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India eyes mandatory storage for new solar, wind plants

  • Märkte: Battery materials, Electricity
  • 04.09.26

India's power sector regulator, the Central Electricity Authority (CEA), has proposed mandatory co-located energy storage for new ground-mounted solar and onshore wind projects, alongside grid-forming requirements for renewable power plants.

Projects commissioned after 1 July 2027 would need co-located energy storage systems (ESS) with a minimum two-hour duration and capacity equivalent to at least 10pc of installed plant capacity, according to the draft CEA regulations released on 3 September.

The storage-duration requirement would increase to four hours for ground-mounted solar and onshore wind projects commissioned after 1 July 2029 and up to 30 June 2031, while the capacity requirement would remain at 10pc of installed capacity.

A 100MW solar or wind project would therefore need at least 10MW of storage, with a minimum energy capacity of 20MWh under the first phase and 40MWh under the four-hour requirement.

The proposal comes as India's battery storage deployment accelerates. The country added 2,668.54MW of battery energy storage system (Bess) power capacity, equivalent to 7,785.6MWh of energy storage capacity, during 2026, according to government data. Around 47GW of Bess is also being considered for integration by 2031-32.

India's solar and wind capacity has continued to expand rapidly. Solar capacity stood at 164.59GW and wind at 58.14GW as of 31 July, accounting for around 74pc of the country's 300.51GW of non-fossil installed capacity, data from the ministry of new and renewable energy (MNRE) show. Ground-mounted solar accounted for 122.57GW of the total solar capacity, while India added 14.33GW of solar and 2.04GW of wind capacity over April-July, the first four months of the 2026-27 fiscal year.

Solar generation rose by 47pc year on year to 80.87TWh during April-July 2026, while wind generation increased by 5.3pc to 52.07TWh, according to CEA data.

The draft also proposes that renewable power plants commissioned after 1 July 2027 have at least 15pc of inverters with grid-forming control. All power conversion systems (PCS) of Bess would also need grid-forming control.

The requirements would comply with technical requirements specified in its grid-connectivity regulations, CEA said. It would also be able to change the required percentage of grid-forming capability or ESS capacity from time to time.

The CEA has invited comments on the draft until 4 October 2026.


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