POWERGRID declared as successful bidder under TBCB.

02nd September, 2026 To To The General Manager (Listing), The General Manager (Listing), National Stock Exchange of India Limited, BSE Limited, Exchange Plaza, C 1/G Block, Phiroze Jeejeebhoy Towers, Bandra-Kurla Complex, Dalal Street, Mumbai. Bandra (East), Mumbai Reference: NSE-SCRIP ID: POWERGRID; BSE Scrip Code: 532898 EQ – ISIN: INE752E01010 Sub.: POWERGRID declared as successful bidder under TBCB Dear Sir, In terms of Regulation 30 of the SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015, as amended, this is to inform that Power Grid Corporation of India Limited (“POWERGRID”) has been declared as successful bidder under Tariff Based Competitive Bidding to establish Inter-State Transmission System for the project namely “Transmission system for evacuation of power from Rajasthan REZ Ph-IV (Part-5: 6 GW) [Barmer Complex] Barmer-II: 6 GW (Solar) (LCC Configuration)” on Build, Own, Operate and Transfer (BOOT) basis, at quoted Annual Transmission Charges of Rs. 3,244.33 Crore. The Letter of Intent (LoI) has been received by POWERGRID on 02nd September, 2026. The Project comprises establishment of 6000 MW, ± 800 kV HVDC terminals at Barmer-II (Rajasthan) & South Kalamb S/s (Maharashtra) along with augmentation of South Kalamb S/s. Further, the project involves construction of ± 800 kV HVDC bipole line between Barmer-II & South Kalamb (~1000 km) traversing through the states of Rajasthan, Gujarat and Maharashtra, and construction of 400kV transmission lines traversing through the state of Rajasthan along with the associated bays. The project also involves installation of two SynCon units at Barmer-II PS along with the associated bays. Thanking You, Yours faithfully, (Anjana Luthra) Company Secretary & Compliance Officer Corporate Office: “Saudamini”, Plot No. 2, Sector-29, Gurugram-122001, (Haryana) Tel.: 0124-2822999 & 2822000 Registered Office: B-9, Qutab Institutional Area, Katwaria Sarai, New Delhi-110 016. Tel: 011-26560112, 26560115 & 26560193, CIN : L40101DL1989GOI0381 21 Website: www.powergrid.in