Solar energy in Beihai, China
Average irradiation 4.05 kWh/m²/day · ~1183 kWh per kWp per year
Monthly solar irradiation & temperature in Beihai (NASA POWER)
| Month | Irradiation (kWh/m²/day) | Avg temp (°C) | Est. production per kWp (kWh) |
|---|---|---|---|
| Jan | 2.68 | 16.1 | 65 |
| Feb | 2.93 | 18.2 | 71 |
| Mar | 3.27 | 21.1 | 79 |
| Apr | 4.13 | 24.6 | 101 |
| May | 5.08 | 27.7 | 124 |
| Jun | 4.86 | 29.0 | 118 |
| Jul | 5.08 | 29.1 | 123 |
| Aug | 4.91 | 28.9 | 119 |
| Sep | 4.75 | 28.0 | 115 |
| Oct | 4.34 | 25.3 | 106 |
| Nov | 3.61 | 21.6 | 88 |
| Dec | 2.94 | 17.1 | 71 |
Solar potential of Beihai explained
Beihai receives an average of 4.05 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 1183 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 Beihai?
With 4.05 kWh/m²/day of average irradiation, a 1 kWp system in Beihai produces roughly 1183 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 Beihai?
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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