India Curtailed Solar Output While Power Demand Hit Records in Q1 FY2027
India's grid wasted renewable generation during its hottest quarter on record even as peak demand reached 271GW and coal output climbed to an all-time high.
India's solar generation crossed 10% of the national power mix for the first time in the first quarter of fiscal year 2026-27, reaching a record 10.9% share — yet the grid was simultaneously curtailing renewable output, according to a quarterly energy snapshot published by the Centre for Research on Energy and Clean Air in early August (2026-08-04). Peak power demand hit an all-time record of 271 gigawatts on May 21 (2026-05-21), up 12% from the equivalent Q1 FY2025-26 peak. The grid added generation faster than it added the infrastructure to absorb it.5
Total electricity generation rose 9% year on year to 524 billion units during April-June 2026, CREA reported, with solar output jumping 37% to 57 billion units and accounting for 36% of the overall increase in generation — compared with just 11% in the same quarter two years earlier. But the system cannot always use what it produces.5
The timing mismatch explains part of the problem. During 61 of the 91 days in Q1 FY2026-27, the daily demand peak occurred during solar generation hours — meaning curtailment happened even when conditions should have been favorable for solar to contribute. Evening demand driven by air-conditioning that persists after sunset routinely outpaced what the grid could deliver. Peak net load hits around 8 p.m. in Indian summers and remains only about 10% below peak levels at 4 a.m., when solar contributes nothing, according to Asian Power.5,3
Coal is absorbing the gap. India's coal-powered generation in June 2026 surged 14% year on year to 120.20 billion kWh — its highest on record, Reuters noted — driven by El Nino-linked drier conditions that reduced hydro output and heat that sustained cooling demand through the night. Coal and lignite produced 369 billion units in Q1 FY2026-27 alone, accounting for around 70% of total generation.4,5
The stress on May 21 (2026-05-21) was acute. When demand hit 270.82GW with an evening peak of 246GW, dispatchable capacity was running at around 90% of available output, leaving almost no margin for spikes or outages. India recorded an energy shortage of 15.02 million units that evening. On a separate day during the same period, the shortfall reached 15.87 million units, equivalent to 0.2% of total demand — four times the 0.05% permissible limit set by the Central Electricity Authority.3,2
Around 40GW of thermal generation capacity — roughly 15% of India's 239GW installed thermal fleet — was simultaneously under forced outage due to technical faults, LiveMint reported. The coincidence of curtailed solar in the afternoon and power shortages by evening points to a system with poorly matched capacity rather than a simple shortage of installed generation.2
The scale of India's solar buildout makes the curtailment harder to wave off. Solar photovoltaic capacity has accounted for around two-thirds of all new power capacity additions since 2019 and hit a record 50GW of new additions in 2025 alone. By June 2026, installed solar capacity stood at 162GW, with non-fossil sources making up about 54% of India's total installed capacity of 549GW. Yet coal and lignite, at 231GW of installed capacity, still dominate actual output. Capacity and generation are very different numbers.3,5
All 50 of the hottest cities in the world were in India during April and May 2026, The Diplomat reported, with high temperatures and humidity persisting into subsequent months. Demand has grown at roughly 5% per year since 2019, rising from around 180GW to 271GW, with cooling accounting for slightly more than 10% of annual electricity use. Rooftop solar installations under the PM Surya Ghar scheme crossed 3.1 million households in FY26, with applicant conversion rates improving from roughly one in four to nearly one in two — yet grid infrastructure in states including Assam, Odisha, Uttar Pradesh and Bihar is visibly struggling to keep pace, according to The Hindu BusinessLine.6,3,1
Newcastle coal physical prices stood at $124.55 per tonne (2026-08-22). With Indian coal consumption at record levels and hydro constrained, thermal coal's demand floor from India looks firm heading into the second half of the year. The unresolved question for the Indian power market is how quickly the 40GW of forced thermal outages gets restored — if it persists into the next heat event, grid shortages will return before new dispatchable capacity or storage can fill the evening gap.4,2