Both Karnataka and Tamil Nadu rank among the top states for installed solar capacity. Karnataka has strong irradiation and an early mover advantage; Tamil Nadu has caught up with large utility projects and a growing rooftop and open-access market.
We compare net metering, open access, subsidies, and approval timelines so C&I and residential consumers can weigh the two. The “better” state depends on your load profile, location, and whether you prefer rooftop or offsite solar.