Solar energy in Hakodate, Japan
Average irradiation 3.23 kWh/m²/day · ~943 kWh per kWp per year
Monthly solar irradiation & temperature in Hakodate (NASA POWER)
| Month | Irradiation (kWh/m²/day) | Avg temp (°C) | Est. production per kWp (kWh) |
|---|---|---|---|
| Jan | 1.33 | -2.5 | 32 |
| Feb | 1.98 | -2.3 | 48 |
| Mar | 3.19 | 0.9 | 78 |
| Apr | 4.43 | 5.6 | 108 |
| May | 4.99 | 10.7 | 121 |
| Jun | 5.00 | 15.4 | 122 |
| Jul | 4.37 | 19.3 | 106 |
| Aug | 4.23 | 21.4 | 103 |
| Sep | 3.75 | 18.5 | 91 |
| Oct | 2.75 | 12.5 | 67 |
| Nov | 1.61 | 5.8 | 39 |
| Dec | 1.14 | -0.3 | 28 |
Solar potential of Hakodate explained
Hakodate receives an average of 3.23 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 943 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 Hakodate?
With 3.23 kWh/m²/day of average irradiation, a 1 kWp system in Hakodate produces roughly 943 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 Hakodate?
Approximately 5,000 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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