India’s Central Electricity Authority (CEA) has proposed new technical requirements for renewable energy projects, including mandatory grid-forming inverters and co-located energy storage for new ground-mounted solar and onshore wind projects.
Under the draft proposal, renewable energy power plants commissioned after July 1, 2027, must have at least 15% of their inverters equipped with grid-forming control. In addition, all power conversion systems (PCS) of battery energy storage systems (BESS) would be required to have grid-forming control to comply with the technical requirements specified under the Central Electricity Authority (Technical Standards for Connectivity to the Grid) Regulations.
The draft also proposes that ground-mounted solar power plants and onshore wind power plants commissioned after July 1, 2027, must be equipped with a co-located energy storage system (ESS) with a minimum storage duration of two hours and a power capacity equivalent to at least 10% of the plant’s installed capacity.
For example, a 100 MW solar plant would be required to have at least 10 MW of storage for two hours.
Ground-mounted solar and onshore wind power plants commissioned from July 1, 2029, through June 30, 2031 would be required to have a co-located ESS with a minimum storage duration of four hours and a power capacity equivalent to at least 10% of the plant’s installed capacity.
The proposed requirements form part of the CEA’s draft Central Electricity Authority (Technical Standards for Construction of Electric Plants and Electric Lines) 2nd Amendment Regulations, 2026, notified on Sept. 3.
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