Solar energy in Haikou, China
Average irradiation 4.3 kWh/m²/day · ~1256 kWh per kWp per year
Monthly solar irradiation & temperature in Haikou (NASA POWER)
| Month | Irradiation (kWh/m²/day) | Avg temp (°C) | Est. production per kWp (kWh) |
|---|---|---|---|
| Jan | 2.82 | 18.8 | 69 |
| Feb | 3.33 | 20.0 | 81 |
| Mar | 3.86 | 22.4 | 94 |
| Apr | 4.66 | 25.3 | 113 |
| May | 5.45 | 27.6 | 133 |
| Jun | 5.49 | 28.4 | 133 |
| Jul | 5.58 | 28.4 | 136 |
| Aug | 5.14 | 28.2 | 125 |
| Sep | 4.72 | 27.7 | 115 |
| Oct | 4.16 | 25.9 | 101 |
| Nov | 3.50 | 23.5 | 85 |
| Dec | 2.86 | 20.1 | 70 |
Solar potential of Haikou explained
Haikou receives an average of 4.3 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 1256 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 Haikou?
With 4.3 kWh/m²/day of average irradiation, a 1 kWp system in Haikou produces roughly 1256 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 Haikou?
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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