Solar panel cost calculator
Enter your electricity bill, units or roof area and your city. See the system size you need, the cost after subsidy, your yearly savings and the payback time. Works in any country.
How would you like to calculate?
Location
Sunlight data for any place in the world
Prices
Typical values for your country. Change them to match your bill and quote.
PM Surya Ghar subsidy for homes: ₹30,000/kW for the first 2 kW and ₹18,000 for the 3rd kW (up to ₹78,000).
Panel angle, losses and panel size
14% covers typical losses from heat, dust, wiring and the inverter. Use 20–25% for partial shade or dusty roofs.
| Jan | 264 kWh |
|---|---|
| Feb | 284 kWh |
| Mar | 383 kWh |
| Apr | 437 kWh |
| May | 501 kWh |
| Jun | 503 kWh |
| Jul | 501 kWh |
| Aug | 451 kWh |
| Sep | 370 kWh |
| Oct | 314 kWh |
| Nov | 256 kWh |
| Dec | 246 kWh |
Estimated from latitude. Panel tilt 25° (best for this place).
Estimates only, not a quote. Real output depends on shading, weather, panel quality and installation. Savings count solar power you use yourself at today's price, rising 3% a year, with panels losing 0.5% a year.
Use the solar panel cost calculator in 3 steps
- STEP 1
Tell us your use
Enter your monthly electricity bill, the units (kWh) you use, your free roof area or the system size you have in mind.
- STEP 2
Pick your city
Search any city worldwide. We use long-term satellite sunlight data for that spot and typical prices for your country.
- STEP 3
See cost and savings
Get the recommended kW, number of panels, roof space, cost after subsidy, monthly savings, payback and 25-year savings.
More solar calculators
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Typical prices are built in for 28 countries, including India, United States, United Kingdom, Canada, Australia, New Zealand, Germany, France, and sunlight data covers almost every city in the world.
How to work out the cost of solar panels
Start with how much electricity you use: the units (kWh) on your bill, or the bill amount divided by your price per unit. Multiply by 12 for a year.
Divide that by how much 1 kW of panels makes in a year where you live. In sunny places that's about 1,400–1,700 kWh; in northern Europe about 900–1,000 kWh. The answer is the system size in kW.
Multiply the size in watts by the installed cost per watt for your country and subtract any subsidy. Divide that by your yearly savings to get the payback time. The calculator does all of this with real sunlight data for your city.
Solar panel cost calculator FAQ
By using this tool you agree to its Terms of Use and privacy notice.
Multiply the size in watts by the installed cost per watt for your country, then subtract any subsidy. The calculator fills in a typical cost per watt for your country, which you can change to match an installer's quote.
Divide the units you use in a year by how much 1 kW of panels makes a year where you live. For example, 4,200 kWh a year ÷ 1,400 kWh per kW ≈ 3 kW. The calculator does this with real sunlight data for your city.
Net cost divided by yearly savings, with electricity prices rising 3% a year and panels losing 0.5% output a year. Power you export isn't counted, so the estimate is on the safe side.
Yes. For homes in India it subtracts ₹30,000 per kW for the first 2 kW and ₹18,000 for the 3rd kW, up to ₹78,000. Choose Business to see the cost without it.
About 100 sq ft (9.3 m²) of shade-free roof per kW, including gaps and walkways.
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Questions about the solar panel cost calculator?
Stuck, found a bug, or have an idea to make it better? Send a message and we'll reply within 1–2 working days.
- Email us at pketu916@gmail.com
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