Solar energy in Tongshan, China
Average irradiation 3.79 kWh/m²/day · ~1107 kWh per kWp per year
Monthly solar irradiation & temperature in Tongshan (NASA POWER)
| Month | Irradiation (kWh/m²/day) | Avg temp (°C) | Est. production per kWp (kWh) |
|---|---|---|---|
| Jan | 2.37 | 0.2 | 58 |
| Feb | 2.86 | 3.3 | 69 |
| Mar | 4.08 | 8.9 | 99 |
| Apr | 4.84 | 15.5 | 118 |
| May | 5.26 | 21.4 | 128 |
| Jun | 5.03 | 25.8 | 122 |
| Jul | 4.57 | 27.8 | 111 |
| Aug | 4.48 | 26.7 | 109 |
| Sep | 3.99 | 22.0 | 97 |
| Oct | 3.30 | 15.9 | 80 |
| Nov | 2.54 | 8.4 | 62 |
| Dec | 2.21 | 1.6 | 54 |
Solar potential of Tongshan explained
Tongshan receives an average of 3.79 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 1107 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 Tongshan?
With 3.79 kWh/m²/day of average irradiation, a 1 kWp system in Tongshan produces roughly 1107 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 Tongshan?
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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