Telangana Power Generation Corporation (TGGENCO) has invited bids to set up 375 MW/1,500 MWh standalone battery energy storage systems (BESS).

Bids must be submitted by December 27, 2025. Bids will be opened on December 31.

Bidders must submit a document processing fee of ₹1 million (~$11,214) per project.

They must also furnish ₹500,000 (~$5,604)/ MW of quoted capacity as earnest money deposit.

Selected bidders must submit a performance bank guarantee of ₹1.25 million (~$14,018)/MW of awarded capacity before signing of battery energy storage purchase agreement (BESPA).

They must also remit ₹100,000 (~$1,121)/ MW of awarded capacity as success charges.

The first project (187.5 MW/750 MWh) will be connected to the 400/220 kV Maheswaram substation, and the other project (187.5 MW/750 MWh) will be connected to the 400/220 kV Choutuppal substation.

Land will be provided on a right-to-use basis at an annual lease fee of ₹1 (~$0.011)/acre/year.

The BESS must be available for one full operational cycle per day, i.e., 1 complete charge-discharge cycle lasting 4 hours.

The BESS must guarantee a minimum system availability of 95% on an annual basis.

The BESS should guarantee an AC-to-AC round-trip efficiency of 85% for the system monthly, excluding auxiliary.

The developer can take a separate metered connection from the distribution companies or draw power from an interconnection point for the BESS’s Auxiliary Power load.

The scheduled commissioning date for the project’s full capacity will be 18 months from the effective date of BESPA.

The BESPA, which will be signed within 30 days of the issuance of the letters of award, will be valid for 15 years from the project’s full commissioning.

The projects will receive viability gap funding (VGF) of ₹1.8 million (~$20,186)/MWh of the awarded capacity. The VGF will be disbursed in three tranches: 20% at financial closure, 50% at commercial operation date (COD), and 30% a year post-COD upon certification.

Only commercially established and operational technologies must be used to minimize technology risk and achieve timely commissioning of the projects.

The net worth of the bidder should be equal to or greater than ₹7.5 million (~$84,111) /MWh of the quoted capacity as of the last date of the previous financial year or as of the day at least 7 days before the bid submission deadline.

Bondada Engineering, Oriana Power, and Pace Digitek won TGGENCO’s earlier auction to set up 250 MW/500 MWh of standalone BESS.

India’s cumulative installed energy storage capacity reached 490 MWh by the end of June 2025, according to Mercom India Research’s India’s Energy Storage Landscape 1H 2025 Report.