Solar Energy in Tamil Nadu: Complete 2026 State Guide
Tamil Nadu processed 1.8 lakh rooftop solar applications in FY 2025–26 — second highest in India. TANGEDCO handles the entire state, making it simpler than states with multiple DISCOMs.
Solar Potential in Tamil Nadu
Tamil Nadu receives approximately 5.4 peak sun hours per day on average. A 3 kW rooftop solar system in Tamil Nadu generates approximately 5,026 units per year and can save ₹2,685/month on your electricity bill at the current TANGEDCO tariff of ₹6.50/unit.
Estimated payback period: ~3.2 years after PM Surya Ghar subsidy. After payback, you get 20+ years of virtually free electricity.
PM Surya Ghar Subsidy in Tamil Nadu (2026)
Residents of Tamil Nadu are fully eligible for the central PM Surya Ghar Muft Bijli Yojana:
- Up to 2 kW: ₹30,000/kW (total ₹60,000)
- 2–3 kW: ₹18,000/kW for the extra capacity (total ₹78,000 for 3 kW)
- Above 3 kW: No additional central subsidy, but net metering still applies
State subsidy: Tamil Nadu offers ₹20,000/kW (up to 3 kW) additional state subsidy for BPL households via TEDA. General consumers receive central PM Surya Ghar only.
Your DISCOM & Net Metering in Tamil Nadu
Electricity distribution and solar net metering in Tamil Nadu is handled by TANGEDCO (Tamil Nadu Generation and Distribution Corporation) — entire state.
- Net metering limit: 1 MW
- Application portal: tangedco.gov.in / teda.in
- Solar target for Tamil Nadu: 20 GW solar by 2030 under TN Green Energy Policy
How to Apply for Solar in Tamil Nadu
- Register at pmsuryaghar.gov.in with your Aadhaar and consumer number
- Select your DISCOM (TANGEDCO) in the portal
- Choose an MNRE-empanelled installer from the portal's vendor list
- Get the system installed (typically 2–4 days for 1–5 kW)
- Submit commissioning certificate to TANGEDCO for net meter installation
- Subsidy credited to your bank account within 30 days of net meter commissioning
Why Go Solar in Tamil Nadu in 2026?
- 💰 Save ₹2,685/month on your electricity bill
- 🏛️ PM Surya Ghar subsidy up to ₹78,000 — no repayment needed
- ⚡ Net metering — export surplus solar to grid for credits
- 📈 Property value increases 3–5% with solar installation
- 🌿 Reduce CO₂ by ~1.5 tonnes/year per kW installed
- 🔧 25-year warranty on quality solar panels (Waaree, Adani, Tata, Vikram)
See city-specific guides for Tamil Nadu: Chennai, Coimbatore, Madurai, Salem
Use our Solar Cost Calculator and ROI Calculator to get personalised estimates for your home in Tamil Nadu.