India crossed a landmark threshold in its energy transition on 6 July 2025, when clean energy sources — comprising renewable energy, hydropower, and nuclear power — supplied 50.02 per cent of the country's total electricity demand of 221.5 GW at 11:46 am IST. According to data from the Power Ministry's Merit Order Despatch of Electricity for Rejuvenation of Income and Transparency (MERIT) platform, this marks the second consecutive year that non-fossil fuel sources have met more than half of India's electricity needs at a given peak moment.

What the Data Shows

The milestone is not an isolated spike. According to research by the Council on Energy, Environment and Water (CEEW), clean energy has exceeded 45 per cent of India's total electricity demand on 50 days since May 2025 alone — pointing to a structural shift in the national grid rather than a one-off achievement. The consistency of these readings, experts say, signals that the supply mix is undergoing a durable transformation.

Disha Aggarwal, Fellow at CEEW, said: 'This already signals a lasting change in the supply mix. CEEW research shows that the next frontier will be to scale flexible energy storage, along with large-scale and distributed renewable energy systems, to meet increasing shares of the evening demand with low-cost renewables.'

Grid Demand and the Monsoon Effect

Power demand has moderated in recent weeks as widespread monsoon rainfall brought relief from extreme summer temperatures. Data from the state-run Grid Controller of India showed peak power demand at 222.5 GW on 6 July, rising to 230 GW on 7 July. Both figures remain well below the all-time peak of 270.8 GW recorded in May 2025 during an intense heatwave. In 2025, India's peak demand had reached 243 GW in June — slightly lower than the prior year's record of 250 GW in May. The government has projected peak demand to touch 271 GW in 2026.

India's Installed Capacity Snapshot

India's total installed power generation capacity stood at 542.3 GW as of 31 May 2025. Of this, thermal power accounts for 250.8 GW, while renewable energy capacity has reached 282.7 GW — meaning clean energy sources now constitute the larger share of installed capacity, even as grid balancing and evening-demand coverage remain ongoing challenges.

The Road Ahead: Storage and Evening Demand

Notably, the 50 per cent milestone was recorded during peak daytime hours, when solar generation is at its strongest. The harder test — and the next frontier, according to CEEW — is sustaining high clean-energy shares during evening demand peaks, when solar output drops and grid operators must rely on storage, hydro, or thermal backup. Scaling affordable battery storage and distributed renewable systems will be critical to extending these gains beyond daylight hours. This comes amid India's broader commitment to achieving 500 GW of non-fossil fuel capacity by 2030, a target that now looks increasingly within reach on the installed-capacity front.