REPowerEU mandates rooftop solar on all new public and commercial buildings over 250 m² from 2026, existing public buildings over 250 m² from 2027, and all new residential buildings from 2029.
Project Sunroof is a solar calculator from Google that helps you map your roof's solar savings potential. Learn more, get an estimate and connect with providers.
Follow this step‑by‑step guide to installing rooftop solar panels at home, covering assessment, permits, equipment, installation, and system maintenance.
Most residential panels in 2025 are rated 250–550 watts, with 400-watt models becoming the new standard. A 400-watt panel can generate roughly 1. 5 kWh of energy per day, depending on local sunlight.
According to a government release, the PM Surya Ghar scheme, approved in February 2024, aims to bring rooftop solar to one crore homes. As of December 2025, around 23. 9 lakh households have already installed these systems, generating 7 GW of clean power.