Units a day in your city (4kW)
| City | Units a day | Units a month |
|---|---|---|
| Jodhpur | 18.1 | 550 |
| Jaipur | 17.5 | 533 |
| Rajkot | 16.7 | 507 |
| Indore | 16.7 | 507 |
| Ahmedabad | 16.4 | 500 |
| Hyderabad | 16.4 | 500 |
| Bhopal | 16.4 | 500 |
| Nagpur | 16.2 | 493 |
| Delhi | 15.9 | 483 |
| Pune | 15.9 | 483 |
| Bengaluru | 15.9 | 483 |
| Chennai | 15.9 | 483 |
| Surat | 15.8 | 480 |
| Chandigarh | 15.6 | 473 |
| Lucknow | 15.3 | 467 |
| Kanpur | 15.3 | 467 |
| Bhubaneswar | 15.1 | 460 |
| Mumbai | 14.8 | 450 |
| Patna | 14.8 | 450 |
| Kochi | 14.8 | 450 |
| Kolkata | 14.2 | 433 |
| Guwahati | 13.2 | 400 |
Average over the year, for panels facing south with no shade. Your real figure can be about 10% higher or lower.
Month by month
| Month | Units a day | Units in month |
|---|---|---|
| January | 15.9 | 493 |
| February | 18.2 | 510 |
| March | 18.3 | 568 |
| April | 19.1 | 574 |
| May | 18.7 | 580 |
| June | 15.5 | 464 |
| July | 11.8 | 365 |
| August | 11.6 | 360 |
| September | 14.3 | 429 |
| October | 16.1 | 499 |
| November | 15.9 | 476 |
| December | 15.5 | 481 |
For a typical city. In Tamil Nadu, the rainy dip comes in October to December instead.
Is your system working properly? Check in 3 steps
- Open your inverter app (or the screen on the inverter) and find today's units.
- On a sunny day, compare it with your city in the table above.
- Much lower for weeks? Clean the panels, check for new shade, and call your installer.
Common questions
How many units does a 4kW solar panel make per day?
About 16 units a day on average. Sunny places like Rajasthan and Gujarat get up to 18.1; cloudier places like Kolkata and Guwahati get about 13.2.
How many units does a 4kW solar system make per month?
About 400 to 550 units a month. Most in March to May, least in the rainy months.
How many units does 4kW solar make in a year?
About 4,800 to 6,600 units a year.
Why is my 4kW system making less than this?
The usual reasons: shade from a water tank, wall or tree; dusty panels (clean them every 2–3 weeks when it is dry); cloudy or rainy weather; or the inverter switching off. If you get less than 80% of these figures for a whole month, call your installer.
How much money does 4kW solar save?
About ₹3,383 a month at ₹7 per unit, if your home uses the units it makes. See 4kW price and savings.