Solar Installation Cost in Chennai (2026 Price Guide)
Transparent, installed prices by system size — before and after the PM Surya Ghar subsidy of up to ₹78,000.
Solar installation in Chennai begins with a ₹19,999 down payment, and a 3 kW rooftop system typically ranges from ₹1,90,000 to ₹2,30,000 — an effective cost of about ₹1,02,000 once the ₹78,000 PM Surya Ghar subsidy is credited to your bank account after installation.
The range depends on the panels you choose and whether the system is shed-mounted or needs an elevated erection structure. After installation you pay the balance in full or on EMI. These are fully installed prices from GenSolar Energy, an authorised Tata Solar dealer and solar installation company in Chennai. The figure covers panels, inverter, mounting structure, cabling, earthing, TANGEDCO net-metering coordination and commissioning — not just hardware. Prices vary a little with panel brand, roof type and cable runs, which is why we always survey before quoting.
GenSolar Energy is an authorised Tata Solar dealer and rooftop solar installation company serving Chennai, Tiruvallur, Kancheepuram, Vellore, Chengalpattu and Viluppuram, with 500+ installations, MNRE approval and a 25-year warranty.
Solar panel installation cost in Chennai by system size
Indicative installed prices for on-grid residential rooftop systems in Chennai, 2026.
| System size | Generation | Cost before subsidy | PM Surya Ghar subsidy | Your net cost | Best for |
|---|---|---|---|---|---|
| 1 kW | ~120 units/mo | ₹75,000–₹90,000 | − ₹30,000 | ~₹50,000 | Small homes, 1–2 ACs off-peak |
| 2 kW | ~240 units/mo | ₹1,35,000–₹1,60,000 | − ₹60,000 | ~₹80,000 | 2 BHK flats & independent homes |
| 3 kW | ~360 units/mo | ₹1,90,000–₹2,30,000 | − ₹78,000 | ~₹1,02,000 | Most Chennai households — best value |
| 5 kW | ~600 units/mo | ₹2,90,000–₹3,40,000 | − ₹78,000 | ~₹2,32,000 | Villas, 3+ ACs, borewell pump |
| 10 kW | ~1,200 units/mo | ₹5,50,000–₹6,20,000 | − ₹78,000 | ~₹4,92,000 | Large villas & small commercial |
Subsidy slabs: ₹30,000 for 1 kW, ₹60,000 for 2 kW and ₹78,000 for 3 kW and above (capped — any system of 3 kW or more receives the same ₹78,000). It is credited by the central government directly to your bank account after installation. Commercial systems are not subsidy-eligible but claim 40% accelerated depreciation.
What affects your solar cost in Chennai
Panel brand and technology
Tata Power Solar and other Tier-1 TOPCon modules cost ₹2–₹4 more per watt than entry-level mono PERC, but generate more per square foot and hold warranty value.
Roof type and structure
A flat RCC terrace is the cheapest. Sloped tile roofs, sheet roofs and elevated structures over water tanks add mounting steel and labour.
Inverter choice
String inverters suit most Chennai homes. Micro-inverters or optimisers cost more but recover output on partially shaded roofs.
Battery backup
On-grid is cheapest. Adding a lithium battery for load-shedding areas like Avadi or Tiruvallur adds ₹45,000–₹1,20,000.
Cable runs and earthing
If your meter room is far from the terrace, DC/AC cabling, conduit and lightning arrestor costs rise.
Subsidy eligibility
Residential TANGEDCO consumers with 1–10 kW qualify for PM Surya Ghar. Rented roofs and commercial connections do not.
EMI: pay from your bill savings
You can start a Chennai rooftop solar installation with a ₹19,999 down payment and move the balance to EMI over 3, 5 or 7 years through our HDFC, SBI and Bajaj Finserv tie-ups. On a 3 kW system the EMI is usually close to what you were already paying TANGEDCO — so your monthly outflow barely changes, and after the tenure your electricity is effectively free.
- From ₹19,999 down payment
- 3 / 5 / 7-year tenures
- ₹78,000 subsidy credited to your bank account after installation
- No pre-closure penalty on most partners
Payback in Chennai
At current TANGEDCO slab rates, a 3 kW system in Chennai at an effective cost of about ₹1,02,000 pays for itself in roughly 4–5 years and keeps generating for 25 years — about ₹12–₹15 lakh of avoided electricity cost over its life.
Calculate your own solar cost & savings
Enter your TANGEDCO bill for a system size, subsidy and payback estimate — or open the full solar savings calculator.
See your savings in 30 seconds
Based on TANGEDCO ₹8/unit average tariff & PM Surya Ghar subsidy slabs.
20.6% (mono PERC) · 25 yr performance / 10 yr product
Note: TANGEDCO issues bills every 2 months — enter your full bill amount above if using bi-monthly mode.
Indicative estimates based on 6% annual TNEB tariff escalation and ~90% solar offset. Actual savings vary by usage, tariffs, and installation. EMI at 6% p.a. reducing balance over 48 months; bank rates may vary. PM Surya Ghar subsidy up to ₹78,000 (≥3 kW) is credited within 7–30 days and adjusted against your loan. Total system cost ₹1.9L–₹2.3L depending on panel and mounting.
Solar installation cost in Chennai — FAQs
Plan your Chennai solar installation
On Gensolar
Official Government Sources
- PM Surya Ghar: Muft Bijli YojanaCentral rooftop solar subsidy scheme — apply & track subsidy.
- Ministry of New & Renewable Energy (MNRE)Government of India nodal ministry for solar policy.
- TANGEDCO (TNEB)Tamil Nadu Generation & Distribution Corp — net metering & tariffs.
- PM-KUSUM SchemeSolar pump subsidy scheme for farmers (up to 60%).
- National Portal for Rooftop SolarCentral registration & DISCOM coordination portal.
- Bureau of Energy Efficiency (BEE)Energy efficiency standards and labelling authority.
