Last updated: 21 June 2026
Solar Subsidy Calculator India
Estimate your rooftop solar subsidy, net cost, bill savings, roof area and payback period.
- Subsidy and net costApplies the versioned central rule table to your selected system.
- Savings and paybackUses editable tariff, consumption and generation assumptions.
- Roof area neededStarts with a conservative 100 sq ft per kW planning allowance.
Independent calculator — not a government website.
Central subsidy slabs
For eligible residential households under PM Surya Ghar.
Up to 1 kW
₹30,000
Up to 2 kW
₹60,000
3 kW or higher
₹78,000
maximum
No extra central subsidy beyond 3 kW.
How this estimate works
Simple assumptions, kept visible and editable.
- 1
Size your system
Monthly units and state solar yield suggest a practical kW size.
- 2
Apply subsidy slabs
Residential mode applies the central slabs up to the ₹78,000 cap.
- 3
Estimate savings
Generation is limited to your usage before the tariff is applied.
State solar calculators
Start with an editable tariff and yield assumption for your state.
Frequently asked questions
Clear answers, with the important caveats left in.
How much subsidy can I get for rooftop solar in India?
The calculator uses an estimated central subsidy of ₹30,000 for 1 kW, ₹60,000 for 2 kW and a maximum of ₹78,000 for 3 kW or more for eligible residential households. Verify current values and eligibility on the official portal.
Is the PM Surya Ghar subsidy available for commercial buildings?
Do not assume the residential central subsidy applies. Commercial mode shows zero subsidy and a clear warning in this calculator.
How much roof area is needed for a 3 kW solar system?
The planning estimate is about 300 sq ft, using 100 sq ft per kW. The usable area must account for shade, obstructions, spacing and access.
How much electricity does a 3 kW solar system generate per month?
At the default India yield of 4.2 units per kW per day, about 378 units per month. State and site conditions can move this estimate up or down.
Can I get subsidy for more than 3 kW?
The default central amount is capped at ₹78,000, so the estimate does not increase beyond 3 kW.
Is this website official?
No. It is an independent calculator and is not affiliated with the Government of India, MNRE, PM Surya Ghar or any DISCOM.
How accurate is the calculator?
It is useful for preliminary planning. Real generation, cost, tariff benefit, eligibility and payback depend on site and official checks.
Should I verify with my DISCOM?
Yes. Confirm feasibility, metering, connection limits, process, approved equipment and final eligibility with the official portal and your DISCOM.
Get rooftop solar quotes
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