Solar energy in Hanoi, Vietnam
Average irradiation 3.74 kWh/m²/day · ~1092 kWh per kWp per year
Monthly solar irradiation & temperature in Hanoi (NASA POWER)
| Month | Irradiation (kWh/m²/day) | Avg temp (°C) | Est. production per kWp (kWh) |
|---|---|---|---|
| Jan | 2.24 | 15.4 | 54 |
| Feb | 2.65 | 18.2 | 64 |
| Mar | 2.97 | 21.4 | 72 |
| Apr | 3.76 | 25.1 | 92 |
| May | 4.74 | 27.5 | 115 |
| Jun | 4.95 | 28.5 | 120 |
| Jul | 4.83 | 28.4 | 117 |
| Aug | 4.68 | 27.9 | 114 |
| Sep | 4.50 | 26.7 | 109 |
| Oct | 3.76 | 23.8 | 91 |
| Nov | 3.24 | 20.3 | 79 |
| Dec | 2.54 | 16.0 | 62 |
Solar potential of Hanoi explained
Hanoi receives an average of 3.74 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 1092 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 Hanoi?
With 3.74 kWh/m²/day of average irradiation, a 1 kWp system in Hanoi produces roughly 1092 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 Hanoi?
Approximately 5,000 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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