Solar energy in Utsunomiya, Japan
Average irradiation 3.8 kWh/m²/day · ~1110 kWh per kWp per year
Monthly solar irradiation & temperature in Utsunomiya (NASA POWER)
| Month | Irradiation (kWh/m²/day) | Avg temp (°C) | Est. production per kWp (kWh) |
|---|---|---|---|
| Jan | 2.61 | 1.2 | 63 |
| Feb | 3.32 | 2.2 | 81 |
| Mar | 4.15 | 5.8 | 101 |
| Apr | 4.84 | 11.3 | 118 |
| May | 5.17 | 16.8 | 126 |
| Jun | 4.66 | 20.8 | 113 |
| Jul | 4.46 | 24.7 | 108 |
| Aug | 4.63 | 25.7 | 113 |
| Sep | 3.74 | 21.7 | 91 |
| Oct | 3.09 | 15.5 | 75 |
| Nov | 2.61 | 9.5 | 63 |
| Dec | 2.31 | 3.8 | 56 |
Solar potential of Utsunomiya explained
Utsunomiya receives an average of 3.8 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 1110 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 Utsunomiya?
With 3.8 kWh/m²/day of average irradiation, a 1 kWp system in Utsunomiya produces roughly 1110 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 Utsunomiya?
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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