The story. India's state-run Solar Energy Corp. (SECI) just secured a record-low price — 5.99 rupees, or about 6.8 cents per kilowatt-hour — for renewable power that's guaranteed available during four hours of peak evening demand, when solar alone can't help because the sun's down. Three developers, including Waaree Energies, won contracts pairing solar or wind with storage to deliver that reliability.

The bigger picture. This matters because India's grid still leans heavily on coal, which generated 1,474 terawatt-hours in 2025 versus just 196 TWh from solar and 104 TWh from wind (Ember). That mix gives India a carbon intensity of 671 grams of CO2 per kilowatt-hour — well above both China's 526 and the global average of 459 (Ember, 2025). The tariff breakthrough is possible partly because of India's solar resource: the country averages 4.8 kWh/m² of sunlight per day and 9.7 hours of sunshine daily (Open-Meteo, 2025), giving developers ample generation to charge storage cheaply during the day and discharge it during evening peaks — traditionally coal's stronghold.

The tension. Cheap peak-hour renewables undercut the main economic argument for keeping coal plants running around the clock. But India's total electricity demand is still growing fast, and coal remains nearly five times larger than solar and wind combined. One low tariff in a 1.5-gigawatt tender is a signal, not yet a shift — the real test is whether this pricing scales to the many multiples of coal's current generation.