Solar energy in Tehran, Iran
Average irradiation 5.18 kWh/m²/day · ~1513 kWh per kWp per year
Monthly solar irradiation & temperature in Tehran (NASA POWER)
| Month | Irradiation (kWh/m²/day) | Avg temp (°C) | Est. production per kWp (kWh) |
|---|---|---|---|
| Jan | 2.71 | 3.3 | 66 |
| Feb | 3.51 | 5.5 | 85 |
| Mar | 4.69 | 10.7 | 114 |
| Apr | 5.67 | 15.7 | 138 |
| May | 6.95 | 22.0 | 169 |
| Jun | 8.02 | 27.9 | 195 |
| Jul | 7.63 | 30.5 | 185 |
| Aug | 7.14 | 29.2 | 174 |
| Sep | 6.02 | 24.8 | 146 |
| Oct | 4.42 | 18.2 | 108 |
| Nov | 2.97 | 9.6 | 72 |
| Dec | 2.45 | 4.8 | 60 |
Solar potential of Tehran explained
Tehran receives an average of 5.18 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 1513 kWh of electricity per year here, assuming a well-oriented system with a typical 80% performance ratio. This places Tehran among the stronger solar locations globally — comparable to southern Spain or California.
Frequently asked questions
Is solar worth it in Tehran?
With 5.18 kWh/m²/day of average irradiation, a 1 kWp system in Tehran produces roughly 1513 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 Tehran?
Approximately 8,000 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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