SolarCost.in
Free planning tool

Solar cost and savings calculator

Use a recent bill, your state and clear roof area. The estimate updates from the assumptions shown beside it.

Last reviewed 3 September 2026Estimates, not a quotation

Your details

Use a recent bill. If your use changes by season, enter a 12-month average.

₹ per month
₹ per kWh, excluding fixed charges if known
Used for solar yield and special category CFA
sq ft after tanks, shade and walkways
kW. Leave at 0 for a size based on your bill.
Central household CFA is not applied to commercial use
Battery preference

Your planning estimate

Suggested system3.0 kW
₹1.02L–1.62Lcost after estimated CFA
₹78,000potential central CFA
4,650 kWhestimated first year generation
₹31,600estimated annual bill savings
3.2–5.1 yearssimple payback range
270 sq ftroof area allowance

Assumes ₹60,000 to ₹80,000 per kW, 1,550 kWh per kW per year, 85% effective energy value, and full standard-state household CFA eligibility.

How the estimate works

We divide your estimated annual electricity use by a solar yield assumption for your state, then round to the nearest 0.5 kW. Roof capacity uses 90 sq ft per kW. If your entered roof is smaller, the tool limits the system and tells you.

The installed cost uses a broad range of ₹55,000 to ₹85,000 per kW. Larger systems use lower rates for each kW. A selected battery adds a planning allowance of ₹20,000 to ₹30,000 per kWh. Actual battery quotes vary widely.

Annual savings value solar energy at 85% of your entered tariff, or 90% with a battery, and cap savings below your present annual bill. This allows for fixed charges, seasonal mismatch and export terms. It does not model tariff inflation, finance interest, panel degradation or major replacement costs.

Subsidy assumptions

For a residential connection, the calculator applies the published PM Surya Ghar CFA formula: ₹30,000 per kW for the first 2 kW and ₹18,000 for the next 1 kW in standard states. Higher rates apply to the listed special category states and territories. It applies no extra CFA above 3 kW.

Verify before you buy The result assumes an eligible household with a grid connection, a registered vendor, compliant equipment and successful portal and DISCOM steps. State support is not included. Confirm the live amount at pmsuryaghar.gov.in.