10kW Solar Panel Price in Chennai

A 10 kW rooftop system generates around 17,300 units a year, covering a very large home, an apartment building's common areas, or a small factory, shop or clinic.

Very large homes

Heavy air conditioning, an EV, a pool pump or a borewell.

Apartment associations

Covering the common-area load of a mid to large building.

Small factories and warehouses

Particularly in Ambattur, Sriperumbudur and along the GST Road corridor.

Commercial premises

Clinics, diagnostic centres, restaurants, showrooms, schools and offices.

Any property consuming under about 13,000 units a year. Below that, a large share of generation is exported rather than consumed, and exported units return less than self-consumed ones. Size against twelve months of bills, not against roof capacity, an 8 kW system is often the better answer.

The subsidy

How much subsidy do you get on a 10kW solar system?

An individual household installing a 10 kW system in Chennai receives ₹78,000 under the PM Surya Ghar Muft Bijli Yojana, the same amount paid on a 3 kW system, and 10 kW is the largest residential system eligible for any Central Financial Assistance. Housing societies claiming for common facilities receive ₹18,000 per kW instead, which at 10 kW comes to ₹1,80,000. Commercial installations receive no subsidy but can claim accelerated depreciation of up to 40% in year one.

Worth seeing plainly

At 10 kW the household subsidy is at its least efficient, ₹7,800 per kW against ₹26,000 per kW at 3 kW. That is not an argument against 10 kW for a household that genuinely consumes 17,300 units a year, where the absolute savings dwarf anything a smaller system delivers. It is an argument against installing 10 kW because the roof allows it. See the full subsidy process.

An individual household

Severely

Why a household should treat it as a hard stop

The subsidy is a one-off, and above 10 kW it is gone entirely: ₹78,000 a household does not get back. The extra approvals stay with the system: CEIG inspection and a separate generation meter. Net metering itself continues up to your sanctioned load, so an exported unit is still credited against a unit you later import.

Crossing the line is not a linear step. The eleventh kilowatt does not just forfeit subsidy on itself, it changes how every exported unit is treated for the life of the system.

Why a housing society is not constrained

The common-area provision pays ₹18,000 per kW up to 500 kW, subject to 3 kW per residential unit and inclusive of individual systems residents have already installed. A 40-flat building has headroom well beyond 10 kW at the same per-kW rate.

An association sized correctly for its lifts, pumps, STP and lighting should not be capped at 10 kW because someone applied a household rule to it. See solar for apartments and housing societies.

Why a business is barely affected

Commercial buyers receive no subsidy either side of 10 kW, so nothing is lost there. And commercial consumption is concentrated in daylight hours, matching generation, so a correctly sized business system exports very little.

When almost everything is self-consumed, the net metering versus net feed-in distinction has limited practical effect. More on how TANGEDCO net metering works.

Array layout

Seventeen to nineteen panels almost never fit on one clean roof plane. Expect the array to split across sections, orientations or levels, which makes MPPT configuration a genuine engineering decision rather than a formality. Multiple inputs let each section perform independently instead of the weakest string limiting the rest.

Structure design

At this array size the wind loading on the mounting system is substantial, and Chennai sits in a 50 m/s basic wind speed zone with a cyclone factor applied within 60 km of the coast. Ask what the structure is designed to and who certified it. On a 10 kW array this is a structural question, not a procurement one.

Why businesses frequently under-size

Many commercial buyers install 10 kW because that is the number they heard, when their load supports considerably more. The residential ceiling does not apply to them. Above 10 kW the DISCOM assesses distribution transformer capacity and the approval route is longer, but the economics generally continue to improve with scale, because fixed costs spread and per-kW installation cost falls.

If your business consumes well above 17,300 units a year, sizing at 10 kW leaves money on the table every day for 25 years.

Savings

What a 10kW system saves in Chennai

A 10 kW system generating around 17,300 units a year covers a very large Chennai home, a mid to large apartment building's common areas, or a small commercial premises. Residential and society payback typically runs four to six years, and commercial three to four, on panels warranted to perform for 25 years.

Why commercial payback is faster despite no subsidy

Commercial tariffs are higher than domestic, so each generated unit displaces a more expensive one. Consumption sits between roughly 9am and 7pm, matching generation almost exactly, so nearly everything is self-consumed at full value rather than exported. And accelerated depreciation delivers a tax benefit in year one rather than spread across the asset's life.

A 10 kW system generates enough that export is inevitable unless consumption genuinely matches it. Self-consumed units are worth full retail value. Exported units are credited under net metering, but any credit still unused on 31 March lapses unpaid.

This is why we size against twelve months of actual bills, and why we will recommend 8 kW, or 6 kW, when the consumption says so.