Solar energy in Matsuyama, Japan
Average irradiation 3.95 kWh/m²/day · ~1153 kWh per kWp per year
Monthly solar irradiation & temperature in Matsuyama (NASA POWER)
| Month | Irradiation (kWh/m²/day) | Avg temp (°C) | Est. production per kWp (kWh) |
|---|---|---|---|
| Jan | 2.35 | 6.4 | 57 |
| Feb | 3.08 | 7.2 | 75 |
| Mar | 4.13 | 9.7 | 101 |
| Apr | 4.97 | 14.0 | 121 |
| May | 5.32 | 18.2 | 129 |
| Jun | 4.59 | 21.9 | 112 |
| Jul | 5.09 | 25.6 | 124 |
| Aug | 5.28 | 26.9 | 128 |
| Sep | 4.28 | 24.0 | 104 |
| Oct | 3.54 | 19.3 | 86 |
| Nov | 2.64 | 14.2 | 64 |
| Dec | 2.09 | 8.7 | 51 |
Solar potential of Matsuyama explained
Matsuyama receives an average of 3.95 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 1153 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 Matsuyama?
With 3.95 kWh/m²/day of average irradiation, a 1 kWp system in Matsuyama produces roughly 1153 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 Matsuyama?
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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