Solar ROI Calculator
Payback period, net cost after subsidy, annual and 25-year savings — based on your real bill.
Open calculator →💸PM Surya Ghar Subsidy Checker
Check your eligibility and exact central subsidy amount for your planned system size.
Check subsidy →📐Panel Size Calculator
The system size (kW) and roof area you need to hit your bill-offset target.
Find my size →🔋Battery Backup Calculator
Size the battery bank for night-time or cloudy-day backup power.
Size my battery →🔄Net Metering Earnings
What your exported surplus solar units are worth, at your DISCOM's rate.
Calculate earnings →How PM Surya Ghar makes solar affordable
PM Surya Ghar: Muft Bijli Yojana is the central government's rooftop solar scheme for households. It pays ₹30,000/kW for the first 2 kW and ₹18,000 for the 3rd kW, capped at ₹78,000 — credited to your bank account after installation.
Combined with net metering and telescopic tariffs (where solar offsets your most expensive units first), a typical 3 kW system pays for itself in roughly 4–6 years and then generates largely free power for two decades.
Get 3 free installer quotes
Frequently asked questions
How is solar savings calculated on DesiMetrics?
We value the units your system offsets against your own DISCOM’s real telescopic tariff, so savings reflect your actual marginal rate rather than a flat national average.
What is PM Surya Ghar?
PM Surya Ghar: Muft Bijli Yojana is the central government’s rooftop solar subsidy scheme, paying up to ₹78,000 for a home system. Check your exact amount on our subsidy calculator.
Do I need net metering for solar to pay off?
Yes — net metering is what lets your DISCOM credit you for units you export back to the grid, which is how the offset savings shown in our ROI calculator actually land on your bill.
Is getting matched with installers free?
Yes, there is no charge to submit your details and get quotes — see our affiliate disclosure for how we’re compensated by partner installers.
Which solar calculator should I start with?
If you just want to know your payback period, start with the ROI calculator. If you're not sure what system size you need first, start with the panel size calculator instead — it tells you the kW to plug into the ROI calculator.
Do these calculators work for every Indian state?
Yes — pick your DISCOM in any calculator and it's priced at that state's real, source-cited tariff, the same 36-DISCOM data behind our electricity bill calculators.
Can I size a system for battery backup as well as bill savings?
Yes — size the panels for savings with our panel size or ROI calculator, then size a separate battery bank for backup with our battery backup calculator. The two are calculated independently, since backup depends on your critical loads, not your total consumption.
How is the environmental impact of solar calculated?
From your system's estimated annual generation, converted using India's indicative national grid emission factor — see the full breakdown with sources on the ROI calculator.
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