Solar energy in Fukuoka, Japan
Average irradiation 3.82 kWh/m²/day · ~1115 kWh per kWp per year
Monthly solar irradiation & temperature in Fukuoka (NASA POWER)
| Month | Irradiation (kWh/m²/day) | Avg temp (°C) | Est. production per kWp (kWh) |
|---|---|---|---|
| Jan | 2.18 | 3.8 | 53 |
| Feb | 2.90 | 5.2 | 71 |
| Mar | 3.97 | 8.1 | 97 |
| Apr | 4.84 | 13.1 | 118 |
| May | 5.24 | 17.9 | 127 |
| Jun | 4.54 | 21.7 | 110 |
| Jul | 4.75 | 25.6 | 115 |
| Aug | 5.07 | 26.4 | 123 |
| Sep | 4.13 | 22.6 | 100 |
| Oct | 3.55 | 16.9 | 86 |
| Nov | 2.63 | 11.5 | 64 |
| Dec | 2.04 | 6.0 | 50 |
Solar potential of Fukuoka explained
Fukuoka receives an average of 3.82 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 1115 kWh of electricity per year here, assuming a well-oriented system with a typical 80% performance ratio. This is a solid mid-range solar resource: production is meaningful year-round, though winter output drops noticeably.
Frequently asked questions
Is solar worth it in Fukuoka?
With 3.82 kWh/m²/day of average irradiation, a 1 kWp system in Fukuoka produces roughly 1115 kWh per year. That is a good solar resource; with current panel prices most systems pay back well within their lifetime.
How much electricity would a 5 kW system produce in Fukuoka?
Approximately 6,000 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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