India's record renewable generation in July cuts coal's share in power mix to 1-year low
Combined solar and wind output crossed the 100-gigawatt (GW) mark for the first time, peaking at 103.7 GW, and renewable sources accounted for a record 42.8% of India's electricity supply on July 13.
Coal's share in overall electricity generation fell to 65.7% in July, down from 69% in June, marking a one-year low, according to government data.
Renewable sources generated 36.25 billion kilowatt-hours (kWh) in July, a rise of about 30% over the same month a year earlier.
Coal-fired generation itself still rose year-on-year due to reduced hydropower output and a spike in demand linked to above-normal summer heat.
India's Non-Fossil Fuel Capacity Target under its NDC
India's updated Nationally Determined Contribution (NDC), submitted under the Paris Agreement in August 2022, commits to achieving 50% of cumulative installed electric power capacity from non-fossil fuel sources by 2030. This is distinct from the earlier, separate government announcement (at COP26, 2021) of a 500 GW non-fossil capacity target by 2030. India reached the 50% non-fossil installed-capacity milestone in 2025, ahead of the 2030 deadline, with total non-fossil capacity (solar, wind, large hydro, bio-energy, small hydro, and nuclear) crossing 280 GW.
Key Details
- NDC also targets a 45% reduction in emissions intensity of GDP by 2030, compared to 2005 levels.
- The non-fossil capacity target is a capacity (installed MW) target, not a generation (actual electricity produced) target — coal can still supply a majority of actual electricity even after the capacity target is met, because renewables have lower capacity utilisation factors than coal plants.
- This capacity-versus-generation distinction explains why solar and wind can hit a record 42.8% of supply on a single day (July 13) while coal's monthly generation share remains far higher, at 65.7%.
The July generation-mix data illustrates the gap between India's non-fossil capacity target (already on track) and the actual non-fossil share of electricity generated, which remains constrained by the intermittency of solar and wind.
Renewable Purchase Obligation (RPO) and Must-Run Status
States are required to procure a minimum share of their electricity from renewable sources under the Renewable Purchase Obligation (RPO), a regulatory mechanism notified by the Ministry of Power. Since January 2021, Hydropower Purchase Obligation (HPO) has been folded into a Non-Solar RPO category, with a long-term RPO trajectory notified through 2029-30. Renewable generators additionally enjoy "must-run" status, meaning grid operators are required to accept their power ahead of conventional sources whenever it is available, to avoid curtailment.
Key Details
- RPO trajectories are set separately for solar and non-solar renewables and are enforced through the Electricity Act, 2003 framework, with compliance monitored by State Electricity Regulatory Commissions.
- Must-run status is what allows solar and wind output to be dispatched to the grid first, producing the kind of single-day generation-share record (42.8% on July 13) even though average monthly renewable generation share is lower.
- Non-compliance with RPO can attract penalties, and the Renewable Energy Certificate (REC) mechanism allows obligated entities to trade compliance.
Must-run status and rising RPO trajectories together explain why renewable generation is climbing steadily even as coal capacity remains largely unchanged, since grid dispatch rules prioritise renewable output whenever weather conditions permit high solar and wind availability.
Coal's Continued Dominance and Grid Balancing Role
Despite record renewable generation, coal remains the single largest source of electricity in India by both installed capacity and actual generation, because coal plants provide firm, dispatchable "baseload" power that is not weather-dependent, unlike solar (available only in daylight hours) and wind (variable). Reduced hydropower output — itself weather-dependent — during the reporting period required coal plants to compensate for the shortfall, even as renewable generation simultaneously hit new highs.
Key Details
- India's electricity demand has been rising with economic growth and increased use of air-conditioning during hotter summers, adding pressure on all generation sources, including coal.
- Battery storage and pumped hydro storage are the principal technologies being scaled up to store surplus daytime solar power for use after sunset, reducing dependence on coal to fill the evening demand peak.
- The Central Electricity Authority (CEA) publishes daily and monthly generation-mix data of the kind referenced in reports on coal and renewable shares.
The simultaneous rise in both renewable and coal generation in July underscores that India's transition away from coal is a gradual, additive process constrained by the need for firm power to meet peak and non-solar-hour demand, rather than an immediate substitution.
- Combined solar and wind output peaked at 103.7 GW, crossing 100 GW for the first time.
- Renewables accounted for a record 42.8% of electricity supply on July 13.
- Coal's monthly generation share fell to 65.7% in July from 69% in June — a one-year low.
- Renewable generation in July: 36.25 billion kWh, up about 30% year-on-year.
- India's NDC target: 50% of cumulative installed capacity from non-fossil sources by 2030 (submitted August 2022); separate government announcement of 500 GW non-fossil capacity by 2030 (COP26, 2021).
- India crossed the 50% non-fossil installed-capacity milestone in 2025, ahead of the 2030 deadline.