Solar energy in Belfast, United Kingdom
Average irradiation 2.72 kWh/m²/day · ~794 kWh per kWp per year
Monthly solar irradiation & temperature in Belfast (NASA POWER)
| Month | Irradiation (kWh/m²/day) | Avg temp (°C) | Est. production per kWp (kWh) |
|---|---|---|---|
| Jan | 0.57 | 5.8 | 14 |
| Feb | 1.26 | 5.5 | 31 |
| Mar | 2.47 | 6.2 | 60 |
| Apr | 3.93 | 8.0 | 95 |
| May | 5.02 | 10.5 | 122 |
| Jun | 5.11 | 13.1 | 124 |
| Jul | 4.82 | 14.5 | 117 |
| Aug | 3.97 | 14.5 | 97 |
| Sep | 2.80 | 13.3 | 68 |
| Oct | 1.55 | 11.1 | 38 |
| Nov | 0.73 | 8.4 | 18 |
| Dec | 0.42 | 6.6 | 10 |
Solar potential of Belfast explained
Belfast receives an average of 2.72 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 794 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 Belfast?
With 2.72 kWh/m²/day of average irradiation, a 1 kWp system in Belfast produces roughly 794 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 Belfast?
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 →