Solar energy in Daejeon, South Korea
Average irradiation 3.87 kWh/m²/day · ~1130 kWh per kWp per year
Monthly solar irradiation & temperature in Daejeon (NASA POWER)
| Month | Irradiation (kWh/m²/day) | Avg temp (°C) | Est. production per kWp (kWh) |
|---|---|---|---|
| Jan | 2.46 | -3.7 | 60 |
| Feb | 3.22 | -1.1 | 78 |
| Mar | 4.24 | 3.8 | 103 |
| Apr | 4.96 | 10.3 | 121 |
| May | 5.57 | 16.7 | 136 |
| Jun | 5.11 | 21.8 | 124 |
| Jul | 4.18 | 24.3 | 102 |
| Aug | 4.36 | 24.6 | 106 |
| Sep | 4.01 | 19.5 | 98 |
| Oct | 3.56 | 12.9 | 87 |
| Nov | 2.54 | 5.6 | 62 |
| Dec | 2.21 | -1.6 | 54 |
Solar potential of Daejeon explained
Daejeon receives an average of 3.87 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 1130 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 Daejeon?
With 3.87 kWh/m²/day of average irradiation, a 1 kWp system in Daejeon produces roughly 1130 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 Daejeon?
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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