Blog · State Policy
Solar Energy in Tamil Nadu: Complete Guide 2026
TN Solar Policy, MNRE subsidy, TANGEDCO net metering, and why Tamil Nadu leads India in solar adoption.
Why Tamil Nadu is India's Solar Leader
Tamil Nadu ranks #1 in rooftop solar installations and #3 in total solar capacity (7500+ MW) in India. With 300+ sunny days, progressive policies, and strong TANGEDCO support, TN offers the best environment for solar adoption.
- 7500+ MW installed solar capacity (as of 2026)
- 300+ sunny days annually with 5-6 peak sun hours
- Strong state subsidy + MNRE subsidy (up to ₹78k)
- Seamless TANGEDCO net metering process
- High electricity tariffs (₹4-8/unit) = faster ROI
Tamil Nadu Solar Policy Highlights
- Net Metering: Up to 1MW for residential/commercial (TANGEDCO Regulation 2019)
- Banking Credits: Surplus power credits valid for 12 months
- Wheeling Charges: Exempted for captive consumption
- Single-Window Clearance: Simplified approval through TEDA
- Land Allocation: Government land available for solar parks
Solar System Costs in Tamil Nadu
| Capacity | Cost | With Subsidy | Payback |
|---|---|---|---|
| 1kW | ₹60k-70k | ₹42k-52k | 3-4 years |
| 3kW | ₹1.8L-2.1L | ₹1.25L-1.55L | 4-5 years |
| 5kW | ₹2.75L-3.25L | ₹2L-2.5L | 4-5 years |
| 10kW | ₹5L-6L | ₹4.2L-5.2L | 5-6 years |