Chennai Solar Installation: What It Costs, How Long It Takes, Who Services It
A straight answer on rooftop solar Chennai pricing, the TANGEDCO net-metering timeline and what happens after commissioning — from an authorised Tata Solar dealer based in the city.
Most people searching for Chennai solar installation want three numbers: what it costs, how long it takes, and what happens when something breaks. This page answers those first and leaves the marketing for later.
Chennai gets roughly 5.8 hours of usable sunlight a day, so a kilowatt of well-placed rooftop capacity produces about 120 units a month across the year. That single figure drives every quote you will receive. If your TANGEDCO bill shows 350 units of monthly consumption, a 3 kW system will very nearly zero it — anything larger is being sold to you, not sized for you. The one exception is a household planning an EV or a second air conditioner within a couple of years, where a slightly larger array now saves a second structure job later.
Solar Panel Chennai Price by System Size
Indicative Chennai pricing for a grid-connected residential system with ALMM-listed modules, before and after the PM Surya Ghar central subsidy. Final cost depends on roof type, cable run and structure height.
| System size | Typical generation | Cost before subsidy | Approx. cost after subsidy |
|---|---|---|---|
| 2 kW | ~240 units/month | ₹1.5–1.7 lakh | ₹90,000–₹1.1 lakh |
| 3 kW | ~360 units/month | ₹2.1–2.3 lakh | ₹1.35–1.6 lakh |
| 5 kW | ~600 units/month | ₹3.2–3.6 lakh | ₹2.4–2.8 lakh |
| 10 kW | ~1,200 units/month | ₹6–7 lakh | ₹5.2–6.2 lakh |
Subsidy applies to eligible residential grid-connected systems with ALMM-listed modules. Commercial and industrial rooftops are not subsidy-eligible but claim accelerated depreciation instead.
The Chennai Installation Timeline, Honestly
Days 1–3
Free site survey, shadow study, roof structure check and an itemised written quote.
Week 1–2
PM Surya Ghar application filed on the national portal; TANGEDCO net-metering application submitted.
Installation day
Structure, panels, cabling, earthing, lightning arrest and inverter — one working day for a typical home system.
Week 3–5
TANGEDCO bi-directional meter fitted, system commissioned, monitoring app handed over, warranty registered.
The part nobody controls is the DISCOM queue. Net-meter fitting can take two weeks in some Chennai sections and four in others, and any installer who promises a fixed date for it is guessing. What we do control is that the application is complete and correct the first time — a rejected file for a missing structural detail or a non-ALMM module is the single most common reason a Chennai rooftop sits idle for a month.
What Service Looks Like After Commissioning
A rooftop system in Chennai needs less attention than people expect and more than zero. Dust and construction grit cut output by 5–8% within a few months, so panels want washing every six to eight weeks in the dry season. Coastal salt in Besant Nagar, Thiruvanmiyur and Kelambakkam is harder on mounting hardware than on the modules — that is why we specify extra corrosion treatment on structures within a few kilometres of the sea. Inverters are the component that actually fails, usually somewhere between year six and year ten.
Our workmanship warranty runs five years on structure, cabling, earthing and commissioning, alongside the manufacturer's 25-year panel performance warranty. We also take fault calls and annual maintenance contracts on systems other companies installed, which is often how people find us in the first place — the original installer stopped answering the phone. Choosing the best solar company in Chennai really comes down to who is still trading in year eight.
Chennai Areas We Install In
Home solar Chennai crews work across the whole city, with same-week site surveys in these neighbourhoods.
Chennai Solar Installation FAQ
Get a Chennai Rooftop Quote
Send your last TANGEDCO bill amount and we will come back with a sized system, a price and the subsidy you qualify for.
Helpful Resources
On Gensolar
- Solar Panel Installation in ChennaiFull overview of rooftop solar across the city.
- Solar Installation Cost in ChennaiDetailed pricing breakdown by system size.
- Authorised Tata Solar Dealer ChennaiGenuine Tata modules, warranty registered by us.
- PM Surya Ghar SubsidyHow the central subsidy is calculated and claimed.
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.





















































































































