Nine companies have won Gujarat Urja Vikas Nigam’s (GUVNL) auction to develop 2,000 MW/4,000 MWh of standalone battery energy storage systems (BESS) across Gujarat (Phase VII).

Sun Drops Energia, ENGIE Energy, Mecpower Solutions, Samavist Energy Solutions, Stockwell Solar Services, Solar 91 Cleantech, Viviana Power Tech, Rajesh Power Services, and Ultimate Flexipack are the winners.

Sun Drops won 445 MW/890 MWh at a tariff of ₹185,390 (~$2,091.49)/MW/month. Engie was awarded 280 MW/560 MWh at a tariff of ₹187,000 (~$2,109.66)/MW/month. Mecpower bagged 65 MW/130 MWh at a tariff of ₹187,994 (~$2,120.87)/MW/month.

Samavist won 100 MW/200 MWh at a tariff of ₹188,499 (~$2,126.57)/MW/month. Stockwell was awarded 130 MW/260 MWh at a tariff of ₹188,991 (~$2,132.12)/MW/month.

Solar 91 and Viviana both secured 65 MW/130 MWh each at a tariff of ₹188,992 (~$2,132.13)/MW/month and ₹188,993 (~$2,132.14)/MW/month, respectively.

Rajesh and Ultimate both quoted a tariff of ₹189,000 (~$2,132.22)/MW/month to win 65 MW/130 MWh and 450 MW/900 MWh, respectively.

The tender was floated in July this year.

The proposed BESS installations will be connected to Gujarat Energy Transmission Corporation’s 220 kV Shelavadar, 400 kV Bhogat, 400 kV Shapar, 400 kV Charanka, 220 kV Virpore, 400 kV Asoj, 132 kV Nandesari, 132 kV Tilakwada, 132 kV Vasedi, 132 kV Limkheda, 132 kV Valia, and 220 kV Wagra substations.

The project will receive viability gap funding (VGF) of ₹1.8 million (~$20,306.86)/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.

The scope of work encompasses the design, construction, and operation of the storage systems, including all necessary infrastructure up to the delivery point, as well as the construction of transmission lines. It also includes compliance with metering and dispatch protocols issued by the state load dispatch center and GUVNL.

Selected bidders must ensure a system availability of 95% annually. Round-trip efficiency must be at least 85%.

The battery energy storage purchase agreement (BESPA) will be signed for 12 years, commencing from the date of full commissioning. The scheduled commissioning date is set at 18 months from the effective BESPA date, with a provision for an additional nine months under liquidated damages.

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.