Solar energy in Tallinn, Estonia
Average irradiation 2.7 kWh/m²/day · ~788 kWh per kWp per year
Monthly solar irradiation & temperature in Tallinn (NASA POWER)
| Month | Irradiation (kWh/m²/day) | Avg temp (°C) | Est. production per kWp (kWh) |
|---|---|---|---|
| Jan | 0.28 | -3.9 | 7 |
| Feb | 0.85 | -4.7 | 21 |
| Mar | 2.30 | -1.8 | 56 |
| Apr | 3.94 | 3.6 | 96 |
| May | 5.48 | 9.6 | 133 |
| Jun | 5.69 | 14.2 | 138 |
| Jul | 5.43 | 18.2 | 132 |
| Aug | 4.24 | 17.5 | 103 |
| Sep | 2.55 | 13.2 | 62 |
| Oct | 1.13 | 7.0 | 28 |
| Nov | 0.35 | 2.5 | 9 |
| Dec | 0.17 | -1.2 | 4 |
Solar potential of Tallinn explained
Tallinn receives an average of 2.7 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 788 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 Tallinn?
With 2.7 kWh/m²/day of average irradiation, a 1 kWp system in Tallinn produces roughly 788 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 Tallinn?
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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