Solar energy in Asahikawa, Japan
Average irradiation 3.31 kWh/m²/day · ~967 kWh per kWp per year
Monthly solar irradiation & temperature in Asahikawa (NASA POWER)
| Month | Irradiation (kWh/m²/day) | Avg temp (°C) | Est. production per kWp (kWh) |
|---|---|---|---|
| Jan | 1.50 | -9.3 | 37 |
| Feb | 2.28 | -8.9 | 56 |
| Mar | 3.46 | -4.7 | 84 |
| Apr | 4.50 | 2.6 | 109 |
| May | 5.01 | 9.8 | 122 |
| Jun | 5.06 | 14.9 | 123 |
| Jul | 4.78 | 19.1 | 116 |
| Aug | 4.28 | 19.6 | 104 |
| Sep | 3.60 | 14.9 | 88 |
| Oct | 2.55 | 7.6 | 62 |
| Nov | 1.49 | 0.2 | 36 |
| Dec | 1.16 | -6.6 | 28 |
Solar potential of Asahikawa explained
Asahikawa receives an average of 3.31 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 967 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 Asahikawa?
With 3.31 kWh/m²/day of average irradiation, a 1 kWp system in Asahikawa produces roughly 967 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 Asahikawa?
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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