National Solar Economics Benchmark (Residential 3 kW)
Typical gross system turnkey cost₹1,80,000 – ₹2,10,000
PM Surya Ghar central DBT subsidy₹78,000
Average monthly electricity generation~360 – 400 units (kWh)
Estimated annual power bill savings₹32,000 – ₹42,000 / year
Typical payback timeline3.0 to 4.2 years
Net homeowner investment₹1,02,000 – ₹1,32,000
Sources: Ministry of New and Renewable Energy (MNRE), National Portal for Rooftop Solar, state DISCOM retail tariffs 2026.. How we calculate
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Savings & PaybackMost Popular
Solar Savings & Payback Calculator
Enter your monthly electricity bill to calculate annual savings, 25-year lifetime return on investment, and expected payback period under state net-metering slabs.
Size & Panel CountEssential
Solar System Size & Roof Area Calculator
Determine how many kilowatts (kW) of solar you need based on monthly power units (kWh) consumed and your available shadow-free rooftop square footage.
Subsidy & Net CostMNRE 2026 Slabs
PM Surya Ghar Subsidy Calculator
Check exact central subsidy entitlement under PM Surya Ghar Muft Bijli Yojana (up to ₹78,000) and state top-up subsidies across 36 Indian states and UTs.
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Frequently asked questions about solar sizing & calculations
How accurate are these solar calculators?+
Our calculations use empirical data from the Ministry of New and Renewable Energy (MNRE), state electricity distribution tariffs (SERC 2026 orders), and regional solar irradiation averages (NASA POWER / NREL). Real yields vary slightly by tilt angle, roof shading, and seasonal weather patterns.
Are these tools updated for the latest PM Surya Ghar subsidy rates?+
Yes. All calculators incorporate the official PM Surya Ghar Muft Bijli Yojana rates: ₹30,000 for 1 kW, ₹60,000 for 2 kW, and ₹78,000 for 3 kW and higher residential rooftop systems.
Do I have to enter my phone number to use the calculators?+
No. All our calculators are completely free and provide instant, interactive results directly in your browser without requiring your phone number or registration.