[Energy Storage: India proposes mandatory co-located storage for new solar and wind projects from July 2027]
India's Central Electricity Authority has published draft amendments to its technical standards requiring ground-mounted solar and onshore wind projects commissioned after July 1, 2027 to install co-located energy storage equal to at least 10% of installed capacity with a minimum two-hour duration, rising to four hours for projects commissioned from July 2029 through June 2031. The draft also mandates that at least 15% of inverters in renewable plants have grid-forming control, while all power conversion systems of battery storage must be grid-forming, with stakeholder comments open until October 4. More than 8,133 GWh of solar was curtailed in the first quarter of the fiscal year as the grid could not absorb daytime surplus, and the new rules aim to address mounting curtailment and grid stability concerns.