Solar energy in Espoo, Finland
Average irradiation 2.56 kWh/m²/day · ~748 kWh per kWp per year
Monthly solar irradiation & temperature in Espoo (NASA POWER)
| Month | Irradiation (kWh/m²/day) | Avg temp (°C) | Est. production per kWp (kWh) |
|---|---|---|---|
| Jan | 0.26 | -3.3 | 6 |
| Feb | 0.82 | -4.1 | 20 |
| Mar | 2.21 | -1.6 | 54 |
| Apr | 3.76 | 3.2 | 91 |
| May | 5.16 | 8.8 | 125 |
| Jun | 5.37 | 13.6 | 131 |
| Jul | 5.18 | 17.5 | 126 |
| Aug | 4.01 | 17.1 | 98 |
| Sep | 2.41 | 13.1 | 59 |
| Oct | 1.08 | 7.1 | 26 |
| Nov | 0.33 | 3.1 | 8 |
| Dec | 0.15 | -0.6 | 4 |
Solar potential of Espoo explained
Espoo receives an average of 2.56 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 748 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 Espoo?
With 2.56 kWh/m²/day of average irradiation, a 1 kWp system in Espoo produces roughly 748 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 Espoo?
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%.
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