If you are comparing quotes for rooftop solar, you have probably noticed that the numbers rarely match. One installer quotes ₹1.6 lakh for a 3 kW system and another quotes ₹2.1 lakh. This guide explains what drives the cost of solar panel installation for a home in India, what you can expect to pay for 1 kW, 2 kW and 3 kW systems, and how the PM Surya Ghar subsidy changes the final amount. By the end you will know which questions to ask before you sign anything.
What Decides the Cost of Solar Panel Installation for a Home?
Five things move the price more than anything else:
- System size: Cost rises with capacity, though the per-kW rate usually falls a little as the system gets bigger.
- Equipment quality: Panel type, inverter brand and warranty terms all affect the quote.
- Roof and structure: Mounting structure, roof type and cable length change the material and labour needed.
- Net metering and paperwork: Your electricity distribution company (DISCOM) has its own application and meter process.
- Installer and city: Labour rates and logistics differ between cities, and so do installer margins.
Home Solar Panel Price in India by System Size
Prices below are indicative 2026 market ranges for a complete on-grid rooftop system, including panels, inverter, structure, wiring and installation. Actual quotes depend on your city, brand and roof.
| System size | Approx. cost before subsidy | Central subsidy | Approx. cost after subsidy |
| 1 kW | ₹65,000 – ₹85,000 | ₹30,000 | ₹35,000 – ₹55,000 |
| 2 kW | ₹1.2 – ₹1.5 lakh | ₹60,000 | ₹60,000 – ₹90,000 |
| 3 kW | ₹1.7 – ₹2.1 lakh | ₹78,000 | ₹92,000 – ₹1.32 lakh |
Published estimates vary by source, so treat these as a planning range and confirm them against written quotes.
1 kW Solar System Price for Home
A 1 kW system suits a small household with low monthly consumption. It needs about 100 sq ft of shadow-free roof space. Subsidy covers a large share of the cost at this size, but the system produces little, so it works best for homes with only a few fans, lights and a fridge.
3 kW Solar System Installation Cost
A 3 kW system is the most popular choice for 2–3 BHK homes and families with air conditioners. It is also the size at which the central subsidy reaches its maximum, which makes it the best subsidy value for most households.
Residential Solar Panel Cost With Subsidy
Under the PM Surya Ghar: Muft Bijli Yojana, the policy covers 60% of the cost for systems up to 2 kW and 40% of the incremental cost between 2 kW and 3 kW. In rupees, that is ₹30,000 per kW up to 2 kW, plus ₹18,000 for the third kW, with a total cap of ₹78,000.
Two points are easy to miss:
- Larger systems do not earn more subsidy. A 5 kW system gets the same ₹78,000 as a 3 kW system, so every kW beyond 3 is fully self-funded.
- You pay first. You pay the full system price up front, register on the national portal, and the subsidy follows once the installation is inspected and approved.
Some states add their own incentives on top, so check your state nodal agency before finalising the budget.
Worked Example: 3 kW System
If your quote is ₹1.9 lakh, subtracting the ₹78,000 central subsidy leaves about ₹1.12 lakh. Check this against your own quote and any state top-up.
How Much Solar Do You Actually Need?
Size the system to your bill, not to the subsidy slab.
- Up to 150 units a month: about 1 kW
- 150–300 units a month: about 2–3 kW
- Above 300 units a month: 3 kW or more
As a rough guide, each kW generates around 4 units on a good day in much of India. A 3 kW system would then give about 12 units a day, or roughly 360 units a month. At a tariff of ₹6–₹8 per unit, that offsets about ₹2,200–₹2,900 of your bill each month. This is an illustration, not a guarantee: output depends on shade, tilt, dust and season.
Is an On-Grid System the Right Choice?
Most homes use an on-grid (grid-tied) system. It has no battery, which keeps the cost lower, and it uses net metering, where surplus power goes to the grid and you receive credit for it. Off-grid and hybrid systems with batteries cost considerably more, so they make sense mainly where power cuts are frequent or grid supply is unreliable.
How to Get an Accurate Quote
- Keep your last 6–12 electricity bills handy to calculate average monthly units.
- Measure usable, shadow-free roof area.
- Ask for an itemised quote covering panel make and wattage, inverter brand, structure, cabling and net meter charges.
- Confirm that the installer is registered for the subsidy and handles the portal application.
- Ask for warranty terms on panels, inverter and workmanship in writing.
- Ask about post-installation maintenance and performance support.
KLK Ventures Pvt Ltd, based in Noida, offers on-grid solar systems for homes and businesses. According to its website, its team handles consultation, installation, net metering guidance and help with government subsidy applications. If you want that support, its on-grid solar system page explains the process.
FAQ Section
- What is the cost of solar panel installation for a home in India?
Most homes spend roughly ₹65,000–₹85,000 for 1 kW and ₹1.7–₹2.1 lakh for 3 kW before subsidy. The final figure depends on equipment, roof and location. - How much subsidy do I get for a 3 kW home solar system?
The central subsidy is ₹78,000 for 3 kW and above. Some states offer an additional amount. - Do I need batteries for a home solar system?
No. An on-grid system works without batteries and relies on net metering. Batteries are needed only for off-grid or backup setups. - How much roof space does a 3 kW system need?
About 300 sq ft of shadow-free space, based on roughly 100 sq ft per kW. - When do I receive the subsidy?
It is released after your installation is inspected and approved, and it is credited directly to your bank account.
Conclusion
The cost of solar panel installation for a home in India depends on system size, equipment and local factors, but the subsidy makes 2–3 kW systems the most cost-effective for most households. Size the system to your monthly units, compare itemised quotes, and verify subsidy eligibility before you pay.
Planning rooftop solar for your home? Contact KLK Ventures to discuss your electricity usage, roof space and subsidy options.