Solar energy in Rome, Italy
Average irradiation 4.52 kWh/m²/day · ~1320 kWh per kWp per year
Monthly solar irradiation & temperature in Rome (NASA POWER)
| Month | Irradiation (kWh/m²/day) | Avg temp (°C) | Est. production per kWp (kWh) |
|---|---|---|---|
| Jan | 1.82 | 7.0 | 44 |
| Feb | 2.77 | 7.6 | 67 |
| Mar | 4.05 | 10.3 | 98 |
| Apr | 5.46 | 13.9 | 133 |
| May | 6.64 | 18.0 | 161 |
| Jun | 7.49 | 22.8 | 182 |
| Jul | 7.59 | 26.0 | 184 |
| Aug | 6.60 | 26.1 | 161 |
| Sep | 4.84 | 21.4 | 118 |
| Oct | 3.34 | 17.2 | 81 |
| Nov | 2.05 | 12.4 | 50 |
| Dec | 1.64 | 8.1 | 40 |
Solar potential of Rome explained
Rome receives an average of 4.52 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 1320 kWh of electricity per year here, assuming a well-oriented system with a typical 80% performance ratio. This places Rome among the stronger solar locations globally — comparable to southern Spain or California.
Frequently asked questions
Is solar worth it in Rome?
With 4.52 kWh/m²/day of average irradiation, a 1 kWp system in Rome produces roughly 1320 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 Rome?
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%.
Compare with nearby cities
London (2.6) · Paris (3.2) · Berlin (2.9) · Munich (3.3) · Madrid (4.8) · Barcelona (4.6) · all cities →