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Solar rooftop calculator

Built by the Solar Samachar editorial desk · Figures updated for 2026

In shortEnter your monthly bill to size your rooftop solar plant and see the cost, PM Surya Ghar subsidy, net price, yearly savings, payback and CO₂ — the complete picture in one calculator, built on real 2026 India figures.
—Recommended plant
—Net cost after subsidy
—Yearly savings
—Payback

Generation: —/day · Gross cost: — · Subsidy: — · Roof: — · CO₂ saved: —/yr

Assumes ~4 units/day per kW, ~₹65,000/kW installed, PM Surya Ghar subsidy (max ₹78,000), and net metering. Indicative 2026 — verify with quotes and the official portal.

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What this calculator shows you

See real prices for your home

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FAQs

How does a solar rooftop calculator work?

You enter your monthly electricity bill; it estimates the system size (kW) you need, the cost, your PM Surya Ghar subsidy, net price, yearly savings and payback — using standard India figures like ~4 units/day per kW.

How much does a rooftop solar plant cost in India?

About ₹55,000–₹75,000 per kW installed before subsidy (indicative 2026). A typical 3 kW home plant is ~₹1.65–2.25 lakh before subsidy, and far less after the ₹78,000 PM Surya Ghar subsidy.

What size rooftop system do I need?

Roughly your monthly units ÷ 120 (because 1 kW makes about 4 units a day, ~120 a month). Most Indian homes land between 2 kW and 5 kW.

Is this the same as the government solar calculator?

It uses the same core logic (bill → size → subsidy → savings) in a simpler form. For the official subsidy, use the PM Surya Ghar national portal — note that new registrations closed on 6 June 2026, so the portal now serves people who applied earlier.

How accurate is the estimate?

It’s a solid planning estimate, but your tariff, roof, shading, sunlight and installer quotes vary. Get 3 free quotes to confirm your real numbers.

Sources: PM Surya Ghar / MNRE (pmsuryaghar.gov.in) · Electricity (Rights of Consumers) Rules, 2020

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These are planning estimates for 2026 — your actual system, tariff, sunlight and quotes will vary. Always confirm with an installer.