Solar energy in Takamatsu, Japan
Average irradiation 4 kWh/m²/day · ~1168 kWh per kWp per year
Monthly solar irradiation & temperature in Takamatsu (NASA POWER)
| Month | Irradiation (kWh/m²/day) | Avg temp (°C) | Est. production per kWp (kWh) |
|---|---|---|---|
| Jan | 2.45 | 4.5 | 60 |
| Feb | 3.08 | 5.6 | 75 |
| Mar | 4.12 | 8.5 | 100 |
| Apr | 5.00 | 13.4 | 122 |
| May | 5.41 | 18.2 | 131 |
| Jun | 4.97 | 22.2 | 121 |
| Jul | 5.12 | 26.1 | 125 |
| Aug | 5.39 | 27.3 | 131 |
| Sep | 4.19 | 23.7 | 102 |
| Oct | 3.43 | 18.1 | 83 |
| Nov | 2.62 | 12.4 | 64 |
| Dec | 2.21 | 6.8 | 54 |
Solar potential of Takamatsu explained
Takamatsu receives an average of 4 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 1168 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 Takamatsu?
With 4 kWh/m²/day of average irradiation, a 1 kWp system in Takamatsu produces roughly 1168 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 Takamatsu?
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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