Solar energy in Bologna, Italy
Average irradiation 3.93 kWh/m²/day · ~1148 kWh per kWp per year
Monthly solar irradiation & temperature in Bologna (NASA POWER)
| Month | Irradiation (kWh/m²/day) | Avg temp (°C) | Est. production per kWp (kWh) |
|---|---|---|---|
| Jan | 1.41 | 3.5 | 34 |
| Feb | 2.30 | 4.6 | 56 |
| Mar | 3.59 | 8.6 | 87 |
| Apr | 4.82 | 12.9 | 117 |
| May | 5.92 | 17.7 | 144 |
| Jun | 6.73 | 23.0 | 164 |
| Jul | 6.86 | 26.1 | 167 |
| Aug | 5.87 | 25.6 | 143 |
| Sep | 4.29 | 19.9 | 104 |
| Oct | 2.67 | 14.7 | 65 |
| Nov | 1.51 | 9.0 | 37 |
| Dec | 1.22 | 4.4 | 30 |
Solar potential of Bologna explained
Bologna receives an average of 3.93 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 1148 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 Bologna?
With 3.93 kWh/m²/day of average irradiation, a 1 kWp system in Bologna produces roughly 1148 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 Bologna?
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%.
Compare with nearby cities
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