Solar Overtakes Wind in Global Power as India's Evening Fossil Ramp Deepens
An Ember analysis shows solar hit 10% of global electricity in H1 2026, but fossil generation is rising after sunset to fill the gap.
India's fossil-fired generators averaged 125 gigawatts at 1 p.m. in the first half of 2026, down 10 GW from the same hour in H1 2023, according to an Ember report published on 12 August (2026-08-12). The gap sounds like progress. But those same generators were running at 168 GW after dark in H1 2026, up 22 GW from three years earlier. Solar has hollowed out the midday hours. The evening load has grown to fill the space.5
The Ember data, covered by Asian Power on 17 August (2026-08-17), put solar at 10% of global electricity in H1 2026, up from 8.9% in H1 2025 and 5.6% in H1 2023. Global solar generation doubled from 769 terawatt-hours in H1 2023 to 1,564 TWh in H1 2026. That pace pushed solar past wind as the single largest source of renewable electricity growth — the first time solar has held that position globally.5
The distribution of that output exposes the grid problem directly. Between 11 a.m. and 2 p.m. on an average day in H1 2026, solar met more than 25% of global electricity demand, Ember said. By 8 p.m. the solar contribution fell to near zero. The swing from midday surplus to evening shortfall is now the defining operational challenge across solar-heavy markets, not just in India.5
India shows the arithmetic most starkly. Generation peaked at 174 GW at 7 p.m. in H1 2026, leaving a gap of almost 50 GW between the midday trough and the evening high, the Ember report showed. Peak demand reached 271 GW during the period, Asian Power reported on 4 August (2026-08-04), as the grid strained to manage record renewable output alongside rising curtailment. India's solar share crossed 10% of the national power mix for the first time in the first quarter of fiscal year 2026-27.5,3
Solar's midday displacement is real. Whether it produces lasting reductions in coal consumption depends on how the evening ramp is met. Curtailment has risen alongside generation gains, suggesting the transmission and storage build is lagging behind the panels. Coal generation ramps after sunset to meet evening demand, Ember said.3,5
Ember put the battery math plainly: with expected additions of 459 gigawatt-hours in 2026, batteries could shift 34% of new daily solar generation into non-sunny hours. That projection leaves the other 66% either curtailed or backed by thermal plant. If battery additions trail that figure, the evening fossil ramp widens further.5
China is pursuing a structural answer. A 1 GW project in the Gobi Desert combines conventional solar panels with a molten-salt thermal battery capable of storing energy for up to eight hours overnight, OilPrice.com reported on 13 August (2026-08-13). The facility's 100 MW first phase has installed 15,927 heliostats across an 8.6-million-square-foot field. China's wind and solar capacity together nearly doubles the rest of the world combined, OilPrice.com said, but deployment of the grid infrastructure to support that scale has not matched the pace of new panels.4
The global picture has shifted more broadly. In April 2026, wind and solar together produced more electricity in the United States than natural gas in any single month on record, Canary Media reported. The IEA estimated that solar photovoltaics met more than 25% of the world's new energy demand in 2025, ahead of gas at 17%. Renewables generated 34% of global electricity in 2025, just above coal's 33%, the first time in over a century that coal has not led.2,1
For fossil fuel markets, the commercial implication runs through the shape of demand rather than the volume. Coal and gas generators in solar-heavy grids are being pushed toward peak-hours ramp duty rather than baseload, compressing their utilisation while maintaining their installed capacity. Newcastle coal physical was quoted at $122.25 per tonne as of 18 August (2026-08-18). Midday displacement does not equal volume destruction when the evening ramp is steepening by 22 GW in a single major market.5
The near-term signal is battery deployment. Ember's 34% solar-shift estimate rests on 459 GWh of new storage additions in 2026. India's near-50 GW daily swing between midday trough and evening peak is the clearest live indicator of whether that storage is materialising fast enough to contain the evening fossil surge, or simply redistributing the hours in which coal is needed.5