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Know Your Solar Savings.

One minute. Real Chennai tariffs. Real solar economics. No spam.

Solar panels converting sunlight into savings
Know Your Solar Savings

Get your solar number in 60 seconds

Enter a few details — we'll size your system, estimate savings, and give you a realistic payback period for Chennai.

Basic Details

Electricity Details

Roof Details

Usage Pattern

How we calculate this

Units: Monthly Bill ÷ Tariff, plus your appliance load (e.g., ₹5,000 ÷ ₹8 = 625 units). A bi-monthly bill is halved to a monthly figure.
Required kW: Monthly Units ÷ 120 (TN average yield)
Savings: Daytime usage at full tariff + night export at ₹2.5/unit
Payback: Net cost (after subsidy) ÷ Annual Savings (~5–6 years typical)
25-yr savings: Annual savings compounded at 2% tariff escalation
Investment: ₹55,000–60,000 per kW (Chennai market rate, 2026)
PM Surya Ghar subsidy: Homes & apartments get ₹30k/₹60k/₹78k for 1/2/3 kW, capped at ₹78,000 — deducted to show your net cost.

Estimates use Chennai-region average irradiance (4.5 kWh/m²/day) and TANGEDCO tariff structures. Your final number may differ by ±10% based on shading, roof orientation, and panel choice.

PM Surya Ghar Muft Bijli Yojana

Government solar subsidy — made simple

Put solar on your roof and the Government of India pays part of the cost. The bigger your system (up to 3 kW), the bigger the subsidy.

1 kW rooftop solar

₹30,000

Maximum subsidy

2 kW rooftop solar

₹60,000

Maximum subsidy

3 kW rooftop solar

₹78,000

Maximum subsidy

The subsidy is capped at ₹78,000 — it does not increase even if your system is bigger than 3 kW.
Example: install a 3 kW rooftop system and you get ₹78,000 back from the government.

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