United States securities and exchange commission logo September 22, 2022 Kedar Upadhye Chief Financial Officer ReNew Energy Global plc c/o Vistra (UK) Ltd 3rd floor, 11-12 St James's Square London SWIY 4LB, United Kingdom Re: ReNew Energy Global plc Form 20-F for the Fiscal Year ended March 31, 2022 Filed July 25, 2022 File No. 001-40752 Dear Mr. Upadhye: We have reviewed your filing and have the following comments. In some of our comments, we may ask you to provide us with information so we may better understand your disclosure. Please respond to these comments within ten business days by providing the requested information or advise us as soon as possible when you will respond. If you do not believe our comments apply to your facts and circumstances, please tell us why in your response. After reviewing your response to these comments, we may have additional comments. Form 20-F for the Fiscal Year ended March 31, 2022 Operating and Financial Review and Prospects, page 77 Non-IFRS Financial Measures, page 88 1. We note that you present the non-IFRS measures of Adjusted EBITDA and Cash Flow to Equity (CFe) as performance measures, although you reconcile Adjusted EBITDA from your measure of "Total Income," which is predominantly revenue and other income, and you reconcile CFe from your non-IFRS measure of Adjusted EBITDA. Please refer to Item 10(e) of Regulation S-K, applicable via General Instruction C(e) to Form 20-F, for guidance on disclosures of non-GAAP measures. Under this guidance you should present the most directly comparable IFRS financial measure with equal or greater prominence, and provide a reconciliation from this measure to your non-IFRS measure. Kedar Upadhye ReNew Energy Global plc September 22, 2022 Page 2 We believe that you should revise your presentation of such non-IFRS measures to identify IFRS Net Loss as the most directly comparable IFRS financial measure, and reconcile each of your non-IFRS measures from IFRS Net Loss, for each period. For the Adjusted EBITDA measure, please also disclose the reasons for the $36 million adjustment - share based payment expense, which appears to be a portion of the listing and related expenses of $139 million reported on page F-6, to clarify how it has been derived and how it is meaningful in presenting your non-IFRS measure. For the CFe measure, please also disclose the reasons for the $75 million adjustment - normalized loan repayment, which is described on page 90 as "repayment of scheduled payments as per the loan agreement," to clarify how it has been derived and is meaningful in presenting your non-IFRS measure, also clarifying how it compares to, and is more meaningful than, the actual loan repayment amounts, in your view. Note 18. Interest-Bearing Loans and Borrowing, page F-61 (ii) Compulsorily Convertible Debentures, page F-61 2. For each compulsorily convertible debenture (CCD) outstanding at March 31, 2022 and March 31, 2021, please expand your disclosures pertaining to the terms of conversion to address the following points: Quantify the number of shares that would need to be issued to settle the outstanding balance of the CCD at the end of each period. Describe the conversion provisions and specify the periods and the fixed and/or variable conversion terms that would apply. Expand footnote * to the terms of conversion table as necessary to clarify the significance of the 1:1 conversion ratio. We remind you that the company and its management are responsible for the accuracy and adequacy of their disclosures, notwithstanding any review, comments, action or absence of action by the staff. You may contact Lily Dang at (202) 551-3867 or John Cannarella at (202) 551-3337 if you have questions regarding comments on the financial statements and related matters. Please contact Karl Hiller, Branch Chief at (202) 551-3686 with any other questions. FirstName LastNameKedar Upadhye Sincerely, Comapany NameReNew Energy Global plc Division of Corporation Finance September 22, 2022 Page 2 Office of Energy & Transportation FirstName LastName