Solar energy in Haiphong, Vietnam
Average irradiation 3.89 kWh/m²/day · ~1136 kWh per kWp per year
Monthly solar irradiation & temperature in Haiphong (NASA POWER)
| Month | Irradiation (kWh/m²/day) | Avg temp (°C) | Est. production per kWp (kWh) |
|---|---|---|---|
| Jan | 2.41 | 15.8 | 59 |
| Feb | 2.70 | 17.7 | 66 |
| Mar | 2.90 | 20.5 | 71 |
| Apr | 3.95 | 24.0 | 96 |
| May | 5.15 | 26.9 | 125 |
| Jun | 5.29 | 28.2 | 129 |
| Jul | 5.13 | 28.3 | 125 |
| Aug | 4.64 | 28.0 | 113 |
| Sep | 4.49 | 27.1 | 109 |
| Oct | 4.00 | 24.5 | 97 |
| Nov | 3.39 | 21.1 | 82 |
| Dec | 2.68 | 16.9 | 65 |
Solar potential of Haiphong explained
Haiphong receives an average of 3.89 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 1136 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 Haiphong?
With 3.89 kWh/m²/day of average irradiation, a 1 kWp system in Haiphong produces roughly 1136 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 Haiphong?
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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