Solar energy in Gumi, South Korea
Average irradiation 3.96 kWh/m²/day · ~1156 kWh per kWp per year
Monthly solar irradiation & temperature in Gumi (NASA POWER)
| Month | Irradiation (kWh/m²/day) | Avg temp (°C) | Est. production per kWp (kWh) |
|---|---|---|---|
| Jan | 2.58 | -3.9 | 63 |
| Feb | 3.34 | -1.2 | 81 |
| Mar | 4.32 | 3.8 | 105 |
| Apr | 5.02 | 10.2 | 122 |
| May | 5.65 | 16.5 | 137 |
| Jun | 5.25 | 21.4 | 128 |
| Jul | 4.37 | 24.0 | 106 |
| Aug | 4.45 | 24.3 | 108 |
| Sep | 3.93 | 19.1 | 96 |
| Oct | 3.57 | 12.5 | 87 |
| Nov | 2.63 | 5.3 | 64 |
| Dec | 2.35 | -1.8 | 57 |
Solar potential of Gumi explained
Gumi receives an average of 3.96 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 1156 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 Gumi?
With 3.96 kWh/m²/day of average irradiation, a 1 kWp system in Gumi produces roughly 1156 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 Gumi?
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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