Solar energy in Sendai, Japan
Average irradiation 3.41 kWh/m²/day · ~996 kWh per kWp per year
Monthly solar irradiation & temperature in Sendai (NASA POWER)
| Month | Irradiation (kWh/m²/day) | Avg temp (°C) | Est. production per kWp (kWh) |
|---|---|---|---|
| Jan | 1.73 | -3.3 | 42 |
| Feb | 2.49 | -3.1 | 61 |
| Mar | 3.48 | 0.7 | 85 |
| Apr | 4.54 | 6.8 | 110 |
| May | 5.04 | 12.9 | 122 |
| Jun | 4.94 | 17.4 | 120 |
| Jul | 4.27 | 21.4 | 104 |
| Aug | 4.39 | 22.5 | 107 |
| Sep | 3.65 | 18.3 | 89 |
| Oct | 2.86 | 11.8 | 69 |
| Nov | 2.04 | 5.5 | 50 |
| Dec | 1.50 | -0.3 | 37 |
Solar potential of Sendai explained
Sendai receives an average of 3.41 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 996 kWh of electricity per year here, assuming a well-oriented system with a typical 80% performance ratio. While winters are dark, modern panel prices mean solar can still be economical — self-consumption value matters more than raw sunshine here.
Frequently asked questions
Is solar worth it in Sendai?
With 3.41 kWh/m²/day of average irradiation, a 1 kWp system in Sendai produces roughly 996 kWh per year. That is a moderate solar resource; economics depend more on local electricity prices and incentives, which our AI planner can research for you.
How much electricity would a 5 kW system produce in Sendai?
Approximately 5,000 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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