Most solar companies set the price according to the solar system's wattage. A solar installation's “cost per watt” is a little like the “price per square foot” when you buy a house.

India installed 3.2 GW of rooftop solar capacity in 2024, a more than 88% increase from 1.7 GW in 2023. The 2024 growth was largely driven by record residential installations, according to Mercom ...