15 kW solar system price in India (2026)
A 15 kW rooftop system for a shop, school or factory costs about ₹6.87 lakh with GST. It makes about 2,190 units a month, saves about ₹19,710 a month, and with 40% accelerated depreciation pays back in about 3.1 years.
15 kW price, line by line
| Solar panels | ₹2,76,120 |
| Inverter | ₹1,05,000 |
| Mounting structure | ₹45,000 |
| Cables, DCDB, ACDB, earthing | ₹60,000 |
| Installation labour | ₹37,500 |
| Net meter, DISCOM fees, transport | ₹40,000 |
| Installer's margin | ₹67,634 |
| GST 5% on 70% of the value on ₹4,41,878 | ₹22,094 |
| GST 18% on 30% of the value on ₹1,89,376 | ₹34,088 |
| Price with GST | ₹6,87,436 |
2026 market averages from the same engine as the EPCoffice app. Your installer's brands and state change them — type your own rates in the calculator.
Tax and depreciation
A business can write off 40% of a solar plant's value in the first year (accelerated depreciation). At the 25.17% company tax rate that lowers the tax bill early, which is why the payback here is shorter than the price ÷ saving. Over 25 years the plant saves about ₹80.63 lakh, a return of about 31.4% a year.
Change the tax rate in the calculatorOther sizes
For a house, see 3 kW, 5 kW or 10 kW. All sizes on one page: solar prices, 1–100 kW.
Questions about 15 kW solar
How much does a 15 kW solar plant cost for a business?
About ₹6.87 lakh with GST in 2026 (₹45,829 per kW) for panels, inverter, structure, wiring, installation and the net meter. There is no central subsidy for businesses.
How many units does 15 kW make?
About 2,190 units a month at 4.8 units per kW a day (Jaipur).
What is the payback of a 15 kW plant?
About 3.1 years at ₹9 a unit, counting 40% accelerated depreciation at 25.17% tax.
How much roof does 15 kW need?
About 105 m² of shade-free roof, for 26 panels.