India’s power renewable energy industry faces a contradiction that threatens to undermine its rapid expansion. Even as solar installations hit record highs, thousands of units of clean electricity are being curtailed because the grid cannot absorb them. The consequences extend beyond lost generation to developers’ revenues, industrial competitiveness, investment confidence and the economics of India’s energy transition.
The latest warning comes from South Gujarat, where industries operating captive solar and wind plants have complained about repeated generation restrictions and the lapsing of energy units. The Southern Gujarat Chamber of Commerce and Industry has raised the matter with authorities, seeking predictable curtailment guidelines and simpler energy banking rules. The complaints highlight a problem extending well beyond Gujarat’s industrial clusters.
The scale is already significant. India curtailed 8,133 gigawatt-hours (GWh) of solar electricity during April-June 2026, according to data furnished by the Ministry of New and Renewable Energy in Parliament. Curtailment stood at 2,417 GWh in April, climbed to 3,235 GWh in May and eased to 2,481 GWh in June. Transmission bottlenecks and grid security requirements were cited as the principal reasons.
These losses come amid unprecedented capacity expansion. India installed 27 GW of solar capacity in the first half of 2026, up 49% from 18 GW a year earlier. Solar accounted for 76% of the country’s 36 GW of new power capacity, according to Mercom India Research. Yet, adding generating capacity without matching transmission and storage infrastructure risks producing electricity that cannot reach consumers.
For developers, curtailment directly affects project economics. Lower electricity sales mean weaker revenue realisation, potentially complicating debt servicing and future financing. For industrial consumers investing in captive renewable plants, unpredictable generation restrictions weaken the financial assumptions behind their investments.
There is also a broader economic contradiction. India is curtailing solar electricity during daylight hours while facing tight supplies and elevated electricity prices during non-solar hours. The Indian Energy Exchange’s high-price day-ahead market recently witnessed prices reaching its ₹20-per-unit ceiling amid strong demand and constrained supply. The challenge is increasingly about delivering electricity when and where it is needed.
Storage must therefore become integral to renewable expansion. The Central Electricity Authority has proposed mandatory co-located storage for ground-mounted solar and onshore wind projects commissioned after July 1, 2027. The draft requires storage equivalent to at least 10% of installed capacity for two hours, rising to four hours for projects commissioned after July 1, 2029.
However, storage mandates alone cannot resolve the problem. Transmission projects must be synchronised with renewable commissioning, while grid operators need better forecasting, flexible generation and transparent curtailment protocols.
Regulators should also establish consistent reporting of curtailed electricity, distinguish technical restrictions from commercial decisions and clarify compensation arrangements where applicable. Such transparency would help investors assess project risks and prevent avoidable disputes.
Industrial energy banking arrangements need attention too. Clear rules governing unused generation could improve the commercial viability of captive renewable investments without compromising grid security.
India’s next renewable energy milestone should not be measured solely in gigawatts commissioned. It must also reflect electricity successfully delivered, stored and consumed.
Without stronger grids, storage and regulatory certainty, record capacity additions could translate into rising financial losses rather than greater energy security. The transition will succeed only when installed renewable capacity becomes usable electricity.
