3 kW Solar System Price in Tamil Nadu (2026), With Subsidy
A 3 kW rooftop solar system in Tamil Nadu costs roughly ₹1.65–2.25 lakh before subsidy. With the central PM Surya Ghar subsidy (₹78,000) the cost after subsidy is roughly ₹87,000–₹1.47 lakh. We could not verify a generally availableTamil Nadu state cash top-up, so none is included (see the note below). Indicative ranges to check a quote against, not a quote.
Indicative installed cost
₹1.65–2.25 lakh
Central subsidy
₹78,000
Cost after subsidy
₹87,000–₹1.47 lakh
Announced: Tamil Nadu rooftop solar state top-up (August 2026) — launch details not yet published
Tamil Nadu’s Revised Budget 2026-27, presented on 6 August 2026, announced a Rooftop Solar Subsidy Scheme to run in convergence with PM Surya Ghar, giving domestic consumers up to ₹1 lakh in total — the state adding ₹22,000 to the central ₹78,000 for a 3 kW system — with ₹50 crore earmarked (one report adds a target of 1 lakh consumers by March 2027). Some reports give a tiered state amount of ₹5,000 for 1 kW, ₹10,000 for 2 kW and ₹22,000 for 3 kW and above; others mention only the 3 kW figure, and where the bands start and end differs between reports. We found no launch date, government order or application process, and one report that TEDA would process it automatically after the central subsidy is unconfirmed. So the amount is not added to any total here; the price pages show it as a separate "if launched as reported" scenario. Confirm the status with TEDA or TNPDCL before relying on it.
Checked October 2026 (moderate confidence). Sources: DT Next — TN Budget 2026 · Energetica India · Saur Energy (tier amounts) · Deccan Chronicle, 15 Aug 2026
If the announced Tamil Nadu top-up is launched as reported
Domestic consumers installing rooftop solar under PM Surya Ghar. Reported tiers: ₹5,000 for 1 kW, ₹10,000 for 2 kW, ₹22,000 for 3 kW and above.
| Case | Total subsidy | Cost after subsidy |
|---|---|---|
| Reported tier: 3 kW and above | ₹1,00,000₹78,000 central + ₹22,000 state | ₹65,000 – ₹1,25,000 |
A scenario, not our headline figure: it applies only if you meet the conditions and the scheme works as reported (moderate confidence). The headline numbers on this page use the central subsidy alone.
PM Surya Ghar subsidy window: 31 March 2027
The ₹78,000 central residential subsidy is sanctioned through the end of FY 2026-27 (31 March 2027). Apply and get commissioned well before this date. No extension has been officially notified; MNRE has indicated the one-crore-household target may fall short by March 2027, which makes an extension plausible but not assured — plan around the published date.
As of October 2026 — confirm the current position on pmsuryaghar.gov.in.
How the Subsidy Works for 3 kW in Tamil Nadu
- Central: ₹78,000 under PM Surya Ghar — the same everywhere in India.
- Tamil Nadu: Tamil Nadu has no generally available state cash top-up that we could verify, so the central subsidy is the only amount used in the headline figures.
- Compared with the India guide: the subsidy and cost after subsidy are the same as the 3 kW India price guide. What differs in Tamil Nadu is how much the system generates, and so the payback below.
What You Pay and How Fast It Pays Back
A 3 kW system in Tamil Nadu (about 5.3 peak sun hours) generates around 4,527 units a year. Payback below is the cost after the central and state subsidy divided by the yearly bill saving, from the low to the high end of the cost band.
| Your rate | Yearly saving | Payback |
|---|---|---|
| ₹6 per unit | ₹27,160 | 3.2 – 5.4 years |
| ₹8 per unit | ₹36,214 | 2.4 – 4.1 years |
| ₹10 per unit | ₹45,267 | 1.9 – 3.2 years |
Net metering in Tamil Nadu: Net metering tiers: up to 10 kW residential, 500 kW LT commercial, 1 MW HT (moderate confidence, checked October 2026). Surplus is generally bought below the retail tariff, so these paybacks assume you use most of what you generate. See the Tamil Nadu subsidy page for the details.
How to Claim in Tamil Nadu
- Register on the national portal (pmsuryaghar.gov.in) with TNPDCL (formerly TANGEDCO) and your consumer number, and choose an installer empanelled with the DISCOM.
- Ask for the DCR certificate for the exact module model, because the central subsidy needs domestically manufactured modules.
- The announced state top-up has no published launch date or application process as of our check. Ask TEDA or TNPDCL whether it has started, and whether you need to apply separately, before you assume it applies.
- After commissioning and inspection the central subsidy is paid to your bank account by direct benefit transfer.
Process as reported and checked October 2026; portals and rules change, so confirm each step with the official portal. State nodal agency: TEDA (Tamil Nadu Energy Development Agency).
What Your Quote Should Include
- Module make, model and wattage — and written confirmation of ALMM listing and DCR status for that exact model, because the subsidy needs domestically manufactured modules.
- Inverter make, rating and warranty term, and whether arc-fault (AFCI) protection is included and switched on.
- Mounting structure: steel grade, thickness, galvanising, and the wind speed it is designed for.
- DC and AC cable sizes, earthing and lightning protection, and surge protection — the items that get cut when a quote is cheap.
- Net meter, DISCOM approval and inspection charges, and whether the installer handles the subsidy paperwork.
- Who services the system, for how long, and what the warranty covers in writing.
More in how to read a solar quotation.
Run It With Your Own Electricity Rate
The calculator is pre-set for Tamil Nadu and 3 kW.
Open the subsidy calculatorFrequently Asked Questions
What is the price of a 3 kW solar system in Tamil Nadu with subsidy?
Using our indicative cost band, a 3 kW residential system costs roughly ₹1.65–2.25 lakh before subsidy. With the ₹78,000 central subsidy, the cost after subsidy is roughly ₹87,000–₹1.47 lakh; we have not added any Tamil Nadu state amount because we could not verify one. Quotes vary with brand, structure and roof, so compare at least three written quotes.
How much subsidy does a 3 kW system get in Tamil Nadu?
₹78,000 from the central scheme. Tamil Nadu has no generally available state cash top-up that we could verify, so the central subsidy is the only amount used in the headline figures. As of October 2026, the central scheme runs to 31 March 2027.
How much is the Tamil Nadu rooftop solar state subsidy?
Tamil Nadu announced a state top-up in its Revised Budget 2026-27 (6 August 2026), reported as up to ₹1 lakh in total with the central subsidy, meaning ₹22,000 from the state for a 3 kW system, with ₹50 crore set aside. Some reports give ₹5,000 for 1 kW and ₹10,000 for 2 kW. We found no launch date or application process, so it is not in our totals; see the scenario box above and check with TEDA or TNPDCL.
How many units will a 3 kW system generate in Tamil Nadu?
About 4,527 units a year (roughly 377 a month), using 5.3 peak sun hours for Tamil Nadu and a 78% performance ratio. Shading, orientation and cleaning change the real figure.
Which DISCOMs handle rooftop solar in Tamil Nadu?
TNPDCL (TANGEDCO). Applications go through the national PM Surya Ghar portal, which routes them to your DISCOM for feasibility approval and net metering.
Other Sizes in Tamil Nadu
Same size elsewhere: 3 kW in Delhi · 3 kW in Uttar Pradesh · 3 kW in Gujarat · 3 kW in Rajasthan · 3 kW in Maharashtra · 3 kW in Bihar · 3 kW across India.
Cost bands: HUM India Solar Databook, updated July 2026 — indicative market observation, not a survey. Subsidy facts as of October 2026; state schemes change often, so confirm on the official portal before paying. HUM is vendor-neutral: no installer or manufacturer pays to appear, and nothing here is a quote.
Found this useful? Send it to someone planning solar.