Price, subsidy and output
Key takeaways
- Typical installed price: ₹2.77 lakh to ₹3.08 lakh with DCR panels, before subsidy.
- PM Surya Ghar subsidy: ₹78,000 (₹85,800 in hill and North East states).
- You pay about ₹2 lakh to ₹2.29 lakh after subsidy.
- Makes about 16 units a day, 480 a month, on 400 sq ft of shade-free roof.
4 kW solar system price in 2026
A 4 kW on-grid rooftop system with DCR panels typically costs ₹2.77 lakh to ₹3.08 lakh fully installed in 2026. That covers 8 panels of 540 Wp, an on-grid inverter, the mounting structure, wiring, earthing, the net meter application and installation. After the ₹78,000 PM Surya Ghar subsidy you pay about ₹2 lakh to ₹2.29 lakh, or ₹49,875 to ₹57,375 per kW.
The subsidy stops growing at 3 kW, so the fourth kW is at full price. It still pays off if you use the units yourself, typically in homes with two ACs.
| 4 kW system | |
|---|---|
| Installed price (before subsidy) | ₹2.77 lakh to ₹3.08 lakh |
| Central subsidy, most states | ₹78,000 |
| Central subsidy, special category states | ₹85,800 |
| Your cost after subsidy | ₹2 lakh to ₹2.29 lakh |
| Panels (540 Wp) | 8 |
| Shade-free roof | 400 sq ft |
How many units does a 4 kW system make?
Across India, a 4 kW system makes about 15.8 units a day, 480 a month and 5,760 a year. That is enough for a home with two 1.5 tonne inverter ACs used six hours a night plus fans, lights, a fridge and a TV, about 485 units a month. Output depends on your state:
| State | Units a day | Units a month | Subsidy |
|---|---|---|---|
| Uttar Pradesh | 16.6 | 505 | ₹78,000 |
| Maharashtra | 15.9 | 484 | ₹78,000 |
| Rajasthan | 17.2 | 523 | ₹78,000 |
| Gujarat | 16.6 | 504 | ₹78,000 |
| Karnataka | 16.0 | 486 | ₹78,000 |
| Tamil Nadu | 15.8 | 479 | ₹78,000 |
| Delhi | 17.0 | 518 | ₹78,000 |
| Madhya Pradesh | 16.1 | 490 | ₹78,000 |
| Bihar | 16.1 | 489 | ₹78,000 |
| West Bengal | 14.9 | 454 | ₹78,000 |
| Kerala | 14.1 | 429 | ₹78,000 |
| Punjab | 16.9 | 514 | ₹78,000 |
| Haryana | 17.1 | 520 | ₹78,000 |
| Telangana | 15.9 | 483 | ₹78,000 |
| Odisha | 15.1 | 459 | ₹78,000 |
| Assam | 14.0 | 426 | ₹85,800 |
Payback at your electricity rate
If you use all 480 units yourself, the saving and payback at different per-unit rates are:
| You pay per unit | Saving a year | Payback (years) |
|---|---|---|
| ₹6 | ₹34,560 | 5.8–6.6 |
| ₹7 | ₹40,320 | 4.9–5.7 |
| ₹8 | ₹46,080 | 4.3–5.0 |
| ₹9 | ₹51,840 | 3.8–4.4 |
EMI on a 4 kW solar loan
With 10% down and the rest on a 10-year loan at 7.9%, the EMI is about ₹3,180 a month on a loan of ₹2.63 lakh. Put the ₹78,000 subsidy into the loan when it arrives and the EMI drops to about ₹2,238. Check the numbers for your quote in the solar EMI calculator.
What to check in the quote
- DCR panels on the ALMM list, named by make and model.
- Inverter make, model and warranty (usually 5 to 10 years).
- Structure height and material; a raised structure costs more but keeps the terrace usable.
- Who files the net meter application and what the DISCOM charges for it.
- Five years of free maintenance, which registered PM Surya Ghar vendors must provide.
Frequently asked questions
What is the price of a 4 kW solar system with subsidy?
About ₹2 lakh to ₹2.29 lakh after the ₹78,000 PM Surya Ghar subsidy, on a typical installed price of ₹2.77 lakh to ₹3.08 lakh in 2026.
How many units does a 4 kW solar system produce per day?
About 15.8 units a day on average across India, or 480 a month. Sunnier states like Rajasthan make about 9% more; Kerala and the North East about 10% less.
How much roof space does a 4 kW solar system need?
About 400 sq ft of shade-free roof for 8 panels of 540 Wp, including space to walk and clean.
How much subsidy is there on 4 kW?
₹78,000 in most states and ₹85,800 in special category states such as Uttarakhand, Himachal Pradesh and the North East.
What is the EMI for a 4 kW solar system?
About ₹3,180 a month over 10 years at 7.9% with 10% down, falling to about ₹2,238 if the subsidy repays part of the loan.
Compare other sizes: 1 kW · 2 kW · 3 kW · 5 kW · 10 kW. Not sure of the size? Start from your bill in the solar calculator. How we work out every figure: how we calculate.