Solar energy in Zanjān, Iran
Average irradiation 5.13 kWh/m²/day · ~1498 kWh per kWp per year
Monthly solar irradiation & temperature in Zanjān (NASA POWER)
| Month | Irradiation (kWh/m²/day) | Avg temp (°C) | Est. production per kWp (kWh) |
|---|---|---|---|
| Jan | 2.78 | -2.6 | 68 |
| Feb | 3.70 | -1.0 | 90 |
| Mar | 4.55 | 3.8 | 111 |
| Apr | 5.50 | 8.6 | 134 |
| May | 6.83 | 14.3 | 166 |
| Jun | 8.02 | 18.6 | 195 |
| Jul | 7.67 | 20.4 | 187 |
| Aug | 7.17 | 20.1 | 174 |
| Sep | 6.00 | 17.1 | 146 |
| Oct | 4.22 | 11.6 | 103 |
| Nov | 2.80 | 3.5 | 68 |
| Dec | 2.34 | -0.9 | 57 |
Solar potential of Zanjān explained
Zanjān receives an average of 5.13 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 1498 kWh of electricity per year here, assuming a well-oriented system with a typical 80% performance ratio. This places Zanjān among the stronger solar locations globally — comparable to southern Spain or California.
Frequently asked questions
Is solar worth it in Zanjān?
With 5.13 kWh/m²/day of average irradiation, a 1 kWp system in Zanjān produces roughly 1498 kWh per year. That is an excellent solar resource — payback periods are typically among the shortest worldwide.
How much electricity would a 5 kW system produce in Zanjān?
Approximately 7,000 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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