6,968
Green Rock B Two Thousand And Fourteen Limited \| Series A Compulsory Convertible Preference Shares
Disclosure Of Detailed Information About Series A Compulsory Convertible Preference Shares Line Items [Line Items]
Number of shares allotted \| shares	16,318,729
Face value \| ₨ / shares	₨ 425
Amount received \| ₨	₨ 6,935
Canada Pension Plan Investment Board \| Series A Compulsory Convertible Preference Shares
Disclosure Of Detailed Information About Series A Compulsory Convertible Preference Shares Line Items [Line Items]
Number of shares allotted \| shares	16,470,588
Face value \| ₨ / shares	₨ 425
Amount received \| ₨	₨ 7,000

Interest-bearing loans and borrowings - Summary of Loan moratorium (Detail) ₨ in Millions	Mar. 27, 2020 INR (₨)
Ostro Andhra Wind Private Limited \| Indian Renewable Energy Development Agency Limited \| 30 June 2020
Disclosure Of Detailed Information About Loan Moratorium [Line Items]
Principal Amount For Which Moratorium Period Availed	₨ 12
Interest Amount For Which Moratorium Period Availed	₨ 18
Borrowings Moratorium Period Original Due Date	Jun. 30, 2020
Borrowings Moratorium Period Extended Due Date	Sep. 30, 2020
Borrowings Settlement Terms	As per the intimation received from the Lender dated 17 November 2020, Principle instalment outstanding for the quarter ended 30 June 2020 and interest outstanding for the month of June 2020 shall be deferred to 30 September 2033.
Ostro Andhra Wind Private Limited \| India Infrastructure Finance Corporation \| 30 June 2020
Disclosure Of Detailed Information About Loan Moratorium [Line Items]
Principal Amount For Which Moratorium Period Availed	₨ 9
Interest Amount For Which Moratorium Period Availed	₨ 13
Borrowings Moratorium Period Original Due Date	Jun. 30, 2020
Borrowings Moratorium Period Extended Due Date	Sep. 30, 2020
Borrowings Settlement Terms	As per the intimation received from the Lender dated 24 December 2020, Principle instalment outstanding for the quarter ended 30 June 2020 and interest outstanding for the month of June 2020 shall be deferred to last instalment in 1 July 2035.
Ostro Andhra Wind Private Limited \| Tata Clean tech Capital Limited \| 30 June 2020
Disclosure Of Detailed Information About Loan Moratorium [Line Items]
Principal Amount For Which Moratorium Period Availed	₨ 2
Interest Amount For Which Moratorium Period Availed	₨ 3
Borrowings Moratorium Period Original Due Date	Jun. 30, 2020
Borrowings Moratorium Period Extended Due Date	Sep. 30, 2020
Borrowings Settlement Terms	As per the intimation received from the Lender dated 11 January 2021, Principle instalment along with interest outstanding for the quarter ended 30 June 2020 shall be deferred and the original repayment schedule shall be extended by 3 months resulting in extending last payment date as per repayment schedule from 30 June 2033 to 30 September 2033.
ReNew Solar Energy (Rajasthan) Private Limited \| Power Finance Corporation Limited \| 15 April 2020
Disclosure Of Detailed Information About Loan Moratorium [Line Items]
Principal Amount For Which Moratorium Period Availed	₨ 0
Interest Amount For Which Moratorium Period Availed	₨ 30
Borrowings Moratorium Period Original Due Date	Apr. 15, 2020
Borrowings Settlement Terms	As intimated by the Lender vide letter dated 25 February 2021, the repayment date has been revised resulting in extending last payment date as per repayment schedule. Previously, the repayment date was 15 December 2038 which has now been revised to 15 February 2039 to 15 June 2039 and the deferred amount has been converted to additional loan.
ReNew Solar Energy (Rajasthan) Private Limited \| Power Finance Corporation Limited \| 15 May 2020
Disclosure Of Detailed Information About Loan Moratorium [Line Items]
Principal Amount For Which Moratorium Period Availed	₨ 0
Interest Amount For Which Moratorium Period Availed	₨ 28
Borrowings Moratorium Period Original Due Date	May 15, 2020
ReNew Solar Energy (Rajasthan) Private Limited \| Power Finance Corporation Limited \| 15 June 2020
Disclosure Of Detailed Information About Loan Moratorium [Line Items]
Principal Amount For Which Moratorium Period Availed	₨ 0
Interest Amount For Which Moratorium Period Availed	₨ 29
Borrowings Moratorium Period Original Due Date	Jun. 15, 2020
ReNew Solar Energy (Rajasthan) Private Limited \| Power Finance Corporation Limited \| 15 July 2020
Disclosure Of Detailed Information About Loan Moratorium [Line Items]
Principal Amount For Which Moratorium Period Availed	₨ 0
Interest Amount For Which Moratorium Period Availed	₨ 28
Borrowings Moratorium Period Original Due Date	Jul. 15, 2020
ReNew Solar Energy (Rajasthan) Private Limited \| Power Finance Corporation Limited \| 15 August 2020
Disclosure Of Detailed Information About Loan Moratorium [Line Items]
Principal Amount For Which Moratorium Period Availed	₨ 0
Interest Amount For Which Moratorium Period Availed	₨ 30
Borrowings Moratorium Period Original Due Date	Aug. 15, 2020
Ostro AP Wind Private Limited \| Indian Renewable Energy Development Agency Limited \| 30 June 2020
Disclosure Of Detailed Information About Loan Moratorium [Line Items]
Principal Amount For Which Moratorium Period Availed	₨ 12
Interest Amount For Which Moratorium Period Availed	₨ 21
Borrowings Moratorium Period Original Due Date	Jun. 30, 2020
Borrowings Moratorium Period Extended Due Date	Sep. 30, 2020
Borrowings Settlement Terms	As per the intimation received from the Lender dated 17 November 2020, Principle instalment outstanding for the quarter ended 30 June 2020 and interest outstanding for the month of June 2020 shall be deferred to 30 September 2033.
Ostro AP Wind Private Limited \| India Infrastructure Finance Corporation \| 30 June 2020
Disclosure Of Detailed Information About Loan Moratorium [Line Items]
Principal Amount For Which Moratorium Period Availed	₨ 9
Interest Amount For Which Moratorium Period Availed	₨ 14
Borrowings Moratorium Period Original Due Date	Jun. 30, 2020
Borrowings Moratorium Period Extended Due Date	Sep. 30, 2020
Borrowings Settlement Terms	As per the intimation received from the Lender dated 24 December 2020, Principle instalment outstanding for the quarter ended 30 June 2020 and interest outstanding for the month of June 2020 shall be deferred to last instalment in 1 July 2035.
Ostro AP Wind Private Limited \| Tata Clean tech Capital Limited \| 30 June 2020
Disclosure Of Detailed Information About Loan Moratorium [Line Items]
Principal Amount For Which Moratorium Period Availed	₨ 3
Interest Amount For Which Moratorium Period Availed	₨ 5
Borrowings Moratorium Period Original Due Date	Jun. 30, 2020
Borrowings Moratorium Period Extended Due Date	Sep. 30, 2020
Borrowings Settlement Terms	As per the intimation received from the Lender dated 11 January 2021, Principle instalment along with interest outstanding for the quarter ended 30 June 2020 shall be deferred and the original repayment schedule shall be extended by 3 months resulting in extending last payment date as per repayment schedule from 30 June 2033 to 30 September 2033.

Interest-bearing loans and borrowings - Summary of Information About Loan With Moratorium (Detail) ₨ in Millions	12 Months Ended
	Mar. 31, 2021 INR (₨)
Barclays Bank Plc. \| Ostro Mahawind Power Private Limited \| 31 May 2020
Disclosure Of Detailed Information About Loan With Moratorium Period Of Ninety Days [Line Items]
Moratorium availed on Principal	₨ 4,165
Moratorium availed on Interest	₨ 0
Original due date	May 31, 2020
Indian Renewable Energy Development Association Limited \| Vivasvat Solar Energy Private Limited \| 31 May 2020
Disclosure Of Detailed Information About Loan With Moratorium Period Of Ninety Days [Line Items]
Moratorium availed on Principal	₨ 0
Moratorium availed on Interest	₨ 5
Original due date	May 31, 2020
Indian Renewable Energy Development Association Limited \| Vivasvat Solar Energy Private Limited \| 30 April 2020
Disclosure Of Detailed Information About Loan With Moratorium Period Of Ninety Days [Line Items]
Moratorium availed on Principal	₨ 0
Moratorium availed on Interest	₨ 5
Original due date	Apr. 30, 2020
Indian Renewable Energy Development Association Limited \| Vivasvat Solar Energy Private Limited \| 30 June 2020
Disclosure Of Detailed Information About Loan With Moratorium Period Of Ninety Days [Line Items]
Moratorium availed on Principal	₨ 0
Moratorium availed on Interest	₨ 5
Original due date	Jun. 30, 2020
Indian Renewable Energy Development Association Limited \| ReNew Solar Power Private Limited \| 31 May 2020
Disclosure Of Detailed Information About Loan With Moratorium Period Of Ninety Days [Line Items]
Moratorium availed on Principal	₨ 0
Moratorium availed on Interest	₨ 5
Original due date	May 31, 2020
Indian Renewable Energy Development Association Limited \| ReNew Solar Power Private Limited \| 30 April 2020
Disclosure Of Detailed Information About Loan With Moratorium Period Of Ninety Days [Line Items]
Moratorium availed on Principal	₨ 0
Moratorium availed on Interest	₨ 5
Original due date	Apr. 30, 2020
Indian Renewable Energy Development Association Limited \| ReNew Solar Power Private Limited \| 30 June 2020
Disclosure Of Detailed Information About Loan With Moratorium Period Of Ninety Days [Line Items]
Moratorium availed on Principal	₨ 0
Moratorium availed on Interest	₨ 5
Original due date	Jun. 30, 2020
Indian Renewable Energy Development Association Limited \| ReNew Solar Power Private Limited \| 31 July 2020
Disclosure Of Detailed Information About Loan With Moratorium Period Of Ninety Days [Line Items]
Moratorium availed on Principal	₨ 0
Moratorium availed on Interest	₨ 5
Original due date	Jul. 31, 2020
PTC Financial Services \| ReNew Wind Energy Varekarwadi Private Limited \| 1 July 2020
Disclosure Of Detailed Information About Loan With Moratorium Period Of Ninety Days [Line Items]
Moratorium availed on Principal	₨ 0
Moratorium availed on Interest	₨ 5
Original due date	Jul. 01, 2020
PTC Financial Services \| ReNew Wind Energy Varekarwadi Private Limited \| 1 August 2020
Disclosure Of Detailed Information About Loan With Moratorium Period Of Ninety Days [Line Items]
Moratorium availed on Principal	₨ 0
Moratorium availed on Interest	₨ 5
Original due date	Aug. 01, 2020

Lease liabilities - Summary of Lease Liabilities (Detail) - INR (₨) ₨ in Millions	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Presentation of leases for lessee [abstract]
Lease liabilities	₨ 1,782	₨ 1,387	₨ 1,089
Lease liabilities	₨ 330	₨ 259	₨ 347

Other financial liabilities - Summary of Detailed Information About Other Noncurrent Financial Liabilities Explanatory (Detail) - INR (₨)
₨ in Millions

Mar. 31, 2021

Mar. 31, 2020

Non-current

₨ 132

Total

132

Current

Financial guarantee contracts

Financial liabilities at amortised cost

Current maturities of long term interest-bearing loans and borrowings (refer note 19)

^[1]

30,454

22,926

Others

Interest accrued but not due on borrowings

1,686

1,692

Interest accrued but not due on debentures

1,211

371

Capital creditors

9,001

8,926

Purchase consideration payable

191

272

Other payables

109

Total

₨ 42,622

₨ 34,296

[1]

For all long-term loan arrangements the Group has complied with the debt covenants except for long-term loan arrangements amounting to INR 10,341 as at 31 March 2021 (31 March 2020: INR 2,916), where the Group could not meet covenants with the effect that the liability became payable on demand. The Group has classified the liability as current. Further, for such borrowings outstanding as at 31 March 2021, the Group has received waiver for borrowings amounting to INR 6,446 and applied for waiver amounting to INR 3,664 (31 March 2020: the Group had subsequently received waiver from the lenders and the loan was fully repaid in November 2020).

Other financial liabilities - Summary of Detailed Information About Other Noncurrent Financial Liabilities Explanatory (Parenthetical) (Detail) - Long-term borrowings [member] - INR (₨) ₨ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Categories Of Noncurrent Financial Liabilities [Line Items]
Long term arrangements	₨ 10,341	₨ 2,916
Waiver received for loan	6,446	2,916
Waiver further applied	₨ 3,664	₨ 0

Deferred government grant -Summary of detailed Information about government grants (Detail) - INR (₨) ₨ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Deferred government grant [Abstract]
Opening balance	₨ 848	₨ 891
Adjustment during the year	(58)	(6)
Released to the statement of profit or loss	(32)	(37)
Total	758	848
Current	39	38
Non-current	719	810
Total	₨ 758	₨ 848

Employee benefit liabilities - Summary of employee benefit liabilities (Detail) - INR (₨) ₨ in Millions	Mar. 31, 2021	Mar. 31, 2020
Non-current
Provision for gratuity (refer note 40)	₨ 143	₨ 103
Total	143	103
Current
Provision for gratuity (refer note 40)	7	5
Provision for leave encashment	143	84
Share based payment liability (refer note 42(c))	102
Total	₨ 252	₨ 89

Contract liabilities - Summary of Contract Liabilities (Detail) - INR (₨) ₨ in Millions	Mar. 31, 2021	Mar. 31, 2020
Non-current
Deferred revenue	₨ 1,364
Total	1,364
Current
Deferred revenue	61	1
Total	₨ 61	₨ 1

Provisions - Summary of Provisions (Detail) - INR (₨) ₨ in Millions	Mar. 31, 2021	Mar. 31, 2020
Non-current provisions [abstract]
Provision for decommissioning costs	₨ 13,686	₨ 11,950
Total	13,686	11,950
Current
Others		4
Total		₨ 4

Provisions - Summary of Reconciliation of Changes In Provision for Decommissioning Costs (Detail) - Provision for decommissioning, restoration and rehabilitation costs [member] - INR (₨) ₨ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Disclosure of other provisions [line items]
Beginning balance	₨ 11,950	₨ 10,377
Arised during the year	1,071	1,049
Unwinding of discount and changes in discount rate	744	524
Acquisition of subsidiary	21
Disposal of subsidiary	(100)
Ending balance	₨ 13,686	₨ 11,950

Other liabilities - Summary of Other Liabilities (Detail) - INR (₨) ₨ in Millions	Mar. 31, 2021	Mar. 31, 2020
Non-current other liabilities
Provision for operation and maintenance equalisation	₨ 2,736	₨ 2,938
Security deposit received		2
Others	11	12
Total	2,747	2,952
Current other liabilities
Provision for operation and maintenance equalisation	490	435
Other payables
TDS payable	1,389	1,272
GST payable	367	331
Labour welfare fund payable	1	1
Provident fund payable	19	15
Total	₨ 2,266	₨ 2,054

Interest-bearing loans and borrowings1 - Summary of Interest-bearing loans and borrowings (Detail) - INR (₨) ₨ in Millions	Mar. 31, 2021	Mar. 31, 2020
Working capital term loan (secured)
Disclosure of detailed information about short term borrowings [line items]
Interest-bearing loans and borrowings	₨ 5,525	₨ 5,630
Loan from bank (secured)
Disclosure of detailed information about short term borrowings [line items]
Interest-bearing loans and borrowings		1,229
Acceptances (secured)
Disclosure of detailed information about short term borrowings [line items]
Interest-bearing loans and borrowings	2,169	603
Buyer's / supplier's credit (secured)
Disclosure of detailed information about short term borrowings [line items]
Interest-bearing loans and borrowings	2,949	4,496
Loan from related party (unsecured) (refer note 44)
Disclosure of detailed information about short term borrowings [line items]
Interest-bearing loans and borrowings		190
Total [Member]
Disclosure of detailed information about short term borrowings [line items]
Interest-bearing loans and borrowings	₨ 10,643	₨ 12,148

Interest bearing loans and borrowings1 - Additional Information (Detail)	12 Months Ended
	Mar. 31, 2021
Secured Loan from Bank [Member]
Disclosure of detailed information about borrowings [line items]
Borrowings, interest rate	10.35%
Borrowings repayment term	1 year
Percentage of equity and preference share capital pledged	51.00%
Unsecured Loan from Related Party [Member]
Disclosure of detailed information about borrowings [line items]
Borrowings, interest rate	8.00%
Secured Buyers Suppliers Credit [Member]
Disclosure of detailed information about borrowings [line items]
Borrowings, interest rate basis	12 month Libor plus 40 bps
Bottom of range [Member] \| Secured Working Capital Term Loan [Member]
Disclosure of detailed information about borrowings [line items]
Borrowings, interest rate	8.00%
Borrowings repayment term	30 days
Bottom of range [Member] \| Secured Acceptances [Member]
Disclosure of detailed information about borrowings [line items]
Acceptances Discount Rate	2.23%
Acceptences Maturity Term	3 months
Bottom of range [Member] \| Secured Buyers Suppliers Credit [Member]
Disclosure of detailed information about borrowings [line items]
Acceptences Maturity Term	3 months
Top of range [Member] \| Secured Working Capital Term Loan [Member]
Disclosure of detailed information about borrowings [line items]
Borrowings, interest rate	9.75%
Borrowings repayment term	365 days
Top of range [Member] \| Secured Acceptances [Member]
Disclosure of detailed information about borrowings [line items]
Acceptances Discount Rate	5.90%
Acceptences Maturity Term	12 months
Top of range [Member] \| Secured Buyers Suppliers Credit [Member]
Disclosure of detailed information about borrowings [line items]
Acceptences Maturity Term	12 months

Trade payables - Summary of Trade payables (Detail) - INR (₨) ₨ in Millions	Mar. 31, 2021	Mar. 31, 2020
Trade and other payables [abstract]
Trade payables	₨ 3,245	₨ 3,733

Derivative Instruments - Summary of Financial Liabilities (Detail) - Financial Liabilities Measured At Fair Value Through Other Comprehensive Income Category [Member] ₨ in Millions	Mar. 31, 2021 INR (₨)
Disclosure Of Derivative Instruments [Line Items]
Derivative financial liabilities	₨ 1,070
Derivative Instruments [Member]
Disclosure Of Derivative Instruments [Line Items]
Derivative financial liabilities	₨ 1,070

Revenue from contracts with customers - Summary of Revenue From Contracts With Customers (Detail) - INR (₨) ₨ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue from contracts with customers	₨ 48,187	₨ 48,412	₨ 43,144
Power [Member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue from contracts with customers	47,673	47,759	42,969
Management Shared Services [Member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue from contracts with customers	14	15	27
Engineering Procurement and Construction Service [Member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue from contracts with customers	434	543	82
Operation and Maintenance Services [Member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue from contracts with customers	37	16
Consultancy Service [Member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue from contracts with customers	26
Sale of Renewable Energy Certificates [Member]
Disclosure of disaggregation of revenue from contracts with customers [line items]
Revenue from contracts with customers	₨ 3	₨ 79	₨ 66

Revenue from contracts with customers - Additional information (Detail) - INR (₨) ₨ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Disclosure of disaggregation of revenue from contracts with customers [line items]
Transaction price allocated to the remaining performance obligations	₨ 39,801
Percentage of revenue to be recognized in next one year and the remaining thereafter	4.00%
Explanation of when entity expects to recognise transaction price allocated to remaining performance obligations as revenue	the group expects to recognise revenue of approximately 4% within the next one year and the remaining thereafter
Impairment losses on receivables arising from contracts with customers	₨ 386	₨ 82	₨ 61
Cost overruns recognized from contracts with customers	1,472	0
Cost overruns recognized from contracts with customers pending approvel	1,266	4,236
Revenue recognized from cost over runs	₨ 48	₨ 0

Revenue from contracts with customers - Summary of Contract Balances (Detail) - INR (₨) ₨ in Millions	Mar. 31, 2021	Mar. 31, 2020	Apr. 01, 2019
Disclosure of disaggregation of revenue from contracts with customers [abstract]
Trade receivables (refer note 10)	₨ 35,980	₨ 25,914	₨ 19,176
Contract assets (refer note 13)	86	25	1
Contract liabilities (refer note 24)	₨ 1,425	₨ 1	₨ 4

Other operating income - Summary of Other Operating Income (Detail) - INR (₨) ₨ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Schedule Of Other Operating Income [Abstract]
Income from leases	₨ 80	₨ 63	₨ 176
Income from sale of emission reduction certificates		15
Total	₨ 80	₨ 78	₨ 176

Finance income - Summary of Finance income (Detail) - INR (₨) ₨ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Interest Income For Amortised Cost [Abstract]
on fixed deposit with banks	₨ 1,563	₨ 2,044	₨ 1,393
on trade receivables	114
others	212	135	78
Gain on settlement of financial liabilities	1,465
Total	₨ 3,354	₨ 2,179	₨ 1,471

Other income - Summary of Other Income (Detail) - INR (₨) ₨ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Government grants other income
generation based incentive	₨ 1,846	₨ 2,098	₨ 2,288
viability gap funding	32	37	39
Compensation for loss of revenue	431	89	379
Gain on sale of intangibles	0	219
Insurance claim	63	34	41
Fair value change of mutual fund (including realised gain)			272
Fair value gain on investment (refer note 54)	27		77
Income tax refund	160
Gain on derivative instruments designated as cash flow hedge (net)	16
Miscellaneous income	295	157	15
Total	₨ 2,870	₨ 2,634	₨ 3,111

Employee benefits expense - Summary of Employee Benefits Expense (Detail) - INR (₨) ₨ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Classes of employee benefits expense [abstract]
Salaries, wages and bonus	₨ 949	₨ 785	₨ 728
Contribution to provident and other funds	50	37	41
Share based payments (refer note 42)	203	72	183
Gratuity expense (refer note 40)	15	13	13
Staff welfare expenses	42	44	43
Total	₨ 1,259	₨ 951	₨ 1,008

Depreciation and amortisation - Summary of Depreciation And Amortisation (Detail) - INR (₨) ₨ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Depreciation and amortisation expense [abstract]
Depreciation of property, plant and equipment (refer note 5)	₨ 10,615	₨ 9,865	₨ 8,187
Amortisation of intangible assets (refer note 6)	1,166	1,145	1,118
Depreciation of right of use assets (refer note 7)	245	230	191
Total	₨ 12,026	₨ 11,240	₨ 9,496

Other expenses - Summary of Other Expense (Detail) - INR (₨) ₨ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Disclosure Of Detailed Information About Other Expenses [Abstract]
Legal and professional fees	₨ 790	₨ 686	₨ 898
Corporate social responsibility	82	73	53
Travelling and conveyance	148	163	151
Lease rent relating to short term leases	22	24	23
Director's commission	15	9	15
Printing and stationery	3	2	2
Rates and taxes	235	191	158
Payment to auditors	63	51	72
Insurance	527	201	148
Operation and maintenance	3,935	3,488	2,667
Repair and maintenance	104	65	23
Loss on sale/damage of property plant and equipment	205	104	197
Bidding expenses	12	26	22
Advertising and sales promotion	30	22	8
Impairment of capital work in progress	39
Security charges	241	195	176
Communication costs	36	31	26
Impairment loss on assets of disposal group held for sale (refer note 39)	408
Impairment allowances for financial assets	416	82	61
Miscellaneous expenses	271	252	103
Total	₨ 7,582	₨ 5,665	₨ 4,804

Finance costs - Summary of Detailed Information About Finance Cost (Detail) - INR (₨) ₨ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Disclosure Of Detailed Information About Finance Cost [Abstract]
- term loans	₨ 14,916	₨ 14,575	₨ 12,402
- loan from related party (refer note 44)	19	15	12
- acceptance	49	499	667
- buyer's/supplier's credit	68	420	1,159
- on working capital demand loan	252	602	331
- non convertible debentures	5,274	6,140	6,485
- compulsorily convertible debentures (unsecured)	60	59	78
- commercial papers		11	405
- senior secured notes	10,791	7,938	4,357
- lease liabilities	113	105	26
- compulsory convertible preference shares	3,361	2,230
- others	9	17	16
Bank charges	428	411	376
Option premium amortisation	1,773	1,119	69
Loss on settlement of derivative instruments designated as cash flow hedge (net)	76	302	304
Unwinding of discount on provisions	745	524	329
Unamortised ancillary borrowing cost written off	347	520	523
Total	₨ 38,281	₨ 35,487	₨ 27,538

Finance costs - Additional information (Detail) - INR (₨) ₨ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Detailed Information About Finance Cost [Line Items]
Decrease in other expense	₨ 1,849	₨ 1,421	₨ 373
Increase in cash outflows from financing activities due to reclassification	1,293	1,119	69
Increase of cash inflows from operating activities due to reclassification	1,293	1,119	69
Increase In Finance Cost [Member]
Detailed Information About Finance Cost [Line Items]
Increase in Finance cost	₨ 1,849	₨ 1,421	₨ 373

Earnings / (loss) per share - Summary of Earning Per Share (Detail) - INR (₨)
₨ / shares in Units, ₨ in Millions

12 Months Ended

Mar. 31, 2021

Mar. 31, 2020

Mar. 31, 2019

Earnings per share [line items]

(Loss) / profit attributable to equity holders for basic earnings

₨ (7,818)

₨ (2,696)

₨ 2,646

Equity holders of the parent

(7,818)

(2,696)

2,646

(Loss) / profit attributable to equity holders of parent for basic EPS

₨ (7,818)

₨ (2,696)

₨ 2,646

Weighted average number of equity shares for calculating basic EPS

483,921,868

459,201,195

379,797,836

Basic (loss) / earnings per share (in INR)

₨ (16.16)

₨ (5.87)

₨ 6.97

Loss / profit attributable to equity holders of parent for diluted EPS

₨ (7,818)

₨ (2,696)

₨ 2,646

Weighted average number of equity shares for calculating diluted EPS

483,921,868

459,201,195

385,804,858

Diluted loss / earnings per share (in INR)

^[1]

₨ (16.16)

₨ (5.87)

₨ 6.86

Weighted average number of equity shares in calculating basic EPS

379,924,556

379,797,836

Effect of dilution in calculating basic EPS and diluted EPS

Compulsory convertible preference shares

103,997,312

79,276,639

Weighted average number of equity shares in calculating basic EPS

483,921,868

459,201,195

379,797,836

Effect of dilution in calculating diluted EPS

Convertible equity for employee stock option plan

7,476,734

4,866,286

6,007,022

Weighted average number of equity shares in calculating diluted EPS

491,398,602

464,067,481

385,804,858

[1]	Since the effect of conversion of employee stock option plan was anti-dilutive in the years ended 31 March 2021 and 2020, it has not been considered for the purpose of computing diluted EPS.

Disposal of subsidiary - Additional Information (Detail) - INR (₨) ₨ in Millions		12 Months Ended
	Feb. 15, 2021	Mar. 31, 2021	Mar. 31, 2020	Oct. 31, 2020
Disclosure of Disposal Groups Classified as Held For Sale [Line Items]
Deferred tax assets derecognized		₨ 1,611	₨ 1,465
Adyah Solar Energy Private Limited
Disclosure of Disposal Groups Classified as Held For Sale [Line Items]
Percentage of sale of shareholding interest in subsidiary				100.00%
Total consideration for sale of subsidiary	₨ 5,549	5,549
Net assets		5,957
Deferred tax assets derecognized		306
Cash contributed from operating activities by disposed group		1,120	1,061
Cash contributed from investing activities by disposed group		206	2,770
Cash contributed from financing activities by disposed group		₨ 1,354	₨ 1,727

Disposal of subsidiary - Summary of Assets and Liabilities of subsidiary at the Date of Disposal (Detail) - INR (₨) ₨ in Millions		12 Months Ended
	Feb. 15, 2021	Mar. 31, 2021	Mar. 31, 2020	Apr. 01, 2019	Mar. 31, 2019	Mar. 31, 2018
Assets
Property, plant and equipment		₨ 342,036	₨ 340,645
Right of use assets		4,264	4,655		₨ 4,447
Trade receivables		35,980	25,914	₨ 19,176
Bank balances other than cash and cash equivalents		26,506	31,203
Cash and cash equivalents		20,679	13,089		₨ 10,115	₨ 13,914
Other non-current assets		7,715	5,662
Prepayments (non-current)		679	1,205
Other current financial assets		3,697	2,718
Other current assets		2,464	1,808
Total assets		492,054	479,556
Liabilities
Others non-current financial liabilities		132
Long term provisions		13,686	11,950
Others current financial liabilities		42,622	34,296
Other current liabilities		2,266	2,054
Total liabilities		427,309	₨ 400,708
Adyah Solar Energy Private Limited
Liabilities
Net assets sold		5,957
Total consideration	₨ 5,549	5,549
Total impairment loss on assets of disposal group held for sale (presented under other expenses in statement of profit or loss)	408
Cash and cash equivalents	3,613	3,613
Deferred consideration receivable	1,936
Cash acquired on acquisition of control in jointly controlled entities	5,549	₨ 5,549
Assets at the Date of Disposal [Member] \| Adyah Solar Energy Private Limited \| Disposal groups classified as held for sale [member]
Assets
Property, plant and equipment	14,383
Right of use assets	1,571
Trade receivables	621
Bank balances other than cash and cash equivalents	392
Cash and cash equivalents	16
Other non-current assets	10
Prepayments (non-current)	37
Other current financial assets	2
Other current assets	25
Total assets	17,057
Liabilities at the Date of Disposal [Member] \| Adyah Solar Energy Private Limited \| Disposal groups classified as held for sale [member]
Liabilities
Interest-bearing loans and borrowings	10,336
Others non-current financial liabilities	596
Long term provisions	100
Others current financial liabilities	48
Other current liabilities	20
Total liabilities	11,100
Net assets sold	₨ 5,957

Disposal of subsidiary - Schedule of Results of Disposal of Subsidiary Included in Statement of Profit or Loss (Detail) - INR (₨) ₨ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Disclosure of Results of Disposal Included in Statement of Profit or Loss [Line Items]
Income	₨ 54,491	₨ 53,303	₨ 47,902
Expenses	(59,574)	(53,873)	(42,927)
Loss before tax	5,128	623	₨ (4,935)
Adyah Solar Energy Private Limited [Member]
Disclosure of Results of Disposal Included in Statement of Profit or Loss [Line Items]
Income	2,372	1,998
Expenses	(2,718)	(2,563)
Loss before tax	(346)	(565)
Income tax expense	229	113
Loss for the year	₨ (117)	₨ (452)

The income arising in the course of an entity's ordinary activities. Income is increases in assets, or decreases in liabilities, that result in increases in equity, other than those relating to contributions from holders of equity claims.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 8
-IssueDate 2020-01-01
-Paragraph 28
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2020-en-r&anchor=para_28_a&doctype=Standard
-URIDate 2020-01-01

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 8
-IssueDate 2020-01-01
-Paragraph 23
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2020-en-r&anchor=para_23_a&doctype=Standard
-URIDate 2020-01-01

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 8
-IssueDate 2020-01-01
-Paragraph 32
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2020-en-r&anchor=para_32&doctype=Standard
-URIDate 2020-01-01

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 8
-IssueDate 2020-01-01
-Paragraph 33
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2020-en-r&anchor=para_33_a&doctype=Standard
-URIDate 2020-01-01

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 8
-IssueDate 2020-01-01
-Paragraph 34
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2020-en-r&anchor=para_34&doctype=Standard
-URIDate 2020-01-01

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2020-01-01
-Paragraph 82
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_82_a&doctype=Standard
-URIDate 2020-01-01

Reference 7: http://www.xbrl.org/2003/role/exampleRef
-Name IAS
-Number 1
-IssueDate 2020-01-01
-Paragraph 103
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_103&doctype=Standard
-URIDate 2020-01-01

Reference 8: http://www.xbrl.org/2003/role/exampleRef
-Name IAS
-Number 1
-IssueDate 2020-01-01
-Paragraph 102
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_102&doctype=Standard
-URIDate 2020-01-01

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 5
-IssueDate 2020-01-01
-Paragraph 33
-Subparagraph b
-Clause i
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=5&code=ifrs-tx-2020-en-r&anchor=para_33_b_i&doctype=Standard
-URIDate 2020-01-01

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 12
-IssueDate 2020-01-01
-Paragraph B12
-Subparagraph b
-Clause v
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2020-en-r&anchor=para_B12_b_v&doctype=Appendix&subtype=B
-URIDate 2020-01-01

Reference 11: http://www.xbrl.org/2003/role/exampleRef
-Name IFRS
-Number 12
-IssueDate 2020-01-01
-Paragraph B10
-Subparagraph b
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2020-en-r&anchor=para_B10_b&doctype=Appendix&subtype=B
-URIDate 2020-01-01

+ Details

Disposal of subsidiary - Schedule of Impact on Cash Flow Statement on Disposal of Subsidiary (Detail) - Adyah Solar Energy Private Limited [Member] - INR (₨) ₨ in Millions		12 Months Ended
	Feb. 15, 2021	Mar. 31, 2021
Net cash inflow arising on disposal:
Consideration received in cash and cash equivalents	₨ 3,613	₨ 3,613
Less: cash and cash equivalents disposed		(16)
Total		₨ 3,597

Gratuity and other post-employment benefit plans - Additional Information (Detail) - Defined Benefit Gratuity Plan [Member]	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Disclosure of Information About Defined Benefit Plans [Line Items]
Defined benefit plans number of days of salary	15 days
Defined benefit plan minimum period to be considered for completed year of service	6 months
Defined benefit plans minimum number of completion years of service	5 years
Description of contractual agreement or stated policy for charging net defined benefit cost	Gratuity is computed as 15 days’ salary, for every completed year of service or part thereof in excess of 6 months and is payable on retirement/termination/resignation.
Weighted average duration of defined benefit obligation	13 years	13 years 3 months 25 days

Gratuity and other post-employment benefit plans - Summary of Employee Benefit Expense (Detail) - INR (₨) ₨ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Net employees benefit expense recognised in employee cost
Net benefit expense	₨ 15	₨ 13	₨ 13
Contribution to provident fund and other fund charged to statement of profit or loss (inclusive of amount capitalised in different projects)	50	37	41
Defined Benefit Gratuity Plan [Member]
Net employees benefit expense recognised in employee cost
Current service cost	31	25	25
Interest cost on benefit obligation	7	6	5
Net benefit expense	38	31	30
Net (expense) / income recognised in OCI	(8)	(13)	14
Defined Contribution Plan [Member]
Net employees benefit expense recognised in employee cost
Contribution to provident fund and other fund charged to statement of profit or loss (inclusive of amount capitalised in different projects)	₨ 108	₨ 89	₨ 70

Gratuity and other post-employment benefit plans - Summary of Defined Benefit Plan Liability Recognized in Statement of Financial Position (Detail) - Defined Benefit Gratuity Plan [Member] - INR (₨) ₨ in Millions	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Defined benefit liability
Present value of unfunded obligation	₨ 150	₨ 108
Net liability	₨ 150	₨ 108	₨ 75	₨ 53

Gratuity and other post-employment benefit plans - Summary of Change in Present Value of Defined Benefit Obligation (Detail) - Defined Benefit Gratuity Plan [Member] - INR (₨) ₨ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Changes in the present value of the defined benefit obligation
Opening defined benefit obligation	₨ 108	₨ 75	₨ 53
Current service cost	31	25	25
Interest cost	7	6	5
Benefits paid	(6)	(10)	0
Liabilities assumed / (settled)		(1)
Remeasurements during the year due to:
- Experience adjustments	7	2	(14)
- Change in financial assumptions	0	11	0
- Change in demographic assumptions		0	0
Liabilities net of planned assets assumed under business combination	3
Assets extinguished on curtailments/settlements			6
Closing defined benefit obligation	₨ 150	₨ 108	₨ 75

Gratuity and other post-employment benefit plans - Summary of Principal Assumptions Used in Defined Benefit Plan (Detail) - Defined Benefit Gratuity Plan [Member]	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Disclosure of Detailed Information About Principal Assumptions Used in Defined Benefit Plan [Line Items]
Discount rate	6.85%	6.85%	7.75%
Salary escalation	10.00%	10.00%	10.00%

Gratuity and other post-employment benefit plans - Summary of Sensitivity Analysis for Significant Actuarial Assumptions (Detail) - Defined Benefit Gratuity Plan [Member] - INR (₨) ₨ in Millions	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Actuarial Assumption of Discount Rates [Member]
Disclosure of sensitivity analysis for actuarial assumptions [line items]
Increase in discount rate	0.50%
Decrease in discount rate	0.50%
Increase in salary escalation	₨ 141	₨ 110	₨ 66
Decrease in salary escalation	₨ 159	97	76
Actuarial Assumption of Expected Rates of Salary Increases [Member]
Disclosure of sensitivity analysis for actuarial assumptions [line items]
Increase in discount rate	0.50%
Decrease in discount rate	0.50%
Increase in salary escalation	₨ 156	110	74
Decrease in salary escalation	₨ 144	₨ 97	₨ 67

Gratuity and other post-employment benefit plans - Summary of Maturity Analysis of Defined Benefit Payments (Detail) - INR (₨) ₨ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Within next 12 months [Member]
Disclosure of Information About Maturity Profile of Defined Benefit Obligation [Line Items]
Cash flow	₨ 7	₨ 5
From 2 to 5 years [Member]
Disclosure of Information About Maturity Profile of Defined Benefit Obligation [Line Items]
Cash flow	37	27
From 6 to 9 years [Member]
Disclosure of Information About Maturity Profile of Defined Benefit Obligation [Line Items]
Cash flow	40	36
10 years and beyond [Member]
Disclosure of Information About Maturity Profile of Defined Benefit Obligation [Line Items]
Cash flow	₨ 330	₨ 226

Leases - Additional Information (Detail)	12 Months Ended
Leases - Additional Information (Detail)	Mar. 31, 2021
Disclosure of quantitative information about right-of-use assets [line items]
Effective interest rate for lease liabilities	10.40%
Bottom of range [Member]
Disclosure of quantitative information about right-of-use assets [line items]
Lessee operating lease, term of contract	5 years
Top of range [Member]
Disclosure of quantitative information about right-of-use assets [line items]
Lessee operating lease, term of contract	30 years
Office Equipment [Member]
Disclosure of quantitative information about right-of-use assets [line items]
Lessee operating lease, term of contract	12 months

Leases - Summary of Carrying Amounts of Lease Liabilities Carried at Amortized Cost (Detail) - INR (₨) ₨ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Disclosure of quantitative information about right-of-use assets [line items]
Opening balance	₨ 1,646	₨ 1,436	₨ 1,034
Additions	1,101	410	1,943
Acquisition of subsidiary	17	0	0
Capitalised during the year	105
Accretion of interest	113	147	125
Lease modification during the year	(26)	0	0
Disposal of subsidiary	(596)	0	0
Payments	(248)	(347)	(1,666)
Closing balance	2,112	1,646	1,436
Current	330	259	347
Non-current	₨ 1,782	₨ 1,387	₨ 1,089

Share based payment - Schedule of Terms And Conditions of Share Based Payment Arrangement under Employee Stock Option Plan Schemes (Detail) d in Millions	12 Months Ended
	Mar. 31, 2021 d $ / shares	Mar. 31, 2020 d
Share Based Payment Arrangements [Line Items]
Number of options outstanding \| d	1	1
Vesting Period For Grants Share Based Payment Arrangement	5 years
Two Thousand Eighteen Stock Option Plan Modified
Share Based Payment Arrangements [Line Items]
Grant date	16 August 2019
Vesting period	Time linked vesting: Grants will vest in 5 years on quarterly basis which shall commence one year after the date of grant of options
Exercise period	Within 10 years from date of grant upon vesting
Exercise price	$ 400
Expiry date	16 August 2029
Settlement type	Equity settled
Two Thousand Eighteen Stock Option Plan Modified \| Time Linked Vesting
Share Based Payment Arrangements [Line Items]
Vesting Period For Grants Under Share Based Payment Arrangement Options	5 years
Percentage Of Grants Will Vest Under Share Based Payment Arrangement Options	50.00%
Percentage Of Remaining Grants Will Vest Under Share Based Payment Arrangement Options	50.00%
Vesting Period For Remaining Grants Under Share Based Payment Arrangement Options	5 years
Two Thousand Eighteen Stock Option Plan
Share Based Payment Arrangements [Line Items]
Grant date	Multiple
Vesting period	Time linked vesting: 50 % of grants will vest in 5 years as follows: i) One year from the date of grant, the Options for the first four quarters shall vest immediately. ii) Thereafter, vesting will continue on a quarterly basis for the unvested Options. Remaining 50% will vest at the end of 5 years from the date of grant.
Exercise period	Within 10 years from date of grant upon vesting
Exercise price	$ 420
Expiry date	24 April 2028 to 31 December 2030
Settlement type	Equity settled
Number of options outstanding \| d	1	1
Two Thousand Eighteen Stock Option Plan \| Bottom of range [member]
Share Based Payment Arrangements [Line Items]
Exercise price	$ 400
Two Thousand Eighteen Stock Option Plan \| Top of range [member]
Share Based Payment Arrangements [Line Items]
Exercise price	$ 415
Two Thousand Eighteen Stock Option Plan \| Time Linked Vesting
Share Based Payment Arrangements [Line Items]
Vesting Period For Grants Under Share Based Payment Arrangement Options	5 years
Percentage Of Grants Will Vest Under Share Based Payment Arrangement Options	50.00%
Percentage Of Remaining Grants Will Vest Under Share Based Payment Arrangement Options	50.00%
Vesting Period For Remaining Grants Under Share Based Payment Arrangement Options	5 years
Two Thousand Seventeen Stock Option Plan
Share Based Payment Arrangements [Line Items]
Grant date	Multiple
Vesting period	Time linked vesting: 50 % of grants will vest in 5 years as follows: i) One year from the date of grant, the Options for the first four quarters shall vest immediately. ii) Thereafter, vesting will continue on a quarterly basis for the unvested Options. Remaining 50% will vest at the end of 5 years from the date of grant.
Exercise period	Within 10 years from date of grant upon vesting
Exercise price	$ 340
Expiry date	10 April 2027 to 25 February 2028
Settlement type	Equity settled
Number of options outstanding \| d	9	10
Two Thousand Seventeen Stock Option Plan \| Time Linked Vesting
Share Based Payment Arrangements [Line Items]
Vesting Period For Grants Under Share Based Payment Arrangement Options	5 years
Two Thousand Seventeen Stock Option Plan \| Performance Linked Vesting
Share Based Payment Arrangements [Line Items]
Vesting Period For Grants Under Share Based Payment Arrangement Options	3 years
Two Thousand Sixteen Stock Option Plan
Share Based Payment Arrangements [Line Items]
Grant date	Multiple
Exercise period	Within 10 years from date of grant upon vesting
Exercise price	$ 205
Expiry date	30 September 2026
Settlement type	Equity settled
Number of options outstanding \| d	1	2
Two Thousand Sixteen Stock Option Plan \| Time Linked Vesting
Share Based Payment Arrangements [Line Items]
Vesting period	Time linked vesting: 5 years on quarterly basis effective from 1 December 2015 on completion of one year from the date of grant, the Options for the first seven quarters shall vest immediately. Thereafter, vesting will continue on quarterly basis for the unvested Options commencing from 1 December 2017.
Two Thousand Sixteen Stock Option Plan \| Performance Linked Vesting
Share Based Payment Arrangements [Line Items]
Vesting period	Performance linked vesting: The Options shall vest annually and shall be prorated over a period of 3 years from the date of grant and shall be subject to the EBITDA achieved by the Company for the last completed financial year. The vesting of the Options shall take place at the end of the first anniversary of the date of grant (Vesting date) and thereafter on 31 March 2018 and 31 March 2019 or at a later date when the audited financial statements of the Company are available.
Two Thousand Fourteen Stock Option Plan
Share Based Payment Arrangements [Line Items]
Grant date	Multiple
Vesting period	Time linked vesting: 5 years on quarterly basis which shall commence one year after the date of grant of option
Exercise period	Within 10 years from date of grant upon vesting
Expiry date	31 December 2022 to 01 January 2025
Settlement type	Equity settled
Number of options outstanding \| d	2	3
Two Thousand Fourteen Stock Option Plan \| Bottom of range [member]
Share Based Payment Arrangements [Line Items]
Exercise price	$ 100
Two Thousand Fourteen Stock Option Plan \| Top of range [member]
Share Based Payment Arrangements [Line Items]
Exercise price	$ 131
Two Thousand Fourteen Stock Option Plan \| Time Linked Vesting
Share Based Payment Arrangements [Line Items]
Vesting Period For Grants Under Share Based Payment Arrangement Options	5 years
Two Thousand Stock Option Plan
Share Based Payment Arrangements [Line Items]
Grant date	Multiple
Vesting period	Time linked vesting: 5 years from the grant date
Exercise period	Within 10 years from date of grant upon vesting
Exercise price	$ 100
Expiry date	30 September 2021 to 31 December 2022
Settlement type	Equity settled
Number of options outstanding \| d	1	1
Two Thousand Stock Option Plan \| Time Linked Vesting
Share Based Payment Arrangements [Line Items]
Vesting Period For Grants Under Share Based Payment Arrangement Options	5 years

Share based payment - Schedule of Movement of Options Outstanding under the share based payment schemes (Detail) Unit_pure in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Share Based Payment Arrangements [Line Items]
Outstanding at the beginning of the year	18	19	21
Granted during the year	1	1	1
Forfeited during the year	0	(2)	0
Repurchase during the year	(3)
Exercised during the year			(3)
Outstanding at the end of the year	16	18	19
Exercisable at the end of the year	8	9	9

Share based payment - Schedule of Information about Fair Value of Inputs to Option Pricing Model Share Options Granted (Detail) - INR (₨)	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Share Based Payment Arrangements [Line Items]
Dividend yield (%)	3.40%	2.90%	1.50%
Expected volatility (%)	22.00%	23.00%	15.00%
Risk–free interest rate (%)		6.53%
Weighted average remaining contractual life of options granted during current period	9 years 5 months 8 days	9 years 4 months 13 days	9 years 5 months 19 days
Weighted average share price (in INR)	₨ 471	₨ 415	₨ 415
Weighted average fair value (in INR)	₨ 133.01	₨ 110.43	₨ 121.84
Vested Stock Options At The Date of Repurchase [Member]
Share Based Payment Arrangements [Line Items]
Dividend yield (%)	3.40%
Expected volatility (%)	22.00%
Weighted average share price (in INR)	₨ 420
Cash Settled Share Based Payments [Member]
Share Based Payment Arrangements [Line Items]
Dividend yield (%)	3.40%
Expected volatility (%)	22.00%
Weighted average share price (in INR)	₨ 420
Bottom of range [member]
Share Based Payment Arrangements [Line Items]
Risk–free interest rate (%)	4.16%		7.70%
Bottom of range [member] \| Vested Stock Options At The Date of Repurchase [Member]
Share Based Payment Arrangements [Line Items]
Risk–free interest rate (%)	4.16%
Bottom of range [member] \| Cash Settled Share Based Payments [Member]
Share Based Payment Arrangements [Line Items]
Risk–free interest rate (%)	4.16%
Top of range [member]
Share Based Payment Arrangements [Line Items]
Risk–free interest rate (%)	5.92%		8.12%
Top of range [member] \| Vested Stock Options At The Date of Repurchase [Member]
Share Based Payment Arrangements [Line Items]
Risk–free interest rate (%)	5.92%
Top of range [member] \| Cash Settled Share Based Payments [Member]
Share Based Payment Arrangements [Line Items]
Risk–free interest rate (%)	5.92%

Share based payment - Summary of Detailed Information About Repurchase Of Vested Stock Options (Detail) ₨ in Millions	12 Months Ended
	Mar. 31, 2021 INR (₨)
Share Based Payment Arrangements Repurchase Of Vested Stock Options [Abstract]
Total consideration paid for repurchase of vested stock options	₨ 681
Fair value of the vested stock options repurchased, measured at the repurchase date, recognised in equity	650
Excess consideration paid recognised in statement of profit or loss	₨ 31

Share based payment - Summary of Expense Recognised For Employee Services Received during the Year (Detail) - INR (₨) ₨ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Expense from share-based payment transactions in which goods or services received did not qualify for recognition as assets [abstract]
Expense arising from equity-settled share-based payment transactions	₨ 189	₨ 206	₨ 316
Expense arising from repurchases vested stock options	31	0	0
Expense arising from cash settled share based payments transactions	102	0	0
Total expense arising from share-based payment transactions	₨ 322	₨ 206	₨ 316

Share based payment - Additional Information (Detail) ₨ / shares in Units, ₨ in Millions	12 Months Ended
	Mar. 31, 2021 INR (₨) shares ₨ / shares	Mar. 31, 2020 INR (₨) shares ₨ / shares	Mar. 31, 2019 ₨ / shares	Mar. 31, 2018
Share Based Payment Arrangements [Line Items]
Weighted average exercise price of options outstanding	₨ 303	₨ 280	₨ 258
Weighted average exercise price of options granted during the year	₨ 404	₨ 400	₨ 415
Number of options exercised during the year			3,000,000
Weighted average exercise price of options exercised during the year			₨ 205
Weighted average exercise price of options forfeited during the year	₨ 395	₨ 189	₨ 290
Weighted average exercise price of options repurchased during the year	157
Number of options repurchased during the year		0	0
Weighted average exercise price of exercisable options during the year	₨ 250	₨ 206	₨ 178
Weighted average remaining contractual life of options outstanding	5 years 9 months	6 years 3 months 18 days
Number of share options forfeited in share based payment arrangement	0	2,000,000	0
Number of Share options outstanding	16,000,000	18,000,000	19,000,000	21,000,000
Number of share options exercisable	8,000,000	9,000,000	9,000,000
Cash Settled Share Based Payments [Member]
Share Based Payment Arrangements [Line Items]
Carrying amount of the liability realting to the cash settled share based payments \| ₨	₨ 102	₨ 0
Number of share options vested in share based payment arrangement \| shares	0	0
Number of share options forfeited in share based payment arrangement \| shares	0	0
Number of Share options outstanding \| shares	2,592,557
Number of share options exercisable \| shares	0
One Time Partial Liquidity Scheme For Outstanding ESOPS [Member]
Share Based Payment Arrangements [Line Items]
Number of share options vested out of options granted are eligible for surrender of Shares per option under share based payment arrangement	₨ 420
Number of share options opted by employees for surrender \| shares	2,592,557
Surrendered options are subject to value adjustment per share	₨ 420
Top of range [member] \| One Time Partial Liquidity Scheme For Outstanding ESOPS [Member]
Share Based Payment Arrangements [Line Items]
Maximum percentage of options vested out of options granted under share based payment arrangement	40.00%

Group information - Summary of Subsidiaries (Detail)				12 Months Ended
Group information - Summary of Subsidiaries (Detail)	Mar. 28, 2020	Mar. 04, 2020	Jun. 19, 2019	Mar. 31, 2021	Mar. 31, 2020
ReNew Wind Energy (AP 3) Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Wind Energy (AP 3) Private Limited
Name of holding company				ReNew Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
ReNew Solar Power Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Solar Power Private Limited
Name of holding company				ReNew Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
ReNew Wind Energy MP Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Wind Energy (MP) Private Limited
Name of holding company				ReNew Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
ReNew Wind Energy Varekarwadi Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Wind Energy (Varekarwadi) Private Limited
Name of holding company				ReNew Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
ReNew Wind Energy Delhi Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Wind Energy Delhi Private Limited
Name of holding company				ReNew Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
ReNew Wind Energy Jamb Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Wind Energy (Jamb) Private Limited
Name of holding company				ReNew Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
ReNew Wind Energy Devgarh Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Wind Energy (Devgarh) Private Limited
Name of holding company				ReNew Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
ReNew Wind Energy (AP) Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Wind Energy (AP) Private Limited
Name of holding company				ReNew Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				70.00%	66.00%
Narmada Wind Energy Private Limited
Disclosure of subsidiaries [line items]
Name of companies				Narmada Wind Energy Private Limited
Name of holding company				ReNew Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
ReNew Wind Energy (Sipla) Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Wind Energy (Sipla) Private Limited
Name of holding company				ReNew Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
ReNew Solar Energy (Jharkhand One) Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Solar Energy (Jharkhand One) Private Limited
Name of holding company				ReNew Solar Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
ReNew Solar Energy (Jharkhand Three) Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Solar Energy (Jharkhand Three) Private Limited
Name of holding company				ReNew Solar Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary	51.00%			51.00%	51.00%
ReNew Solar Energy (Jharkhand Four) Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Solar Energy (Jharkhand Four) Private Limited
Name of holding company				ReNew Solar Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
ReNew Solar Energy (Jharkhand Five) Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Solar Energy (Jharkhand Five) Private Limited
Name of holding company				ReNew Solar Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
ReNew Wind Energy (Karnataka Two) Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Wind Energy (Karnataka Two) Private Limited
Name of holding company				ReNew Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
Abaha Wind Energy Developers Private Limited
Disclosure of subsidiaries [line items]
Name of companies				Abaha Wind Energy Developers Private Limited
Name of holding company				ReNew Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
ReNew Solar Energy Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Solar Energy Private Limited
Name of holding company				ReNew Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
ReNew Wind Energy (TN) Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Wind Energy (TN) Private Limited
Name of holding company				ReNew Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
ReNew Wind Energy Budh Three Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Wind Energy (Budh 3) Private Limited
Name of holding company				ReNew Solar Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
ReNew Wind Energy (MP One) Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Wind Energy (MP One) Private Limited
Name of holding company				ReNew Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
ReNew Solar Energy (Telangana) Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Solar Energy (Telangana) Private Limited
Name of holding company				ReNew Solar Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				51.00%	51.00%
ReNew Power Services Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Power Services Private Limited
Name of holding company				ReNew Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
ReNew Solar Energy (Karnataka Two) Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Solar Energy (Karnataka Two) Private Limited
Name of holding company				ReNew Solar Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
ReNew Wind Energy (Shivpur) Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Wind Energy (Shivpur) Private Limited
Name of holding company				ReNew Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
ReNew Wind Energy (Karnataka) Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Wind Energy (Karnataka) Private Limited
Name of holding company				ReNew Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				71.00%	64.00%
ReNew Wind Energy (Karnataka Three) Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Wind Energy (Karnataka 3) Private Limited
Name of holding company				ReNew Solar Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
ReNew Wind Energy (AP Five) Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Wind Energy (AP Five) Private Limited
Name of holding company				ReNew Solar Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
ReNew Saur Urja Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Saur Urja Private Limited
Name of holding company				ReNew Solar Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
Bhumi Prakash Private Limited
Disclosure of subsidiaries [line items]
Name of companies				Bhumi Prakash Private Limited
Name of holding company				ReNew Solar Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
Tarun Kiran Bhoomi Private Limited
Disclosure of subsidiaries [line items]
Name of companies				Tarun Kiran Bhoomi Private Limited
Name of holding company				ReNew Solar Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
ReNew Saur Shakti Private Limited (Formerly known as Surya Prakash Urja Bhoomi Private Limited)
Disclosure of subsidiaries [line items]
Name of companies				ReNew Saur Shakti Private Limited (Formerly known as Surya Prakash Urja Bhoomi Private Limited)
Name of holding company				ReNew Solar Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
ReNew Agni Power Private Limited (Formerly known as Bhanu Dhara Kiran Private Limited)
Disclosure of subsidiaries [line items]
Name of companies				ReNew Agni Power Private Limited (Formerly known as Bhanu Dhara Kiran Private Limited)
Name of holding company				ReNew Solar Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
ReNew Mega Solar Power Private Limited (Formerly known as Sun Season Private Limited)
Disclosure of subsidiaries [line items]
Name of companies				ReNew Mega Solar Power Private Limited (Formerly known as Sun Season Private Limited)
Name of holding company				ReNew Solar Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				51.00%	51.00%
ReNew Wind Energy (Rajasthan Two) Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Wind Energy (Rajasthan 2) Private Limited
Name of holding company				ReNew Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
ReNew Wind Energy (MP Two) Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Wind Energy (MP Two) Private Limited
Name of holding company				ReNew Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
ReNew Wind Energy (Jath Three) Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Wind Energy (Jath Three) Private Limited
Name of holding company				ReNew Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
ReNew Wind Energy (Karnataka Four) Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Wind Energy (Karnataka 4) Private Limited
Name of holding company				ReNew Solar Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
ReNew Wind Energy (Maharashtra) Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Wind Energy (Maharashtra) Private Limited
Name of holding company				ReNew Solar Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
ReNew Wind Energy (MP Four) Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Wind Energy (MP Four) Private Limited
Name of holding company				ReNew Solar Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
ReNew Wind Energy (APTwo) Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Wind Energy (AP2) Private Limited
Name of holding company				ReNew Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
ReNew Wind Energy (Orissa) Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Wind Energy (Orissa) Private Limited
Name of holding company				ReNew Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
ReNew Wind Energy (AP Four) Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Wind Energy (AP 4) Private Limited
Name of holding company				ReNew Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
ReNew Wind Energy (Jadeswar) Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Wind Energy (Jadeswar) Private Limited
Name of holding company				ReNew Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
ReNew Wind Energy (Welturi) Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Wind Energy (Welturi) Private Limited
Name of holding company				ReNew Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
ReNew Solar Services Private Limited (Formerly known as ReNew Wind Energy (Vaspet 4) Private Limited)
Disclosure of subsidiaries [line items]
Name of companies				ReNew Solar Services Private Limited (Formerly known as ReNew Wind Energy (Vaspet 4) Private Limited)
Name of holding company				ReNew Solar Energy Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
ReNew Solar Energy (Rajasthan) Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Solar Energy (Rajasthan) Private Limited
Name of holding company				ReNew Solar Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
ReNew Wind Energy (Vaspet Five) Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Wind Energy (Vaspet 5) Private Limited
Name of holding company				ReNew Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
ReNew Solar Energy (Karnataka) Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Solar Energy (Karnataka) Private Limited
Name of holding company				ReNew Solar Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary			100.00%	100.00%	100.00%
ReNew Wind Energy (TN Two) Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Wind Energy (TN 2) Private Limited
Name of holding company				ReNew Solar Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
ReNew Wind Energy (Rajkot) Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Wind Energy (Rajkot) Private Limited
Name of holding company				ReNew Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
ReNew Wind Energy (Rajasthan) Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Wind Energy (Rajasthan) Private Limited
Name of holding company				ReNew Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
ReNew Akshay Urja Limited (Formerly known as ReNew Akshay Urja Private Limited)
Disclosure of subsidiaries [line items]
Name of companies				ReNew Akshay Urja Limited (Formerly known as ReNew Akshay Urja Private Limited)
Name of holding company				ReNew Solar Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	56.00%
ReNew Wind Energy (Jath) Limited (Formerly known as ReNew Wind Energy (Jath) Private Limited)
Disclosure of subsidiaries [line items]
Name of companies				ReNew Wind Energy (Jath) Limited (Formerly known as ReNew Wind Energy (Jath) Private Limited)
Name of holding company				ReNew Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
ReNew Wind Energy (Rajasthan One) Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Wind Energy (Rajasthan One) Private Limited
Name of holding company				ReNew Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
ReNew Wind Energy (Rajasthan Three) Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Wind Energy (Rajasthan 3) Private Limited
Name of holding company				ReNew Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
ReNew Solar Energy (TN) Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Solar Energy (TN) Private Limited
Name of holding company				ReNew Solar Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
ReNew Wind Energy (Karnataka Five) Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Wind Energy (Karnataka Five) Private Limited
Name of holding company				ReNew Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
ReNew Wind Energy (MP Three) Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Wind Energy (MP Three) Private Limited
Name of holding company				ReNew Solar Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
ReNew Wind Energy (Rajasthan Four) Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Wind Energy (Rajasthan Four) Private Limited
Name of holding company				ReNew Solar Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
ReNew Clean Energy Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Clean Energy Private Limited
Name of holding company				ReNew Solar Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
ReNew Distributed Solar Energy Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Distributed Solar Energy Private Limited
Name of holding company				ReNew Solar Energy Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
ReNew Distributed Solar Services Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Distributed Solar Services Private Limited
Name of holding company				ReNew Solar Energy Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
ReNew Distributed Solar Power Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Distributed Solar Power Private Limited
Name of holding company				ReNew Solar Energy Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
ReNew Surya Mitra Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Surya Mitra Private Limited
Name of holding company				ReNew Solar Energy Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary		1.39%		68.00%	1.00%
ReNew Surya Prakash Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Surya Prakash Private Limited
Name of holding company				ReNew Solar Energy Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
ReNew Saur Vidyut Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Saur Vidyut Private Limited
Name of holding company				ReNew Solar Energy Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
ReNew Solar Daylight Energy Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Solar Daylight Energy Private Limited
Name of holding company				ReNew Solar Energy Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
ReNew Solar Sun Flame Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Solar Sun Flame Private Limited
Name of holding company				ReNew Solar Energy Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
ReNew Power Singapore Pte. Ltd
Disclosure of subsidiaries [line items]
Name of companies				ReNew Power Singapore Pte. Ltd.
Name of holding company				ReNew Power Private Limited
Country of incorporation				Singapore
Proportion of ownership interest in subsidiary				100.00%	100.00%
Abha Sunlight Private Limited
Disclosure of subsidiaries [line items]
Name of companies				Abha Sunlight Private Limited
Name of holding company				ReNew Solar Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
Nokor Solar Energy Private Limited
Disclosure of subsidiaries [line items]
Name of companies				Nokor Solar Energy Private Limited
Name of holding company				ReNew Solar Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
Izra Solar Energy Private Limited
Disclosure of subsidiaries [line items]
Name of companies				Izra Solar Energy Private Limited
Name of holding company				ReNew Solar Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
Zorya Solar Energy Private Limited
Disclosure of subsidiaries [line items]
Name of companies				Zorya Solar Energy Private Limited
Name of holding company				ReNew Solar Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
Vivasvat Solar Energy Private Limited
Disclosure of subsidiaries [line items]
Name of companies				Vivasvat Solar Energy Private Limited
Name of holding company				ReNew Solar Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
Nokor Bhoomi Private Limited
Disclosure of subsidiaries [line items]
Name of companies				Nokor Bhoomi Private Limited
Name of holding company				ReNew Solar Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
Akhilagya Solar Energy Private Limited
Disclosure of subsidiaries [line items]
Name of companies				Akhilagya Solar Energy Private Limited
Name of holding company				ReNew Solar Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
Adyah Solar Energy Private Limited
Disclosure of subsidiaries [line items]
Name of companies				Adyah Solar Energy Private Limited
Name of holding company				ReNew Solar Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary					100.00%
ReNew Transmission Ventures Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Transmission Ventures Private Limited
Name of holding company				ReNew Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
Helios Infratech Private Limited
Disclosure of subsidiaries [line items]
Name of companies				Helios Infratech Private Limited
Name of holding company				ReNew Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
Shruti Power Projects Private Limited
Disclosure of subsidiaries [line items]
Name of companies				Shruti Power Projects Private Limited
Name of holding company				ReNew Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
Lexicon Vanijya Private Limited
Disclosure of subsidiaries [line items]
Name of companies				Lexicon Vanijya Private Limited
Name of holding company				ReNew Solar Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
Symphony Vyapaar Private Limited
Disclosure of subsidiaries [line items]
Name of companies				Symphony Vyapaar Private Limited
Name of holding company				ReNew Solar Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
Star Solar Power Private Limited
Disclosure of subsidiaries [line items]
Name of companies				Star Solar Power Private Limited
Name of holding company				ReNew Solar Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
Sungold Energy Private Limited
Disclosure of subsidiaries [line items]
Name of companies				Sungold Energy Private Limited
Name of holding company				ReNew Solar Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
ReNew Energy Services Private Limited (formerly known as Sunsource Energy Services Private Limited)
Disclosure of subsidiaries [line items]
Name of companies				ReNew Energy Services Private Limited (formerly known as Sunsource Energy Services Private Limited)
Name of holding company				ReNew Solar Energy Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
Molagavalli Renewable Private Limited
Disclosure of subsidiaries [line items]
Name of companies				Molagavalli Renewable Private Limited
Name of holding company				ReNew Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
ReNew Vayu Urja Private Limited (Formerly known as KCT Renewable Energy Private Limited)
Disclosure of subsidiaries [line items]
Name of companies				ReNew Vayu Urja Private Limited (Formerly known as KCT Renewable Energy Private Limited)
Name of holding company				ReNew Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
Rajat Renewables Limited
Disclosure of subsidiaries [line items]
Name of companies				Rajat Renewables Limited
Name of holding company				ReNew Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
Kanak Renewables Limited
Disclosure of subsidiaries [line items]
Name of companies				Kanak Renewables Limited
Name of holding company				ReNew Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
Bidwal Renewable Private Limited
Disclosure of subsidiaries [line items]
Name of companies				Bidwal Renewable Private Limited
Name of holding company				ReNew Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
Pugalur Renewable Private Limited
Disclosure of subsidiaries [line items]
Name of companies				Pugalur Renewable Private Limited
Name of holding company				ReNew Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
AVP Powerinfra Private Limited
Disclosure of subsidiaries [line items]
Name of companies				AVP Powerinfra Private Limited
Name of holding company				Ostro Energy Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
Badoni Power Private Limited
Disclosure of subsidiaries [line items]
Name of companies				Badoni Power Private Limited
Name of holding company				Ostro Energy Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
Ostro Alpha Wind Private Limited
Disclosure of subsidiaries [line items]
Name of companies				Ostro Alpha Wind Private Limited
Name of holding company				Ostro Energy Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
Ostro Anantapur Private Limited
Disclosure of subsidiaries [line items]
Name of companies				Ostro Anantapur Private Limited
Name of holding company				Ostro Energy Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
Ostro Andhra Wind Private Limited
Disclosure of subsidiaries [line items]
Name of companies				Ostro Andhra Wind Private Limited
Name of holding company				Ostro Energy Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
Ostro AP Wind Private Limited
Disclosure of subsidiaries [line items]
Name of companies				Ostro AP Wind Private Limited
Name of holding company				Ostro Energy Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
Ostro Bhesada Wind Private Limited
Disclosure of subsidiaries [line items]
Name of companies				Ostro Bhesada Wind Private Limited
Name of holding company				Ostro Energy Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
Ostro Dakshin Power Private Limited
Disclosure of subsidiaries [line items]
Name of companies				Ostro Dakshin Power Private Limited
Name of holding company				Ostro Energy Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
Ostro Dhar Wind Private Limited
Disclosure of subsidiaries [line items]
Name of companies				Ostro Dhar Wind Private Limited
Name of holding company				Ostro Energy Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
Ostro Jaisalmer Private Limited
Disclosure of subsidiaries [line items]
Name of companies				Ostro Jaisalmer Private Limited
Name of holding company				Ostro Energy Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
Ostro Kannada Power Private Limited
Disclosure of subsidiaries [line items]
Name of companies				Ostro Kannada Power Private Limited
Name of holding company				Ostro Energy Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
Ostro Kutch Wind Private Limited
Disclosure of subsidiaries [line items]
Name of companies				Ostro Kutch Wind Private Limited
Name of holding company				Ostro Energy Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
Ostro Madhya Wind Private Limited
Disclosure of subsidiaries [line items]
Name of companies				Ostro Madhya Wind Private Limited
Name of holding company				Ostro Energy Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
Ostro Mahawind Power Private Limited
Disclosure of subsidiaries [line items]
Name of companies				Ostro Mahawind Power Private Limited
Name of holding company				Ostro Energy Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
Ostro Raj Wind Private Limited
Disclosure of subsidiaries [line items]
Name of companies				Ostro Raj Wind Private Limited
Name of holding company				Ostro Energy Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
Ostro Rann Wind Private Limited
Disclosure of subsidiaries [line items]
Name of companies				Ostro Rann Wind Private Limited
Name of holding company				Ostro Energy Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
Ostro Renewables Private Limited
Disclosure of subsidiaries [line items]
Name of companies				Ostro Renewables Private Limited
Name of holding company				Ostro Energy Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
Ostro Urja Wind Private Limited
Disclosure of subsidiaries [line items]
Name of companies				Ostro Urja Wind Private Limited
Name of holding company				Ostro Energy Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
Prathmesh Solarfarms Limited (refer note 54)
Disclosure of subsidiaries [line items]
Name of companies				Prathmesh Solarfarms Limited (refer note 54)
Name of holding company				Ostro Energy Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
Ostro Energy Private Limited
Disclosure of subsidiaries [line items]
Name of companies				Ostro Energy Private Limited
Name of holding company				ReNew Power Services Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
Zemira Renewable Energy Limited
Disclosure of subsidiaries [line items]
Name of companies				Zemira Renewable Energy Limited
Name of holding company				ReNew Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
ReNew Americas Inc.
Disclosure of subsidiaries [line items]
Name of companies				ReNew Americas Inc.
Name of holding company				ReNew Power Private Limited
Country of incorporation				United States of America
Proportion of ownership interest in subsidiary					100.00%
Auxo Solar Energy Private Limited
Disclosure of subsidiaries [line items]
Name of companies				Auxo Solar Energy Private Limited
Name of holding company				Renew Wind Energy (TN) Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
ReNew Power International Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Power International Limited
Name of holding company				ReNew Power Private Limited
Country of incorporation				United Kingdom
Proportion of ownership interest in subsidiary				100.00%	100.00%
Zorya Distributed Power Services Private Limited
Disclosure of subsidiaries [line items]
Name of companies				Zorya Distributed Power Services Private Limited
Name of holding company				ReNew Solar Energy Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
ReNew Cleantech Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Cleantech Private Limited
Name of holding company				ReNew Solar Energy Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
ReNew Sun Ability Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Sun Ability Private Limited
Name of holding company				ReNew Solar Energy Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
ReNew Mega Light Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Mega Light Private Limited
Name of holding company				ReNew Solar Energy Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
ReNew Sun Waves Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Sun Waves Private Limited
Name of holding company				ReNew Solar Energy (Jharkhand Four) Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
ReNew Sun Flash Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Sun Flash Private Limited
Name of holding company				ReNew Solar Energy Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
ReNew Sun Bright Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Sun Bright Private Limited
Name of holding company				ReNew Solar Energy (Jharkhand Four) Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
ReNew Sun Energy Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Sun Energy Private Limited
Name of holding company				ReNew Solar Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
Auxo Sunlight Private Limited
Disclosure of subsidiaries [line items]
Name of companies				Auxo Sunlight Private Limited
Name of holding company				ReNew Solar Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
ReNew Services Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Services Private Limited
Name of holding company				ReNew Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
ReNew Sun Power Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Sun Power Private Limited
Name of holding company				ReNew Solar Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
ReNew Mega Urja Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Mega Urja Private Limited
Name of holding company				ReNew Solar Energy Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
ReNew Mega Spark Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Mega Spark Private Limited
Name of holding company				ReNew Solar Energy Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
ReNew Mega Green Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Mega Green Private Limited
Name of holding company				ReNew Solar Energy Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
ReNew Green Energy Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Green Energy Private Limited
Name of holding company				ReNew Solar Energy Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
ReNew Green Power Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Green Power Private Limited
Name of holding company				ReNew Solar Energy Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
Greenyana Sunstream Private Limited
Disclosure of subsidiaries [line items]
Name of companies				Greenyana Sunstream Private Limited
Name of holding company				ReNew Solar Energy Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
Renew Vyoman Power Private Limited
Disclosure of subsidiaries [line items]
Name of companies				Renew Vyoman Power Private Limited
Name of holding company				ReNew Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
Renew Vyoman Energy Private Limited
Disclosure of subsidiaries [line items]
Name of companies				Renew Vyoman Energy Private Limited
Name of holding company				ReNew Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
Renew Vyan Shakti Private Limited
Disclosure of subsidiaries [line items]
Name of companies				Renew Vyan Shakti Private Limited
Name of holding company				ReNew Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
Shekhawati Solar Park Private Limited
Disclosure of subsidiaries [line items]
Name of companies				Shekhawati Solar Park Private Limited
Name of holding company				ReNew Solar Energy Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
Renew Green Solutions Private Limited
Disclosure of subsidiaries [line items]
Name of companies				Renew Green Solutions Private Limited
Name of holding company				ReNew Solar Energy Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
Renew Surya Roshni Private Limited
Disclosure of subsidiaries [line items]
Name of companies				Renew Surya Roshni Private Limited
Name of holding company				ReNew Solar Energy Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
Renew Solar Urja Private Limited
Disclosure of subsidiaries [line items]
Name of companies				Renew Solar Urja Private Limited
Name of holding company				ReNew Solar Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
Renew Surya Ojas Private Limited
Disclosure of subsidiaries [line items]
Name of companies				Renew Surya Ojas Private Limited
Name of holding company				ReNew Solar Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
Renew Surya Vihaan Private Limited
Disclosure of subsidiaries [line items]
Name of companies				Renew Surya Vihaan Private Limited
Name of holding company				ReNew Solar Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%	100.00%
ReNew Surya Jyoti Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Surya Jyoti Private Limited
Name of holding company				ReNew Solar Energy Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%
ReNew Surya Aayan Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Surya Aayan Private Limited
Name of holding company				ReNew Solar Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%
ReNew Solar Vidhi Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Solar Vidhi Private Limited
Name of holding company				ReNew Solar Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%
ReNew Surya Pratap Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Surya Pratap Private Limited
Name of holding company				ReNew Solar Energy Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%
ReNew Surya Alok Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Surya Alok Private Limited
Name of holding company				ReNew Green Energy Solutions Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				69.00%
Renew Surya Kiran Private Limited
Disclosure of subsidiaries [line items]
Name of companies				Renew Surya Kiran Private Limited
Name of holding company				ReNew Green Energy Solutions Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%
ReNew Surya Tejas Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Surya Tejas Private Limited
Name of holding company				ReNew Green Energy Solutions Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%
ReNew Surya Uday Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Surya Uday Private Limited
Name of holding company				ReNew Green Energy Solutions Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%
ReNew Solar Piyush Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Solar Piyush Private Limited
Name of holding company				ReNew Solar Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%
ReNew Solar Stellar Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Solar Stellar Private Limited
Name of holding company				ReNew Solar Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%
Regent Climate Connect Knowledge Solutions Private Limited
Disclosure of subsidiaries [line items]
Name of companies				Regent Climate Connect Knowledge Solutions Private Limited
Name of holding company				ReNew Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%
ReNew Vayu Energy Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Vayu Energy Private Limited
Name of holding company				ReNew Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%
ReNew Vayu Power Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Vayu Power Private Limited
Name of holding company				ReNew Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%
ReNew Photovolitics Private Limited (Formerly Known As ReNew Saksham Urja Private Limited)
Disclosure of subsidiaries [line items]
Name of companies				ReNew Photovolitics Private Limited (Formerly Known As ReNew Saksham Urja Private Limited)
Name of holding company				ReNew Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%
ReNew Pawan Shakti Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Pawan Shakti Private Limited
Name of holding company				ReNew Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%
ReNew Pawan Urja Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Pawan Urja Private Limited
Name of holding company				ReNew Power Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%
ReNew Sunlight Energy Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Sunlight Energy Private Limited
Name of holding company				ReNew Green Energy Solutions Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%
ReNew Sun Renewables Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Sun Renewables Private Limited
Name of holding company				ReNew Green Energy Solutions Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%
ReNew Sun Shakti Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Sun Shakti Private Limited
Name of holding company				ReNew Green Energy Solutions Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%
ReNew Ravi Tejas Private Limited
Disclosure of subsidiaries [line items]
Name of companies				ReNew Ravi Tejas Private Limited
Name of holding company				ReNew Green Energy Solutions Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				100.00%
Aalok Solarfarms Limited
Disclosure of subsidiaries [line items]
Name of companies				Aalok Solarfarms Limited
Name of holding company				Ostro Energy Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				75.00%
Abha Solarfarms Limited
Disclosure of subsidiaries [line items]
Name of companies				Abha Solarfarms Limited
Name of holding company				Ostro Energy Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				75.00%
Heramba Renewables Limited
Disclosure of subsidiaries [line items]
Name of companies				Heramba Renewables Limited
Name of holding company				Ostro Energy Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				75.00%
Shreyas Solarfarms Limited
Disclosure of subsidiaries [line items]
Name of companies				Shreyas Solarfarms Limited
Name of holding company				Ostro Energy Private Limited
Country of incorporation				India
Proportion of ownership interest in subsidiary				75.00%

Group information - Summary of Joint Ventures (Detail)	12 Months Ended
Group information - Summary of Joint Ventures (Detail)	Mar. 31, 2021	Mar. 31, 2020
Aalok Solarfarms Limited
Disclosure of joint ventures [line items]
Name of companies	Aalok Solarfarms Limited
Investor entity	Ostro Energy Private Limited
Country of incorporation	India
Proportion of ownership interest in joint venture		75.00%
Abha Solarfarms Limited
Disclosure of joint ventures [line items]
Name of companies	Abha Solarfarms Limited
Investor entity	Ostro Energy Private Limited
Country of incorporation	India
Proportion of ownership interest in joint venture		75.00%
Heramba Renewables Limited
Disclosure of joint ventures [line items]
Name of companies	Heramba Renewables Limited
Investor entity	Ostro Energy Private Limited
Country of incorporation	India
Proportion of ownership interest in joint venture		75.00%
Shreyas Solarfarms Limited
Disclosure of joint ventures [line items]
Name of companies	Shreyas Solarfarms Limited
Investor entity	Ostro Energy Private Limited
Country of incorporation	India
Proportion of ownership interest in joint venture		75.00%

Group information - Summary of Joint Operations (Detail) - VG DTL Transmissions Projects Private Limited	12 Months Ended
	Mar. 31, 2021
Disclosure of joint operations [line items]
Name of companies	VG DTL Transmissions Projects Private Limited
Investor entity	ReNew Wind Energy (AP2) Private Limited
Country of incorporation	India
Proportion of ownership interest in joint operation	50.00%

Group information - Additional Information (Detail) - Entities		12 Months Ended
	Mar. 31, 2021	Mar. 31, 2021
Disclosure of subsidiaries [line items]
Number of joint ventures	4	4
Adyah Solar Energy Private Limited
Disclosure of subsidiaries [line items]
Date of disposal		Feb. 15, 2021
ReNew Americas Inc
Disclosure of subsidiaries [line items]
Dissolution term		ReNew Americas Inc. was dissolved in November 2020

Related party disclosure - Summary of Details of Transactions And Balances With Entities Having Significant Influence on The Company (Detail) - GS Wyvern Holdings Limited - Joint Control Or Significant Influence - INR (₨) ₨ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Disclosure of transactions between related parties [line items]
Compulsorily convertible preference shares issued		7,734
Interest expense on compulsorily convertible preference shares outstanding	₨ 1,165		₨ 0
Compulsorily convertible preference shares outstanding	8,899	7,734

Related party disclosure - Summary of Remuneration To Key Managerial Personnel (KMP) (Detail) - INR (₨) ₨ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Disclosure of transactions between related parties [line items]
Key management personnel compensation	₨ 318	₨ 413	₨ 456
Mr Sumant Sinha Chairman And Managing Director
Disclosure of transactions between related parties [line items]
Key management personnel compensation	191	215	302
Mr Ravi Seth Chief Financial Officer
Disclosure of transactions between related parties [line items]
Key management personnel compensation		21	42
Mr D Muthukumaran Chief Financial Officer
Disclosure of transactions between related parties [line items]
Key management personnel compensation	100	88
Mr Ashish Jain Company Secretary And Compliance Officer
Disclosure of transactions between related parties [line items]
Key management personnel compensation	7	7	6
Mr Parag Sharma Chief Operating Officer And Head Of Solar Business
Disclosure of transactions between related parties [line items]
Key management personnel compensation		17	37
Mr Balram Mehta President Of Wind Business
Disclosure of transactions between related parties [line items]
Key management personnel compensation		30	37
Mr Ravi Parmeshwar Chief Human Resource Officer
Disclosure of transactions between related parties [line items]
Key management personnel compensation		17	19
Mrs Vaishali Nigam Sinha CSR And Communication Officer
Disclosure of transactions between related parties [line items]
Key management personnel compensation	₨ 20	₨ 18	₨ 13

Related party disclosure - Summary of Detailed Information About Related Parties Explanatory (Detail)	12 Months Ended
	Mar. 31, 2021
Heramba Renewables Limited
Disclosure Of Detailed Information About Related Parties [Line Items]
Name Of Joint Venture	Heramba Renewables Limited
Aalok Solarfarms Limited
Disclosure Of Detailed Information About Related Parties [Line Items]
Name Of Joint Venture	Aalok Solarfarms Limited
Shreyas Solarfarms Limited
Disclosure Of Detailed Information About Related Parties [Line Items]
Name Of Joint Venture	Shreyas Solarfarms Limited
Abha Solarfarms Limited
Disclosure Of Detailed Information About Related Parties [Line Items]
Name Of Joint Venture	Abha Solarfarms Limited
Joint Control Or Significant Influence \| GS Wyvern Holdings Limited
Disclosure Of Detailed Information About Related Parties [Line Items]
Name of entity with significant influence on the company	GS Wyvern Holdings Limited
Key Managerial Personnel (KMP) \| Mr Sumant Sinha Chairman And Managing Director
Disclosure Of Detailed Information About Related Parties [Line Items]
Name of Key Management Personnel Or Relatives Of Key Management Personnel	Mr. Sumant Sinha, Chairman and Managing Director
Key Managerial Personnel (KMP) \| Mr Ravi Seth Chief Financial Officer
Disclosure Of Detailed Information About Related Parties [Line Items]
Name of Key Management Personnel Or Relatives Of Key Management Personnel	Mr. Ravi Seth, Chief Financial Officer (till 2 September 2019)
Key Managerial Personnel (KMP) \| Mr D Muthukumaran Chief Financial Officer
Disclosure Of Detailed Information About Related Parties [Line Items]
Name of Key Management Personnel Or Relatives Of Key Management Personnel	Mr. D Muthukumaran, Chief Financial Officer (from 3 September 2019)
Key Managerial Personnel (KMP) \| Mr Ashish Jain Company Secretary And Compliance Officer
Disclosure Of Detailed Information About Related Parties [Line Items]
Name of Key Management Personnel Or Relatives Of Key Management Personnel	Mr. Ashish Jain, Company Secretary and Compliance Officer
Key Managerial Personnel (KMP) \| Mr Parag Sharma Chief Operating Officer And Head Of Solar Business
Disclosure Of Detailed Information About Related Parties [Line Items]
Name of Key Management Personnel Or Relatives Of Key Management Personnel	Mr. Parag Sharma, Chief Operating Officer and head of solar business (from 26 April 2018 till 1 November 2019)
Key Managerial Personnel (KMP) \| Mr Balram Mehta President Of Wind Business
Disclosure Of Detailed Information About Related Parties [Line Items]
Name of Key Management Personnel Or Relatives Of Key Management Personnel	Mr. Balram Mehta, President of wind business (till 8 November 2019)
Key Managerial Personnel (KMP) \| Mr Ravi Parmeshwar Chief Human Resource Officer
Disclosure Of Detailed Information About Related Parties [Line Items]
Name of Key Management Personnel Or Relatives Of Key Management Personnel	Mr. Ravi Parmeshwar, Chief Human Resource Officer (till 8 November 2019)
Key Managerial Personnel (KMP) \| Mrs Vaishali Nigam Sinha CSR And Communication Officer
Disclosure Of Detailed Information About Related Parties [Line Items]
Name of Key Management Personnel Or Relatives Of Key Management Personnel	Mrs. Vaishali Nigam Sinha, CSR and Communication Officer
Entities Owned Or Significantly Influenced By Key Management Personnel \| Wisemore Advisory Private Limited
Disclosure Of Detailed Information About Related Parties [Line Items]
Name Of Entities Owned Or Significantly Influenced By Key Management Personnel Or Their Relatives	Wisemore Advisory Private Limited
Entities Owned Or Significantly Influenced By Key Management Personnel \| ReNew Foundation
Disclosure Of Detailed Information About Related Parties [Line Items]
Name Of Entities Owned Or Significantly Influenced By Key Management Personnel Or Their Relatives	ReNew Foundation
Joint Control \| Prathamesh Solarfarms Limited
Disclosure Of Detailed Information About Related Parties [Line Items]
Name Of Joint Venture	Prathamesh Solarfarms Limited (till 30 January 2019)
Joint Control \| Heramba Renewables Limited
Disclosure Of Detailed Information About Related Parties [Line Items]
Name Of Joint Venture	Heramba Renewables Limited (till 31 December 2020)
Joint Control \| Aalok Solarfarms Limited
Disclosure Of Detailed Information About Related Parties [Line Items]
Name Of Joint Venture	Aalok Solarfarms Limited (till 31 December 2020)
Joint Control \| Shreyas Solarfarms Limited
Disclosure Of Detailed Information About Related Parties [Line Items]
Name Of Joint Venture	Shreyas Solarfarms Limited (till 31 December 2020)
Joint Control \| Abha Solarfarms Limited
Disclosure Of Detailed Information About Related Parties [Line Items]
Name Of Joint Venture	Abha Solarfarms Limited (till 31 December 2020)
Joint Control \| VG DTL Transmissions Private Limited
Disclosure Of Detailed Information About Related Parties [Line Items]
Name Of Joint Venture	VG DTL Transmissions Private Limited

Related party disclosure - Summary of Transactions And Balances With Entities Under Joint Control (Detail) - INR (₨) ₨ in Millions	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Statement [Line Items]
Corporate guarantee outstanding to project lender(s)	₨ 0
Heramba Renewables Limited \| Joint Control
Statement [Line Items]
Unsecured loan received	221		₨ 84
Unsecured loan repaid	4	₨ 11	15
Interest expense on unsecured loan received	6	5	1
Expenses incurred on behalf of the related party	23	0
Income from management shared services	5	5	5
Income from operation and maintenance services	8	5
Interest income on compulsorily convertible debentures	17	21
Trade receivable	0	11
Recoverable from related party	0	3
Unsecured loan payable		58
Interest expense accrued on unsecured loan payable	0	5
Unbilled operation and maintenance revenue	0	6
Interest accrued on compulsorily convertible debentures	0	19
Corporate guarantee outstanding to project lender(s)	0	148
Recoverable from related party	0	0
Shreyas Solarfarms Limited \| Joint Control
Statement [Line Items]
Unsecured loan received	222		84
Unsecured loan repaid	11	12	13
Interest expense on unsecured loan received	6	5	1
Expenses incurred on behalf of the related party	23	0
Expenses incurred on behalf by the related party	0		0
Interest income on unsecured loan given	0	0
Income from management shared services	4	5	5
Income from operation and maintenance services	8	5
Interest income on compulsorily convertible debentures	17	23
Unsecured loan given			5
Unsecured loan received back	5
Trade receivable	0	12
Unsecured loan payable	0	59
Interest expense accrued on unsecured loan payable	0	5
Unbilled operation and maintenance revenue	0	6
Interest accrued on compulsorily convertible debentures	0	21
Corporate guarantee outstanding to project lender(s)	0	148
Recoverable from related party	0	3
Trade payable	0	0
Unsecured loan receivable	0	5
Interest income accrued on unsecured loan receivable		0
Prathamesh Solarfarms Limited \| Joint Control
Statement [Line Items]
Unsecured loan received	0	0	729
Unsecured loan repaid	0	0	156
Interest expense on unsecured loan received	0	0	10
Expenses incurred on behalf of the related party	0	0	3
Expenses incurred on behalf by the related party	0	0	0
Income from management shared services	0	0	13
Bank guarantee released from project lender(s)	0	0	193
Aalok Solarfarms Limited \| Joint Control
Statement [Line Items]
Unsecured loan received	114		42
Unsecured loan repaid		7	5
Interest expense on unsecured loan received	3	2	0
Expenses incurred on behalf of the related party	11		0
Expenses incurred on behalf by the related party	0
Interest income on unsecured loan given			0
Income from management shared services	2	3	2
Income from operation and maintenance services	4	3
Interest income on compulsorily convertible debentures	8	12
Trade receivable	0	6
Recoverable from related party	0	0
Unsecured loan payable		30
Interest expense accrued on unsecured loan payable	0	3
Unbilled operation and maintenance revenue	0	3
Interest accrued on compulsorily convertible debentures	0	11
Corporate guarantee outstanding to project lender(s)	0	74
Recoverable from related party	0	3
Abha Solarfarms Limited \| Joint Control
Statement [Line Items]
Unsecured loan received	105	43
Interest expense on unsecured loan received	4	3
Expenses incurred on behalf of the related party	12	0	3
Expenses incurred on behalf by the related party			0
Income from management shared services	2	3	₨ 2
Income from operation and maintenance services	4	3
Interest income on compulsorily convertible debentures	8	11
Trade receivable	0	6
Unsecured loan payable	0	43
Interest expense accrued on unsecured loan payable	0	3
Unbilled operation and maintenance revenue	0	3
Interest accrued on compulsorily convertible debentures	0	10
Corporate guarantee outstanding to project lender(s)	0	74
Recoverable from related party	0	6
Trade payable	0	0
Unsecured loan receivable	₨ 0	₨ 0

Related party disclosure - Summary of Transactions And Balances With Other Related Parties (Detail) - INR (₨) ₨ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Entities Owned Or Significantly Influenced By Key Management Personnel \| ReNew Foundation
Disclosure of transactions between related parties [line items]
Contribution for CSR activities	₨ 0	₨ 3
Key Managerial Personnel (KMP) \| Mr D Muthukumaran Chief Financial Officer
Disclosure of transactions between related parties [line items]
Salary advance	11	0
Salary advance	₨ 11	₨ 0

Related party disclosure - Additional Information (Detail) ₨ in Millions				12 Months Ended
	Mar. 31, 2021 INR (₨) Entities	Mar. 31, 2020 INR (₨)	Mar. 31, 2019 INR (₨)	Mar. 31, 2021 INR (₨) Entities
Statement [Line Items]
Number of joint ventures \| Entities	4			4
Financial guarantee, related party transactions	₨ 0			₨ 0
Loss allowance on financial guarantee, related party transactions				0
Key Managerial Personnel (KMP)
Statement [Line Items]
Key management personnel compensation, short term employment benefits	153	₨ 219	₨ 198
Key management personnel compensation, share based payment	152	179	241
Key management personnel compensation, gratuity and leave encashment expense	13	₨ 15	₨ 17
Wisemore Advisory Private Limited
Statement [Line Items]
Financial guarantee, related party transactions	4,900			₨ 4,900
Term of guarantee				7 months
Financial guarantee at fair value, related party transactions	₨ 121			₨ 121
Amortization of financial guarantee, related party transactions				43
Provision of guarantees, related party transactions				₨ 78

Segment information - Additional Information (Detail) - INR (₨) ₨ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Disclosure of operating segments [line items]
Total income	₨ 54,491	₨ 53,303	₨ 47,902
Percentage of entity revenue	10.00%
Four Major Customers [Member]
Disclosure of operating segments [line items]
Total income	₨ 23,175	23,312	19,970
Four Major Customers [Member] \| Wind Power [Member]
Disclosure of operating segments [line items]
Total income	14,676	15,982	13,770
Four Major Customers [Member] \| Solar Power [Member]
Disclosure of operating segments [line items]
Total income	₨ 8,499	₨ 7,330	₨ 6,200

+ References

+ Details

Segment information - Summary Of Operating Segments (Detail) - INR (₨) ₨ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Disclosure of operating segments [line items]
Total income	₨ 54,491	₨ 53,303	₨ 47,902
Revenue from contracts with customers	48,187	48,412	43,144
Other income	2,870	2,634	3,111
Less: Employee benefit and other expenses	1,259	951	1,008
EBITDA	(5,083)	(570)	4,975
Depreciation and amortisation expense	12,026	11,240	9,496
Finance costs	38,281	35,487	27,538
(Loss) / profit before share of profit of jointly controlled entities and tax	(5,128)	(623)	4,935
Income tax expense	(2,904)	(2,158)	(1,801)
(Loss) / profit for the year	(8,032)	(2,781)	3,134
Operating segments [member]
Disclosure of operating segments [line items]
Revenue from contracts with customers	48,187	48,412	43,144
(Loss) / profit before share of profit of jointly controlled entities and tax	(5,083)	(570)	4,975
Share in loss of jointly controlled entities	(45)	(53)	(40)
Income tax expense	(2,904)	(2,158)	(1,801)
(Loss) / profit for the year	(8,032)	(2,781)	3,134
Unallocated amounts [member]
Disclosure of operating segments [line items]
Revenue from contracts with customers	39	14	27
Wind Power [Member] \| Operating segments [member]
Disclosure of operating segments [line items]
Revenue from contracts with customers	29,411	31,800	29,480
Solar Power [Member] \| Operating segments [member]
Disclosure of operating segments [line items]
Revenue from contracts with customers	18,737	16,598	13,637
Revenue From Contracts With Customers [Member] \| Operating segments [member]
Disclosure of operating segments [line items]
Total income	54,491	53,303	47,902
Revenue from contracts with customers	48,187	48,412	43,144
Other income	6,304	4,891	4,758
Less: Employee benefit and other expenses	9,267	7,146	5,893
Total expenses	9,267	7,146	5,893
EBITDA	45,224	46,157	42,009
Depreciation and amortisation expense	12,026	11,240	9,496
Finance costs	38,281	35,487	27,538
Revenue From Contracts With Customers [Member] \| Unallocated amounts [member]
Disclosure of operating segments [line items]
Total income	1,115	1,245	448
Revenue from contracts with customers	39	14	27
Other income	1,076	1,231	421
Less: Employee benefit and other expenses	1,698	1,342	1,727
Total expenses	1,698	1,342	1,727
EBITDA	(583)	(97)	(1,279)
Revenue From Contracts With Customers [Member] \| Wind Power [Member] \| Operating segments [member]
Disclosure of operating segments [line items]
Total income	33,609	34,866	33,181
Revenue from contracts with customers	29,411	31,800	29,480
Other income	4,198	3,066	3,701
Less: Employee benefit and other expenses	4,843	3,706	3,086
Total expenses	4,843	3,706	3,086
EBITDA	28,766	31,160	30,095
Revenue From Contracts With Customers [Member] \| Solar Power [Member] \| Operating segments [member]
Disclosure of operating segments [line items]
Total income	19,767	17,192	14,273
Revenue from contracts with customers	18,737	16,598	13,637
Other income	1,030	594	636
Less: Employee benefit and other expenses	2,726	2,098	1,080
Total expenses	2,726	2,098	1,080
EBITDA	₨ 17,041	₨ 15,094	₨ 13,193

Fair values - Summary of Carrying Amounts And Fair Value of The Financial Instruments (Detail) - INR (₨) ₨ in Millions	Mar. 31, 2021	Mar. 31, 2020
Financial guarantee contracts
Financial liabilities
Carrying value	₨ 78	₨ 0
Fair value	78	0
Non convertible debentures \| Financial liabilities at amortised cost, category [member]
Financial liabilities
Carrying value	100,584	45,211
Fair value	101,725	45,211
Term loan from bank \| Financial liabilities at amortised cost, category [member]
Financial liabilities
Carrying value	51,157	53,924
Fair value	51,455	53,924
Term Loan From Financial Institutions \| Financial liabilities at amortised cost, category [member]
Financial liabilities
Carrying value	93,419	92,488
Fair value	99,394	92,488
Compulsorily Convertible Debentures \| Financial liabilities at amortised cost, category [member]
Financial liabilities
Carrying value	809	553
Fair value	809	553
Senior Secured Notes \| Financial liabilities at amortised cost, category [member]
Financial liabilities
Carrying value	92,924	128,160
Fair value	98,308	128,160
Compulsorily Convertible Preference Shares \| Financial liabilities at amortised cost, category [member]
Financial liabilities
Carrying value	26,697	23,200
Fair value	26,697	23,200
Interest accrued but not due on borrowings \| Financial liabilities at amortised cost, category [member]
Financial liabilities
Carrying value	1,686	1,692
Fair value	1,686	1,692
Interest accrued but not due on debentures \| Financial liabilities at amortised cost, category [member]
Financial liabilities
Carrying value	1,344	371
Fair value	1,344	371
Capital creditors \| Financial liabilities at amortised cost, category [member]
Financial liabilities
Carrying value	9,001	8,926
Fair value	9,001	8,926
Purchase consideration payable \| Financial liabilities at amortised cost, category [member]
Financial liabilities
Carrying value	191	272
Fair value	191	272
Other payables \| Financial liabilities at amortised cost, category [member]
Financial liabilities
Carrying value	1	109
Fair value	1	109
Interest-bearing loans and borrowings - Short term \| Financial liabilities at amortised cost, category [member]
Financial liabilities
Carrying value	10,643	12,148
Fair value	10,643	12,148
Trade payables \| Financial liabilities at amortised cost, category [member]
Financial liabilities
Carrying value	3,245	3,733
Fair value	3,245	3,733
Lease liabilities \| Financial liabilities at amortised cost, category [member]
Financial liabilities
Carrying value	2,112	1,646
Fair value	2,112	1,646
Derivative instruments \| Financial Liabilities At Fair Value Through Other Comprehensive Income Category [Member]
Financial liabilities
Carrying value	1,070	0
Fair value	1,070	0
Security Deposits \| Financial assets measured at amortised cost
Financial assets
Carrying value	185	131
Fair value	185	131
Bank deposits with remaining maturity for more than twelve months \| Financial assets measured at amortised cost
Financial assets
Carrying value	2,999	142
Fair value	2,999	142
Trade receivables \| Financial assets measured at amortised cost
Financial assets
Carrying value	35,980	25,914
Fair value	35,980	25,914
Cash and cash equivalents \| Financial assets measured at amortised cost
Financial assets
Carrying value	20,679	13,089
Fair value	20,679	13,089
Bank balances other than cash and cash equivalents \| Financial assets measured at amortised cost
Financial assets
Carrying value	26,506	31,203
Fair value	26,506	31,203
Advances Recoverable \| Financial assets measured at amortised cost
Financial assets
Carrying value	154	233
Fair value	154	233
Deferred Consideration Receivable \| Financial assets measured at amortised cost
Financial assets
Carrying value	1,936	0
Fair value	1,936	0
Interest Accrued On Fixed Deposits \| Financial assets measured at amortised cost
Financial assets
Carrying value	394	607
Fair value	394	607
Government grant receivable \| Financial assets measured at amortised cost
Financial assets
Carrying value	1,161	1,749
Fair value	1,161	1,749
Loans To Related Parties \| Financial assets measured at amortised cost
Financial assets
Carrying value	11	5
Fair value	11	5
Interest accrued on loans to related parties \| Financial assets measured at amortised cost
Financial assets
Carrying value	0	0
Fair value	0	0
Recoverable From Related Parties \| Financial assets measured at amortised cost
Financial assets
Carrying value	0	15
Fair value	0	15
Other current financial assets \| Financial assets measured at amortised cost
Financial assets
Carrying value	52	114
Fair value	52	114
Investments, unquoted debt securities \| Measured at FVTPL
Financial assets
Carrying value	0	624
Fair value	0	624
Derivative instruments \| Measured at FVTOCI
Financial assets
Carrying value	2,691	8,718
Fair value	₨ 2,691	₨ 8,718

Fair Value Hierarchy - Additional Information (Detail)	12 Months Ended
Fair Value Hierarchy - Additional Information (Detail)	Mar. 31, 2021 INR (₨)
Text Block [Abstract]
Transfer between level one and level two under fair value hierarchy	₨ 0
Transfer into or out of level three under fair value hierarchy	₨ 0

Fair Value Hierarchy - Summary of Fair Value Measurement Hierarchy Of The Assets And Liabilities (Detail) - INR (₨) ₨ in Millions	Mar. 31, 2021	Mar. 31, 2020
Financial guarantee contracts
Financial Liabilities [Abstract]
Carrying value	₨ 78	₨ 0
Fair value	78	0
Non convertible debentures \| Level 3
Financial Liabilities [Abstract]
Carrying value	100,584	45,211
Fair value	101,725	45,211
Compulsorily Convertible Debentures \| Level 3
Financial Liabilities [Abstract]
Carrying value	809	553
Fair value	809	553
Term loan from bank \| Level 3
Financial Liabilities [Abstract]
Carrying value	51,157	53,924
Fair value	51,455	53,924
Term Loan From Financial Institutions \| Level 3
Financial Liabilities [Abstract]
Carrying value	93,419	92,488
Fair value	99,394	92,488
Compulsorily Convertible Preference Shares \| Level 3
Financial Liabilities [Abstract]
Carrying value	0	23,200
Fair value	0	23,200
Senior Secured Notes \| Level 3
Financial Liabilities [Abstract]
Carrying value	92,924	128,160
Fair value	92,924	128,160
Interest accrued but not due on debentures \| Level 3
Financial Liabilities [Abstract]
Carrying value	132	0
Fair value	132	0
Derivative instruments \| Level 2
Financial Liabilities [Abstract]
Carrying value	1,070	0
Fair value	1,070	0
Bank deposits with remaining maturity for more than twelve months \| Level 2
Financial Assets [Abstract]
Carrying value	2,999	142
Fair value	2,999	142
Investments, unquoted debt securities \| Level 3
Financial Assets [Abstract]
Carrying value	0	624
Fair value	0	624
Derivative instruments \| Level 2
Financial Assets [Abstract]
Carrying value	2,691	8,718
Fair value	2,691	8,718
Security Deposits \| Level 3
Financial Assets [Abstract]
Carrying value	140	126
Fair value	140	126
Trade receivables \| Level 2
Financial Assets [Abstract]
Carrying value	1,178	0
Fair value	₨ 1,178	₨ 0

Fair Value Hierarchy - Summary of Fair Value Hierarchy, Valuation Techniques And Inputs (Detail)	12 Months Ended
	Mar. 31, 2021
Discounted cash flow \| Prevailing interest rates in market, future cash flows \| Financial guarantee contracts \| Financial liabilities measured at FVTPL \| Level 3
Financial liabilities measured at amortised cost
Valuation technique	Discounted cash flow
Inputs used	Prevailing interest rates in market, future cash flows
Discounted cash flow \| Prevailing interest rates in market, future cash flows \| Non convertible debentures \| Financial liabilities measured at amortised cost \| Level 3
Financial liabilities measured at amortised cost
Valuation technique	Discounted cash flow
Inputs used	Prevailing interest rates in market, future cash flows
Discounted cash flow \| Prevailing interest rates in market, future cash flows \| Unsecured Compulsorily Convertible Debentures [Member] \| Financial liabilities measured at amortised cost \| Level 3
Financial liabilities measured at amortised cost
Valuation technique	Discounted cash flow
Inputs used	Prevailing interest rates in market, future cash flows
Discounted cash flow \| Prevailing interest rates in market, future cash flows \| Term loan from bank \| Financial liabilities measured at amortised cost \| Level 3
Financial liabilities measured at amortised cost
Valuation technique	Discounted cash flow
Inputs used	Prevailing interest rates in market, future cash flows
Discounted cash flow \| Prevailing interest rates in market, future cash flows \| Term Loan From Financial Institutions \| Financial liabilities measured at amortised cost \| Level 3
Financial liabilities measured at amortised cost
Valuation technique	Discounted cash flow
Inputs used	Prevailing interest rates in market, future cash flows
Discounted cash flow \| Prevailing interest rates in market, future cash flows \| Compulsorily Convertible Preference Shares \| Financial liabilities measured at amortised cost \| Level 3
Financial liabilities measured at amortised cost
Valuation technique	Discounted cash flow
Inputs used	Prevailing interest rates in market, future cash flows
Discounted cash flow \| Prevailing interest rates in market, future cash flows \| Senior Secured Notes \| Financial liabilities measured at amortised cost \| Level 3
Financial liabilities measured at amortised cost
Valuation technique	Discounted cash flow
Inputs used	Prevailing interest rates in market, future cash flows
Discounted cash flow \| Prevailing interest rates in market, future cash flows \| Interest accrued but not due on debentures \| Financial liabilities measured at amortised cost \| Level 3
Financial liabilities measured at amortised cost
Valuation technique	Discounted cash flow
Inputs used	Prevailing interest rates in market, future cash flows
Market value techniques \| Forward foreign currency exchange rates, interest rates to discount future cash flows \| Financial liabilities measured at FVTOCI \| Level 2
Financial assets measured at amortised cost
Valuation technique	Market value techniques
Inputs used	Forward foreign currency exchange rates, interest rates to discount future cash flows
Investments, unquoted debt securities \| Discounted cash flow \| Prevailing interest rates in market, future cash flows \| Financial assets measured at FVTPL \| Level 3
Financial assets measured at amortised cost
Valuation technique	Discounted cash flow
Inputs used	Prevailing interest rates in market, future cash flows
Derivative instruments \| Market value techniques \| Forward foreign currency exchange rates, interest rates to discount future cash flows \| Financial assets measured at FVTOCI \| Level 2
Financial assets measured at amortised cost
Valuation technique	Market value techniques
Inputs used	Forward foreign currency exchange rates, interest rates to discount future cash flows
Security Deposits \| Discounted cash flow \| Prevailing interest rates in market, future cash flows \| Financial assets measured at amortised cost \| Level 3
Financial assets measured at amortised cost
Valuation technique	Discounted cash flow
Inputs used	Prevailing interest rates in market, future cash flows
Trade receivables \| Discounted cash flow \| Prevailing interest rates in market, future cash flows \| Financial assets measured at amortised cost \| Level 2
Financial assets measured at amortised cost
Valuation technique	Discounted cash flow
Inputs used	Prevailing interest rates in market, future cash flows
Bank deposits with remaining maturity for more than twelve months \| Market value techniques \| Prevailing interest rates in market, future cash flows \| Financial assets measured at amortised cost \| Level 2
Financial assets measured at amortised cost
Valuation technique	Market value techniques
Inputs used	Prevailing interest rates in market, future cash flows

Financial risk management objectives and policies - Additional Information (Detail) - INR (₨) ₨ in Millions	Mar. 31, 2021	Mar. 31, 2020
Financial Risk Management Objectives And Policies [Abstract]
Undrawn loan facilities	₨ 22,111	₨ 52,148

Financial risk management objectives and policies - Summary of Change in Interest Rates on Financial Liabilities (Detail) ₨ in Millions, $ in Millions	12 Months Ended
	Mar. 31, 2021 INR (₨) Basic_points	Mar. 31, 2021 USD ($) Basic_points	Mar. 31, 2020 INR (₨) Basic_points	Mar. 31, 2020 USD ($) Basic_points	Mar. 31, 2019 INR (₨)	Mar. 31, 2019 USD ($)
INR
Disclosure Of Change In Interest Rates On Financial Liabilities Explanatory [Line Items]
Increase / decrease in basis points	50	50	50	50	50	50
Effect on profit before tax \| ₨	₨ 646		₨ 615		₨ 499
US Dollar
Disclosure Of Change In Interest Rates On Financial Liabilities Explanatory [Line Items]
Increase / decrease in basis points	0	0	0	0	60	60
Effect on profit before tax \| $		$ 0		$ 0		$ 3

Financial risk management objectives and policies - Summary of Foreign Currency Sensitivity Exchange Rates (Detail) $ in Millions	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019 USD ($)
Bottom of range [member]
Disclosure Of Foreign Currency Sensitivity Exchange Rates [Line Items]
Change in USD rate	(5)	(5)	(5)
Effect on profit before tax			$ (23)
Top of range [member]
Disclosure Of Foreign Currency Sensitivity Exchange Rates [Line Items]
Change in USD rate	5	5	5
Effect on profit before tax			$ 23

Financial risk management objectives and policies - Summary of Credit Risk Exposure on the Group's Trade Receivables (Detail) - INR (₨)
₨ in Millions

Mar. 31, 2021

Mar. 31, 2020

Apr. 01, 2019

₨ 35,980

₨ 25,914

₨ 19,176

Gross carrying amount | 0 - 6 months [Member]

36,542

26,090

Gross carrying amount | 6 - 12 months [Member]

18,621

16,635

^[1]

Gross carrying amount | 12 - 18 months [Member]

9,308

7,383

Gross carrying amount | > 18 months [Member]

1,425

1,572

7,188

500

Expected credit loss | 0 - 6 months [Member]

562

176

Expected credit loss | 6 - 12 months [Member]

^[1]

233

Expected credit loss | 12 - 18 months [Member]

177

Expected credit loss | > 18 months [Member]