10kW Solar System for Business: Price, ROI and Payback

For a shop, clinic, school, office or small workshop in India, electricity is one of the few costs that goes up almost every year. Commercial tariffs already run at about ₹8 to ₹11 per unit in most states, roughly double what homes pay. That makes rooftop solar a better investment for a business than for a household, even though businesses get no subsidy.

A 10kW system is where most small businesses start. It is big enough to cut a ₹12,000 to ₹15,000 monthly bill substantially, and small enough to fit on a typical commercial roof and a single three-phase connection.

This guide covers the solar 10kW system price for businesses in 2026, what you pay for, how many units it produces, the tax benefits, and a worked calculation of ROI and payback. It also explains the 2026 rule changes that affect which panels you can use with net metering.

10kW solar system price in 2026

A complete 10kW on-grid system for a business costs roughly ₹5,00,000 to ₹6,50,000 installed in 2026, or about ₹50,000 to ₹65,000 per kW.

That per-kW rate is lower than for small home systems, because fixed costs such as the site survey, approvals and crew visits are spread over more capacity. For comparison, a 3kW home system works out to about ₹60,000 to ₹70,000 per kW. Our solar panel price guide compares prices across system sizes.

Three things push a quote toward the top of the range:

1. Roof type

A raised structure on a flat RCC roof costs more than rails on a metal sheet roof. Elevated structures that leave parking or working space below cost more again.

2. Module type

N-Type TOPCon modules cost a little more per watt than Mono PERC. For net-metered systems, modules made with Indian cells are now required (see below), which also costs more.

3. Distance and access

Long cable runs from the roof to the meter, and difficult roof access adds labour and material.

What is in the price of 10kW solar system

Component	Indicative cost (10kW)	Notes
Solar panels (about 10.2kWp)	₹2,90,000 to ₹3,50,000	16 x 635W or 17 x 600W N-Type TOPCon
On-grid inverter (10kW, three-phase)	₹60,000 to ₹80,000	Check its input current rating against the panels
Mounting structure	₹55,000 to ₹80,000	Hot-dip galvanised or aluminium, designed for local wind load
Cabling, earthing, protection	₹45,000 to ₹70,000	DC and AC cables, SPDs, ACDB and DCDB, lightning arrester
Installation, net metering, approvals	₹50,000 to ₹70,000	DISCOM fees and timelines vary by state
Total installed	₹5,00,000 to ₹6,50,000

GST on solar modules and inverters fell from 12% to 5% in September 2025. On a turnkey solar contract, GST is typically applied at 5% on 70% of the value (treated as goods) and 18% on 30% (treated as services). That works out to an effective rate of about 8.9%, down from about 13.8% before the cut. Registered businesses may be able to claim input tax credit, depending on how the system is used. Ask your CA.

For a line-by-line view of what installers charge, see our solar panel installation cost breakdown.

Why businesses get no subsidy on solar panel system

PM Surya Ghar Muft Bijli Yojana is only for residential homes. There is no central subsidy for commercial or industrial rooftops. The only exception close to this is housing societies, which can claim ₹18,000 per kW for common areas.

Businesses have three advantages instead:

1. A higher tariff to replace

Every unit a business produces saves ₹8 to ₹11, compared with ₹5 to ₹8 for a home. The same system pays back faster.

2. Accelerated depreciation

Solar power systems qualify for depreciation at 40% of written-down value in the first year. On a ₹6 lakh system, that is a ₹2.4 lakh deduction in year one, worth about ₹60,000 in tax for a company at the 25.17% rate. If the system is commissioned late in the year and used for less than 180 days, only half the rate applies that year. The Income-tax Act, 2025 replaced the old Act from 1 April 2026, so confirm the current schedule with your CA.

3. Daytime use

Most businesses run during sunlight hours, so they use solar power as it is produced instead of exporting it at a low rate.

How many units does 10kW produce?

A 10kW system in India produces about 40 to 45 units a day as a yearly average. That is roughly 1,200 to 1,350 units a month, or 14,000 to 16,000 units a year.

Season	Daily output	Monthly output
Summer (March to May)	45 to 50 units	1,350 to 1,500 units
Winter (October to February)	40 to 45 units	1,200 to 1,350 units
Monsoon (June to September)	30 to 35 units	900 to 1,050 units

Rajasthan and Gujarat sit at the top of these ranges. Coastal and north-eastern states sit lower. N-Type TOPCon panels hold output better in heat and in weak monsoon light, which lifts yearly generation by a few percent. Our TOPCon vs PERC comparison explains why.

ROI and payback: a worked example

Here is a realistic case: a small business paying ₹9 per unit, with a ₹6 lakh system.

Assumption	Value
Installed cost	₹6,00,000
Year-one generation	15,000 units, falling 0.4% a year
Tariff saved	₹9 per unit, rising 2% a year
O&M (cleaning, checks)	₹6,000 a year, rising 5% a year
Inverter replacement	₹80,000 in year 12

Results:

• Year-one saving: about ₹1,34,000
• Simple payback: about 4 to 5 years
• Return before tax: about 22% a year (IRR over 25 years)
• Return after tax, including accelerated depreciation: about 20% a year
• Total savings over 25 years: well over ₹35 lakh in avoided electricity bills

Depreciation does not change the long-run return much, but it brings cash back faster: about ₹60,000 in tax savings in year one and a further ₹36,000 in year two for a company paying 25.17%.

Few business investments pay 20% a year for 25 years with this little risk. The main risks are practical: a system that is badly sized, badly installed or built with panels that degrade faster than their warranty promises.

A lower tariff stretches payback. At ₹7 per unit, payback moves to about 6 years. At ₹11, it drops to under 4.

Who a 10kW solar system suits

A 10kW system fits businesses that:

• Use roughly 1,200 to 1,600 units a month, with a monthly bill of about ₹10,000 to ₹16,000
• Use most of that power during the day: shops, showrooms, clinics, schools, offices, small workshops and cold rooms
• Have a three-phase connection with a sanctioned load of at least 10kW
• Have about 1,000 sq ft of shade-free roof

If your bill is much higher, look at 20kW to 50kW. The per-kW cost falls further at that scale, and our guide to 600W and 635W panels explains the panel choices for larger systems. If your business runs mostly at night, such as a restaurant or a hotel, solar still helps, but you will export more power at a lower rate and payback will be longer.

Net metering and the 2026 panel rules

Under the national Electricity (Rights of Consumers) Rules, businesses can use net metering for systems up to 500kW or their sanctioned load, whichever is lower. Your state electricity regulator's rules apply where they differ, and some states limit net metering to certain categories or cap capacity relative to transformer size. Check with your DISCOM before you finalise the design.

Two 2026 developments matter:

1. Indian-made cells for net-metered systems

Since 1 June 2026, net-metering, open-access and government-backed projects must use modules from MNRE's ALMM List-I built with cells from ALMM List-II. In practice, that means modules with Indian-made cells. Ask your installer for proof of both for the exact modules supplied. Systems without it risk being refused net metering.

2. Proposed net-metering charges

In March 2026, the Ministry of Power published draft amendments that would allow a net-metering charge on systems above 5kW and introduce time-of-day tariffs. As of September 2026, these were still a draft. If they are adopted, systems that use most of their power on-site will be affected least. That is one more reason to size a business system to daytime load rather than to the sanctioned load.

How much Roof space, panels and inverter needed to be installed

A 10kW system needs about 1,000 sq ft of shade-free roof, including walking and cleaning space. With modern high-wattage panels:

Panel	Panels for about 10kW	Module area
Atal G12R 132 Series, 635W	16 panels (10.16kWp)	about 43 m² (465 sq ft)
Atal M10R 144 Series, 600W	17 panels (10.2kWp)	about 44 m² (474 sq ft)
Typical 540W panel	19 panels (10.26kWp)	about 49 m² (527 sq ft)

Fewer panels means fewer clamps, less rail and less labour. Atal's G12R 132 and M10R 144 modules are N-Type TOPCon, dual-glass and bifacial. They carry a 12-year product warranty and a 30-year power warranty that guarantees at least 87.4% of rated output in year 30.

Two technical checks before you order:

• Inverter current. The 635W panel's short-circuit current is about 15.5A. Make sure the inverter's input current per MPPT can handle it, with room for bifacial gain.
• Roof strength. The panels alone add about 12.5 to 13 kg per square metre, before the structure. On older roofs, have a structural engineer check the load.

Common mistakes when choosing 10kW solar system

1. Sizing to the sanctioned load instead of daytime use. If you close on Sundays and holidays, some output will be exported at a low rate. Size to what you use while the sun is up.

2. Ignoring the ALMM List-II rule. A cheaper quote with imported-cell modules may not get net metering approval.

3. Cheap structure. Commercial roofs face strong winds. Ask for structural drawings and the wind speed the design uses.

4. No monitoring. Insist on inverter monitoring you can check on your phone. A tripped breaker can cost a week of output before anyone notices.

5. Forgetting shade from rooftop equipment. Water tanks, AC outdoor units and staircase rooms cast long shadows in winter.

Is a 10kW solar system worth it for your business?

For most businesses with daytime load, yes. In 2026, the solar 10kW system price is about ₹5 lakh to ₹6.5 lakh installed. It produces 14,000 to 16,000 units a year, saves ₹1.2 lakh to ₹1.7 lakh a year at typical commercial tariffs, pays back in about 4 to 5 years and returns about 20% a year over its life. There is no subsidy, but accelerated depreciation and lower GST partly make up for it.

Before you sign, check your last twelve bills for daytime use, confirm net metering rules with your DISCOM, and ask for modules that meet the ALMM List-II rule. Compare quotes on lifetime cost per unit, not just the upfront price.

Use our solar calculator for a quick estimate, or send your electricity bill to the Atal Solar team for a module recommendation for your roof.

Frequently asked questions

What is the solar 10kW system price in India in 2026?

A complete 10kW on-grid system for a business costs about ₹5,00,000 to ₹6,50,000 installed, or ₹50,000 to ₹65,000 per kW. The price includes panels, a three-phase inverter, structure, cabling, protection, installation and net metering. Roof type and module choice move the price most.

Is there a subsidy for a 10kW solar system for business?

No. PM Surya Ghar covers only residential homes, and there is no central subsidy for commercial or industrial rooftops. Businesses instead benefit from accelerated depreciation at 40% of written-down value, GST on solar equipment at 5%, and savings against commercial tariffs of ₹8 to ₹11 per unit.

How many units does a 10kW solar system produce per day?

About 40 to 45 units a day as a yearly average, or 1,200 to 1,350 units a month. Output rises to 45 to 50 units a day in summer and falls to 30 to 35 in the monsoon. Sunny states such as Rajasthan and Gujarat produce more.

What is the payback period for a 10kW commercial solar system?

At a tariff of ₹9 per unit and an installed cost of ₹6 lakh, payback is about 4 to 5 years. At ₹11 per unit it falls to under 4 years, and at ₹7 it rises to about 6. Accelerated depreciation brings cash back faster in the first two years.

How much roof space does a 10kW solar system need?

About 1,000 square feet of shade-free roof. The panels themselves take about 43 to 49 square metres (465 to 527 sq ft), depending on panel wattage. The rest is spacing for access, cleaning and cable routes.

Can a business use net metering for a 10kW system?

Yes, in most states. National rules allow net metering up to 500kW or the sanctioned load, whichever is lower, subject to state regulations. From June 2026, net-metered systems must use ALMM-listed modules with cells from ALMM List-II.

How many panels are needed for a 10kW solar system?

16 panels of 635W give 10.16kWp, and 17 panels of 600W give 10.2kWp. With older 540W panels, you need 19. Fewer, higher-wattage panels save on structure, cabling and labour.

What ROI can a business expect from solar?

On typical 2026 costs and a ₹9 tariff, a 10kW system returns about 22% a year before tax and about 20% after tax over 25 years. Savings over the system's life can exceed ₹35 lakh.