Rooftop solar · Tamil Nadu
Rooftop solar in Tamil Nadu: cost, subsidy & 25-year savings
Tamil Nadu homes on TANGEDCO pay ₹4.70–₹11.55/kWh (telescopic slabs). Rooftop solar cuts that bill and earns government subsidies*of up to ₹78,000. Here's what it costs, what you save, and how to compare installers — no salesperson, no signup.
Indicative for a Tamil Nadu home on a ₹3,000/month bill (~3.55 kW, 7 panels). Not a quote — run your own numbers.
Government subsidy in Tamil Nadu
On this sample, you'd qualify for about ₹78,000 in central rooftop-solar subsidy* — up to ₹78,000 for a 3 kW system, applied as ₹30,000 + ₹30,000 + ₹18,000 tiers across the first 3 kW.
TANGEDCO electricity tariff
Domestic Tamil Nadu homes pay ₹4.70–₹11.55/kWh (telescopic slabs). Solar offsets your most expensive units first, so the higher your bill, the faster it pays back.
View the latest TANGEDCO tariff orderRate last verified 2026-05-18from the regulator's order.
* Government subsidies can change. Review the latest regulations on the official government portal before committing to a rooftop solar installation.
The scheme is actively funded. PIB reports ₹9,281 crore disbursed across ~57.9 lakh applications as of 2025-07 (source ). Last verified 2026-05-20.
Rooftop solar in Tamil Nadu — FAQ
How much does rooftop solar cost in Tamil Nadu?
For a typical Tamil Nadu home on a ₹3,000/month TANGEDCO bill, a ~3.55 kW system costs about ₹1,95,263 before subsidy and ₹1,17,263 after. Your exact cost depends on your roof and installer — run the free estimate for figures based on your own home.
What government subsidy can I get in Tamil Nadu?
Indian homeowners can claim up to ₹78,000 from the central government's rooftop-solar scheme on a 3 kW system (tiered ₹30,000 + ₹30,000 + ₹18,000 across the first 3 kW). Subsidy amounts can change — always verify on the official portal before installing.
What is the TANGEDCO electricity tariff?
Tamil Nadu homes on TANGEDCO pay ₹4.70–₹11.55/kWh (telescopic slabs) (domestic LT). Solar offsets the highest-priced units first, which is why it pays back fastest for higher bills. Rate last verified 2026-05-18 from the regulator's tariff order.
What's the payback period on solar in Tamil Nadu?
On the sample above, payback is about 3.3 years, after which the system keeps generating for 20+ more years. Higher bills pay back faster.