Key facts
- 118.6 GW of renewable energy capacity was curtailed in India in September.
- 96.9 GW of solar and 21.7 GW of wind capacity were affected.
- Key reasons include demand-generation mismatches and transmission constraints.
Grid constraints, limited battery storage, and demand-generation mismatches led to India curtailing 118.6 gigawatts (GW) of solar and wind power capacity in September, according to data from JMK Research & Analytics. The affected capacity included 96.9 GW of solar and 21.7 GW of wind power. This situation highlights a growing gap between India's rapid expansion of renewable energy capacity and the development of its grids, transmission infrastructure, and battery storage. Between May and August, curtailments had already surged fourfold compared to the previous year following the addition of 44.6 GW of new solar capacity. Over 4% of solar power generated in July and August was also curtailed due to grid and operational constraints. To address these issues, India plans to mandate battery storage for new solar and wind energy projects starting July 2027.