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Tools

Free solar calculators for India.

Work out your subsidy, system size, savings, payback and more in seconds — built on real 2026 India numbers. No sign-up, no spam.

For homeowners

Solar rooftop calculator The all-in-one: bill → size, cost, subsidy, savings, payback and CO₂. Open tool → PM Surya Ghar subsidy calculator Your exact central subsidy for any system size — up to ₹78,000. Open tool → System-size calculator Turn your monthly bill into the right kW, cost, subsidy and payback. Open tool → Solar savings calculator Your monthly, yearly and 25-year savings from a rooftop system. Open tool → Payback & ROI calculator Net cost after subsidy, payback period and 25-year return. Open tool → Panel-count & roof-area How many panels and how much roof a given kW needs. Open tool → Inverter & battery load calculator Size the inverter and battery to run your home in a power cut. Open tool → Solar loan EMI calculator Monthly EMI, total interest, and whether savings cover it. Open tool → Solar water heater calculator Right size (LPD), price and yearly savings vs an electric geyser. Open tool → CO₂ savings calculator The carbon your system saves each year — in tonnes and trees. Open tool → Cleaning & AMC cost calculator Budget yearly cleaning and maintenance for your system. Open tool →

For installers

Solar proposal generator Turn size + price into a client-ready quote with savings & payback — print to PDF. Open tool → List your company Get matched with homeowners near you and access branded proposals. Partner with us →

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