Solar energy in Toyohashi, Japan
Average irradiation 4.08 kWh/m²/day · ~1191 kWh per kWp per year
Monthly solar irradiation & temperature in Toyohashi (NASA POWER)
| Month | Irradiation (kWh/m²/day) | Avg temp (°C) | Est. production per kWp (kWh) |
|---|---|---|---|
| Jan | 2.70 | 1.9 | 66 |
| Feb | 3.35 | 3.1 | 81 |
| Mar | 4.26 | 6.4 | 104 |
| Apr | 4.95 | 11.5 | 120 |
| May | 5.34 | 16.5 | 130 |
| Jun | 4.84 | 20.5 | 118 |
| Jul | 5.28 | 24.3 | 128 |
| Aug | 5.55 | 25.4 | 135 |
| Sep | 4.29 | 22.0 | 104 |
| Oct | 3.30 | 16.3 | 80 |
| Nov | 2.73 | 10.3 | 66 |
| Dec | 2.43 | 4.6 | 59 |
Solar potential of Toyohashi explained
Toyohashi receives an average of 4.08 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 1191 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 Toyohashi?
With 4.08 kWh/m²/day of average irradiation, a 1 kWp system in Toyohashi produces roughly 1191 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 Toyohashi?
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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