Solar energy in Changshu City, China
Average irradiation 3.62 kWh/m²/day · ~1057 kWh per kWp per year
Monthly solar irradiation & temperature in Changshu City (NASA POWER)
| Month | Irradiation (kWh/m²/day) | Avg temp (°C) | Est. production per kWp (kWh) |
|---|---|---|---|
| Jan | 2.21 | 3.2 | 54 |
| Feb | 2.64 | 5.4 | 64 |
| Mar | 3.68 | 9.7 | 90 |
| Apr | 4.38 | 15.5 | 107 |
| May | 4.65 | 21.0 | 113 |
| Jun | 4.17 | 24.9 | 101 |
| Jul | 4.93 | 28.4 | 120 |
| Aug | 4.78 | 28.1 | 116 |
| Sep | 3.94 | 23.8 | 96 |
| Oct | 3.34 | 18.3 | 81 |
| Nov | 2.52 | 12.3 | 61 |
| Dec | 2.21 | 5.3 | 54 |
Solar potential of Changshu City explained
Changshu City 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 Changshu City?
With 3.62 kWh/m²/day of average irradiation, a 1 kWp system in Changshu City 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 Changshu City?
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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