Solar energy in Chiba, Japan
Average irradiation 3.77 kWh/m²/day · ~1101 kWh per kWp per year
Monthly solar irradiation & temperature in Chiba (NASA POWER)
| Month | Irradiation (kWh/m²/day) | Avg temp (°C) | Est. production per kWp (kWh) |
|---|---|---|---|
| Jan | 2.54 | 4.7 | 62 |
| Feb | 3.02 | 5.6 | 73 |
| Mar | 3.81 | 8.8 | 93 |
| Apr | 4.62 | 13.5 | 112 |
| May | 5.01 | 18.2 | 122 |
| Jun | 4.63 | 21.8 | 113 |
| Jul | 4.95 | 25.5 | 120 |
| Aug | 5.19 | 26.9 | 126 |
| Sep | 3.93 | 23.6 | 96 |
| Oct | 2.92 | 18.1 | 71 |
| Nov | 2.38 | 12.7 | 58 |
| Dec | 2.24 | 7.3 | 54 |
Solar potential of Chiba explained
Chiba receives an average of 3.77 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 1101 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 Chiba?
With 3.77 kWh/m²/day of average irradiation, a 1 kWp system in Chiba produces roughly 1101 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 Chiba?
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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