Solar generation calculator
How many units will your solar system generate? Enter its size in kW and your city to see kWh per day, month and year, with a month-by-month chart, for anywhere in the world.
Your solar system
Location
Sunlight data for any place in the world
Panel angle and losses
Options
14% covers typical losses from heat, dust, wiring and the inverter. Use 20–25% for partial shade or dusty roofs.
| Jan | 440 kWh |
|---|---|
| Feb | 473 kWh |
| Mar | 638 kWh |
| Apr | 728 kWh |
| May | 836 kWh |
| Jun | 838 kWh |
| Jul | 836 kWh |
| Aug | 752 kWh |
| Sep | 617 kWh |
| Oct | 524 kWh |
| Nov | 426 kWh |
| Dec | 410 kWh |
Estimated from latitude. Panel tilt 25° (best for this place).
Estimates only, not a quote. Real output depends on shading, weather, panel quality and installation. Savings count solar power you use yourself at today's price, rising 3% a year, with panels losing 0.5% a year.
Use the solar generation calculator in 3 steps
- STEP 1
Enter the system size
Type the size of your solar system in kW, for example 3, 5 or 10 kW.
- STEP 2
Pick your city
Search your city or use your location. Sunlight data comes from PVGIS satellite records averaged over many years.
- STEP 3
See the units
Get the average kWh per day, month and year, generation for each month, peak sun hours and the best panel angle.
More solar calculators
- ☀️ Solar panel cost calculatorSize, cost after subsidy, savings and payback for any city in the world.
- ☀️ Solar production calculatorOutput per panel and per array, per day, month and year, for any location.
Typical prices are built in for 28 countries, including India, United States, United Kingdom, Canada, Australia, New Zealand, Germany, France, and sunlight data covers almost every city in the world.
Solar generation calculator FAQ
By using this tool you agree to its Terms of Use and privacy notice.
Between about 3 and 5 units (kWh) a day in most of India, the Middle East, Africa, Australia and the southern US, and 2 to 3 a day in northern Europe. Enter your city to see the exact figure for your place.
Roughly 18 to 25 kWh a day in sunny countries and 10 to 14 kWh in places like the UK or Germany. Generation changes by season, which the monthly chart shows.
The hours of full-strength sunshine a place gets in a day, on average. 5 peak sun hours means the panels get as much energy as 5 hours of bright midday sun.
Clouds, rain and short days reduce sunlight. In India, June to September usually give the lowest output; in Europe it's November to January.
From PVGIS, the European Commission's free solar database, which uses satellite and weather records for most of the world.
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Questions about the solar generation calculator?
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