Eagle Construction, OPG Power Win TNGECL’s 1,500 MWh Standalone BESS Auction
Eagle Construction (Eagle Infra India) and OPG Power have won 175 MW/700 MWh each at Tamil Nadu Green Energy Corporation’s auction to develop 375 MW/1,500 MWh of standalone BESS projects in Tamil Nadu.
February 24, 2026. By Mrinmoy Dey
Eagle Construction emerged as the L1 (lowest bid) bidder, quoting a tariff of INR 3.15 lakh/MW/month and secured 175 MW/700 MWh. OPG Power bagged 175 MW/700 MWh at a tariff of INR 3.16 lakh/MW/month. Only 350 MW/1,400 MWh of capacity has been awarded.
The tender was floated in November 2025.
The projects will be set up under the build, own, operate (BOO) model and will be eligible for viability gap funding (VGF) support of INR 18 lakh/MWh.
The BESSD shall be required to set up a BESS, with the primary objective of making the energy storage facility available to the Buying Entity, i.e., TNPDCL, for charging/ discharging of the BESS, on an ‘on demand’ basis. The BESPA shall be valid for a period of 15 years from the date of full commissioning of the Project.
Land allocation for the Projects will be under the scope of TANTRANSCO. Setting up of the BESS and interconnection of the BESS with the STU network will be under the scope of the BESSD.
The application software of the Energy Management System (EMS) of the BESS must be developed indigenously within India. Further, the BESSD must ensure that the BESS installed is of requisite quality as per best industry practices, and refurbished battery cells are not used in the project.
The BESS shall be charged by drawing power from TANTRANSCO/TNPDCL and injecting power into the TANTRANSCO/TNPDCL network. TNPDCL will provide the required power for charging BESS, considering the minimum system efficiency under the agreement.
The bidder must ensure that the BESS can charge and discharge with a Crate of 0.25. Additionally, the BESS must be capable of being charged or discharged in groups from 25 MW/100 MWh to 50 MW/200 MWh, up to the total rated capacity specified in the agreement.
The BESSD must make the BESS available for 1.5 full operational cycles per day, i.e., 1.5 complete charge-discharge cycles per day. The BESSD must guarantee a minimum system availability of 95 percent on an annual basis.
please contact: contact@energetica-india.net.
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