Solar energy in Nanjing, China
Average irradiation 3.62 kWh/m²/day · ~1057 kWh per kWp per year
Monthly solar irradiation & temperature in Nanjing (NASA POWER)
| Month | Irradiation (kWh/m²/day) | Avg temp (°C) | Est. production per kWp (kWh) |
|---|---|---|---|
| Jan | 2.25 | 2.1 | 55 |
| Feb | 2.66 | 4.8 | 65 |
| Mar | 3.79 | 9.8 | 92 |
| Apr | 4.56 | 15.9 | 111 |
| May | 4.82 | 21.6 | 117 |
| Jun | 4.47 | 25.5 | 109 |
| Jul | 4.57 | 28.3 | 111 |
| Aug | 4.50 | 27.7 | 109 |
| Sep | 3.86 | 23.4 | 94 |
| Oct | 3.25 | 17.6 | 79 |
| Nov | 2.51 | 11.0 | 61 |
| Dec | 2.20 | 4.0 | 54 |
Solar potential of Nanjing explained
Nanjing receives an average of 3.62 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 1057 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 Nanjing?
With 3.62 kWh/m²/day of average irradiation, a 1 kWp system in Nanjing produces roughly 1057 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 Nanjing?
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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