Renewable energy now makes up about 42% of India's installed power capacity. Examine the gap between capacity and generation, and what it means for grid infrastructure.

As of March 2026, renewable energy sources (RES) made up 2,23,273 MW of India's 5,32,739.7 MW of installed capacity, about 42% [1]. But installed capacity is the most power plants could produce, not what they actually deliver. The gap between the two is now the real test of whether India's grid is ready for the energy transition.

Nature and causes of the gap

• Share of capacity vs. share of generation: solar and wind held about 37% of installed capacity but produced only about 13% of electricity in 2024-25 [2].
• Low capacity utilisation factor (CUF): solar produces at most about 20–22% of its full capacity over a year, against about 90% for coal [3]. One MW of solar therefore produces far less energy than one MW of coal.
• Intermittency: solar works only by day and wind varies by season, so output does not match the evening peak in demand.
• Curtailment: the grid turns away green power when it cannot carry or store it. NITI Aayog notes there is no transparent public data on curtailment or its causes [4].

Implications for grid infrastructure

• Storage deficit: about 5.5 GW of storage against 243 GW of renewable capacity. The Standing Committee on Energy projects a need of 61 GW by 2030 [5].
• Transmission mismatch: CAG's audit of solar parks found significant delays in building pooling stations [6], which can leave generation stranded.
• Grid stability: because renewables are intermittent, raising their share of generation must be carefully sequenced, and coal and hydro must ramp up and down to balance them [2].
• Monitoring blind spot: MoSPI's PAIMANA dashboard reports a 12.1% rise in capacity [1] but not generation or curtailment. This makes the transition look further along than it is.

Way forward

• Report renewables' share of generation and a curtailment indicator alongside capacity [1][4].
• Expand battery and pumped-hydro storage, backed by the Committee's suggested grants for storage research [5].
• Build pooling stations and transmission lines at the same pace as solar parks [6].
• Use time-of-day tariffs to shift demand into solar hours.

The 42% figure is a real milestone, but it counts plants built, not clean power delivered. If storage, transmission and generation-based monitoring grow at the same pace as capacity, India can turn installed capacity into reliable green electricity. That would move it towards its 500 GW non-fossil target and SDG 7 (affordable and clean energy).