Solar energy in Shizuoka, Japan
Average irradiation 4.03 kWh/m²/day · ~1177 kWh per kWp per year
Monthly solar irradiation & temperature in Shizuoka (NASA POWER)
| Month | Irradiation (kWh/m²/day) | Avg temp (°C) | Est. production per kWp (kWh) |
|---|---|---|---|
| Jan | 2.72 | 1.4 | 66 |
| Feb | 3.31 | 2.7 | 80 |
| Mar | 4.20 | 5.8 | 102 |
| Apr | 4.86 | 10.7 | 118 |
| May | 5.22 | 15.5 | 127 |
| Jun | 4.75 | 19.2 | 115 |
| Jul | 5.17 | 23.0 | 126 |
| Aug | 5.46 | 24.0 | 133 |
| Sep | 4.26 | 20.9 | 104 |
| Oct | 3.25 | 15.5 | 79 |
| Nov | 2.67 | 9.8 | 65 |
| Dec | 2.44 | 4.1 | 59 |
Solar potential of Shizuoka explained
Shizuoka receives an average of 4.03 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 1177 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 Shizuoka?
With 4.03 kWh/m²/day of average irradiation, a 1 kWp system in Shizuoka produces roughly 1177 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 Shizuoka?
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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