Solar energy in Kagoshima, Japan
Average irradiation 3.98 kWh/m²/day · ~1162 kWh per kWp per year
Monthly solar irradiation & temperature in Kagoshima (NASA POWER)
| Month | Irradiation (kWh/m²/day) | Avg temp (°C) | Est. production per kWp (kWh) |
|---|---|---|---|
| Jan | 2.40 | 8.5 | 58 |
| Feb | 3.08 | 9.8 | 75 |
| Mar | 4.09 | 12.3 | 99 |
| Apr | 4.84 | 16.2 | 118 |
| May | 4.99 | 20.1 | 121 |
| Jun | 4.17 | 23.2 | 101 |
| Jul | 5.30 | 26.7 | 129 |
| Aug | 5.43 | 27.5 | 132 |
| Sep | 4.53 | 25.3 | 110 |
| Oct | 3.85 | 20.7 | 94 |
| Nov | 2.85 | 15.7 | 69 |
| Dec | 2.27 | 10.6 | 55 |
Solar potential of Kagoshima explained
Kagoshima receives an average of 3.98 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 1162 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 Kagoshima?
With 3.98 kWh/m²/day of average irradiation, a 1 kWp system in Kagoshima produces roughly 1162 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 Kagoshima?
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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