India’s rapid expansion of solar power is reducing fossil fuel based electricity generation during the daytime but coal fired generation continues to rise after sunset as electricity demand remains high, according to an analysis by Ember.
The analysis found that average fossil fuel generation at 1 pm fell to about 125 GW in the first half of 2026, compared with 135 GW during the same period in 2023. However, fossil generation between 5 pm and 7 am increased by 22 GW to an average of 168 GW.
Ember said the growing gap highlights the need for battery storage and greater flexibility in India power grid. Batteries can store surplus solar electricity generated during the day and supply it during evening peak hours, reducing dependence on coal.
On sunny days, coal plants are already approaching their technical minimum output, which can result in renewable energy being curtailed. Ember also noted that battery costs have fallen sharply, making large scale storage increasingly economical.
Globally solar generated more than 10 per cent of electricity in the first half of 2026. Ember estimates that global battery additions could reach 459 GWh this year.
For India experts say combining solar expansion with storage grid upgrades and suitable market reforms will be crucial to reducing fossil fuel dependence after sunset.