Free calculators for rooftop solar in India. Estimate electricity savings, ROI, system size, net metering income, and government subsidy. India-specific data, instant results.
India-specific data · Updated for 2025–26 tariffs and subsidies
Compare ₹28-35/unit diesel generator power with Solar + BESS at ₹6-8/unit LCOE. Calculate fuel savings & payback.
Calculate monthly and annual savings on your electricity bill after going solar. Accounts for your unit consumption, tariff slab, and panel generation.
Calculate return on investment, payback period, and 25-year earnings from a rooftop solar system. Includes subsidy, maintenance, and degradation.
How many panels do you need? Choose wattage (400W–600W), enter your consumption, and get an instant panel count with a visual, roof area, and cost breakdown.
Find out how many kW of solar panels you need based on your monthly electricity consumption and your city's sun hours. Rooftop area requirement included.
Calculate the income you can earn by exporting surplus solar electricity to the grid. State-wise feed-in tariffs included for accurate estimates.
Calculate PM Surya Ghar Muft Bijli Yojana subsidy for your system size. Includes central + state subsidy estimates and net cost after all benefits.
India receives 4–7 kWh per sq metre of solar radiation daily. Most states get 300+ sunny days annually — ideal for solar investment.
Central subsidy of ₹30,000/kW for first 2 kW + ₹18,000 for third kW. Max ₹78,000 per household. Plus additional state subsidies in many states.
Export surplus power to the grid and earn credits. Most states credit at ₹2–5/unit. Net metering significantly improves solar ROI.
Commercial and industrial solar has faster payback (3–5 years) due to higher consumption and peak-hour generation matching usage patterns.
Connect with solar installers, EPC contractors, distributors, and investors across India on BookMyPartner.