Solar Savings Calculator
Home & ConstructionSee what a rooftop solar system would save on your bill and how long it takes to pay for itself.
Runs entirely in your browser — nothing is uploaded
Features
- Payback period from your actual bill and local tariff.
- Monthly, yearly and 25-year savings.
- Adjustable installed cost and subsidy.
- Sizes the system from what you consume, not from your roof.
- Runs in your browser.
How to use the Solar Savings Calculator
- 1Enter your average monthly bill and your tariff per unit.
- 2Adjust the installed cost per kW to match a quote you have been given.
- 3Add any subsidy you qualify for, then read the payback period.
Frequently asked questions
How long does rooftop solar take to pay back?
Typically four to seven years in India once a subsidy is applied, and longer where tariffs are low. The two things that decide it are your tariff — the higher it is, the more each generated unit saves — and whether your state pays for exported units.
Will solar cover my whole bill?
Only up to what you generate and use. Without net metering, units generated while nobody is home are simply wasted, so a system sized well beyond daytime consumption does not pay. Check your state’s net metering rules before sizing beyond your own use.
What does this leave out?
Panels lose about half a per cent of output a year, and the inverter usually needs replacing around year 10 to 12. Neither is in the payback figure, so treat the result as an optimistic first pass and get real quotes.