Rooftop Solar in Tamil Nadu
Tamil Nadu has 280+ sunny days, high electricity tariffs, and TANGEDCO net metering — making it among the best states for rooftop solar in India. Claim ₹78,000 subsidy and pay back in under 4 years.
Why Tamil Nadu is India's Best State for Rooftop Solar
Three factors make Tamil Nadu uniquely strong for residential and commercial solar:
High Solar Irradiation
Tamil Nadu receives 5.5-6 hours of peak sun daily — among India's highest. A 1kW system generates ~1,500-1,650 units/year, vs ~1,200 in Delhi or Mumbai.
High Grid Electricity Cost
TANGEDCO residential tariffs cross ₹6/unit above 500 units. Solar saves you the highest slab first — making payback faster than low-tariff states like Punjab or Bihar.
Active Net Metering
TANGEDCO offers true net metering (kWh credits, not just monetary) for residential up to 10kW. Surplus generation in summer carries forward to monsoon months.
PM-Surya Ghar Subsidy in Tamil Nadu — Complete Breakdown
The central PM-Surya Ghar Yojana is open to all Tamil Nadu residents with their own roof. Subsidies are pre-approved before installation.
| System Size | Subsidy Amount | Typical Cost | Net Cost After Subsidy |
|---|---|---|---|
| 1 kW | ₹30,000 | ₹65,000 | ₹35,000 |
| 2 kW | ₹60,000 | ₹1,30,000 | ₹70,000 |
| 3 kW (Best Value) | ₹78,000 | ₹1,90,000 | ₹1,12,000 |
| 5 kW | ₹78,000 (capped) | ₹3,15,000 | ₹2,37,000 |
| 10 kW (Commercial) | Sec 32 Depreciation | ₹6,00,000 | ~₹4,20,000 effective (post-tax shield) |
How to Apply for PM-Surya Ghar in Tamil Nadu
- Register at pmsuryaghar.gov.in — provide your TANGEDCO consumer number, system size, mobile, email.
- Get pre-approval — system processes in 2-7 days, you receive a feasibility report and subsidy estimate.
- Choose a registered vendor — must be enlisted on PM-Surya Ghar portal. Darling Solar and other verified TN vendors are pre-listed.
- Sign installation contract — vendor handles design, TANGEDCO DISCOM application, structural drawings.
- TANGEDCO inspection — typically within 7-15 days of application. Approval gives you the green light to install.
- Installation — physical installation takes 3-7 days for a 3kW residential system.
- Net meter installation — TANGEDCO replaces your standard meter with a bi-directional net meter (free).
- Subsidy disbursement — ₹78,000 credited directly to your bank account within 30-45 days of commissioning.
Darling Solar — Trusted Across Tamil Nadu
Get a free quote from Tamil Nadu's verified solar partner. Darling Solar handles PM-Surya Ghar paperwork end-to-end, offers 5-year free AMC, and uses Tier-1 panels with 25-year warranty.
- Serves Chennai, Madurai, Coimbatore, Trichy, Salem & all TN cities
- Tier-1 panels (Adani, Vikram, Waaree) with 25-year warranty
- 5-year free AMC included
- End-to-end PM-Surya Ghar subsidy paperwork
- 4.8/5 rating from 200+ TN customers
Solar Dealers Across Tamil Nadu Cities
Browse verified solar installers in your city. Each city page shows multiple dealers with ratings, addresses, and contact info.
TANGEDCO Net Metering — Tamil Nadu's Solar Advantage
Tamil Nadu's net metering policy under TANGEDCO is one of India's most favorable:
- Eligibility: Any residential, commercial, or industrial consumer with own roof and TANGEDCO connection
- System size cap: Up to 10 kW for residential, up to 1 MW for commercial
- Credit type: kWh-based net metering (not just monetary) — your meter literally runs backwards when exporting
- Carry forward: Excess generation in summer carries to monsoon months — settled annually
- Settlement: Annual settlement at retail tariff for residential (better than other states which pay only feed-in tariff)
- Application: Apply via TANGEDCO portal during PM-Surya Ghar process — single integrated workflow
Real example: A 3 kW system in Chennai generates ~4,200 units/year. A typical 4-BHK household uses ~3,500 units. The surplus 700 units becomes a credit, offsetting your monsoon-season higher consumption. Net annual electricity bill: often ₹0 or under ₹500.
Charge Your EV with Free Solar Power
Tamil Nadu offers 0% road tax + 100% Green Tax exemption for EVs. Pair your rooftop solar with an EV and you get effectively zero-fuel daily driving for life. The combined ₹78K solar + ₹2.35L EV savings stack into a powerful financial case.
Frequently Asked Questions — Solar in Tamil Nadu
How much subsidy can I get for rooftop solar in Tamil Nadu?
Tamil Nadu residents can claim up to ₹78,000 central subsidy under PM-Surya Ghar Yojana for residential rooftop solar (up to 3kW). Tamil Nadu does not currently offer a state-level top-up subsidy, but TANGEDCO net metering credits make solar highly profitable.
Is net metering available in Tamil Nadu?
Yes. TANGEDCO provides net metering for residential systems up to 10 kW. Excess generation is credited at retail tariff for residential and at agreed PPA rate for commercial.
What is the cost of a 3kW solar system in Tamil Nadu?
A 3kW grid-connected residential solar system costs ₹1.8L–₹2.4L installed. After ₹78,000 PM-Surya Ghar subsidy, your net cost is ₹1L–₹1.6L. Payback period: 3.5-4.5 years.
Why is Tamil Nadu particularly good for solar?
Tamil Nadu has 280-320 sunny days per year and 5.5 hours of average peak sun. Combined with high TANGEDCO tariffs, payback is faster than in cloudy/cheap-electricity states.
Can MSMEs claim Section 32 depreciation on solar in Tamil Nadu?
Yes. Under Section 32 of the Income Tax Act, businesses can claim 40% accelerated depreciation on solar PV systems in the first year. For a ₹50L industrial solar plant, this means ₹6L tax saving in year 1.
How long does it take to install rooftop solar in Tamil Nadu?
Typical timeline: 45-60 days end-to-end. Site survey 3 days, design + DISCOM 12 days, TANGEDCO approval 15 days, installation 15 days, net meter 15 days. Faster with experienced dealers.
Which is the best solar dealer in Tamil Nadu?
Darling Solar (verified partner) is one of TN's highest-rated solar installers. They handle PM-Surya Ghar paperwork end-to-end, offer 5-year free AMC, and use Tier-1 panels. Get a free quote via the form on this page.