3 kW solar system price in Tamil Nadu, with subsidy.
What a 3 kW rooftop system costs after the central and Tamil Nadu subsidies, what it generates and which homes it suits.
A 3 kW on-grid rooftop system with made-in-India panels costs about ₹1.8–2.2 lakh in Tamil Nadu before subsidy. After the ₹1,00,000 combined subsidy you pay roughly ₹1,00,100. It makes about 720 units per two-month bill.
- 3 kW
- With subsidy
- 720 units per bill
- Net metering
- Free site visit
3 kW solar price in Tamil Nadu (2026)
| Indicative | |
|---|---|
| Price before subsidy (DCR panels, on-grid, incl. GST) | ₹1.8–2.2 lakh |
| PM Surya Ghar central subsidy | ₹78,000 |
| Tamil Nadu top-up (registrations from 5 Aug 2026) | ₹22,000 |
| Total subsidy | ₹1,00,000 |
| You pay (midpoint) | ₹1,00,100 |
Indicative prices; your exact quote depends on roof, structure height and brands. Subsidy details: how the ₹1 lakh subsidy works.
What it generates and who it suits
- About 720 units per two-month bill (360 a month) on a shade-free roof.
- Suits homes using about 500–900 units per bill.
- Needs about 270–300 sq ft of shade-free roof.
- Comes with net metering through TNPDCL, so surplus units are credited.
Payback
For a home using about 720 units per bill, the bill falls from about ₹4,014 to about ₹0. Payback is roughly 4.2 years after subsidy, then about 20 more years of near-free power. Check with your own units in the TNEB bill calculator. Other sizes: 2 kW · 5 kW.
Why Goggles Energy
One engineering team from feasibility to O&M. A real engineer reviews every enquiry, sizes the system to your bill and handles the subsidy and TNPDCL (TANGEDCO) net metering. Offices in Nagercoil (HQ) and Chennai.
FAQ
What is the price of a 3 kW solar system in Tamil Nadu?
Indicatively ₹1.8–2.2 lakh before subsidy for an on-grid system with made-in-India panels, including GST. After the ₹1,00,000 subsidy (₹78,000 central + ₹22,000 Tamil Nadu) you pay roughly ₹1,00,100.
How many units does a 3 kW solar system generate?
About 720 units per two-month bill, or 360 a month, on a shade-free roof in Tamil Nadu.
Is 3 kW enough for my home?
It suits homes using about 500–900 units per bill. Send us your bill and we will size it exactly.