Solar energy in Brussels, Belgium
Average irradiation 3.03 kWh/m²/day · ~885 kWh per kWp per year
Monthly solar irradiation & temperature in Brussels (NASA POWER)
| Month | Irradiation (kWh/m²/day) | Avg temp (°C) | Est. production per kWp (kWh) |
|---|---|---|---|
| Jan | 0.82 | 2.6 | 20 |
| Feb | 1.51 | 3.2 | 37 |
| Mar | 2.73 | 5.9 | 66 |
| Apr | 4.25 | 9.7 | 103 |
| May | 5.03 | 13.4 | 122 |
| Jun | 5.43 | 16.7 | 132 |
| Jul | 5.23 | 18.6 | 127 |
| Aug | 4.39 | 18.1 | 107 |
| Sep | 3.37 | 15.0 | 82 |
| Oct | 1.98 | 11.1 | 48 |
| Nov | 0.98 | 6.7 | 24 |
| Dec | 0.65 | 3.4 | 16 |
Solar potential of Brussels explained
Brussels receives an average of 3.03 kilowatt-hours of solar energy per square metre per day, measured over four decades of satellite observation. In practical terms, every kilowatt-peak of installed PV capacity yields about 885 kWh of electricity per year here, assuming a well-oriented system with a typical 80% performance ratio. While winters are dark, modern panel prices mean solar can still be economical — self-consumption value matters more than raw sunshine here.
Frequently asked questions
Is solar worth it in Brussels?
With 3.03 kWh/m²/day of average irradiation, a 1 kWp system in Brussels produces roughly 885 kWh per year. That is a moderate solar resource; economics depend more on local electricity prices and incentives, which our AI planner can research for you.
How much electricity would a 5 kW system produce in Brussels?
Approximately 4,000 kWh per year — enough to cover a large share of a typical household's consumption.
What data is this based on?
Long-term satellite observations from NASA POWER (1981–present) and the PVGIS SARAH3 database, assuming a performance ratio of 80%.
Compare with nearby cities
London (2.6) · Paris (3.2) · Berlin (2.9) · Munich (3.3) · Madrid (4.8) · Barcelona (4.6) · all cities →