Solar energy in Naples, Italy
Average irradiation 4.56 kWh/m²/day · ~1332 kWh per kWp per year
Monthly solar irradiation & temperature in Naples (NASA POWER)
| Month | Irradiation (kWh/m²/day) | Avg temp (°C) | Est. production per kWp (kWh) |
|---|---|---|---|
| Jan | 1.91 | 7.3 | 46 |
| Feb | 2.75 | 7.6 | 67 |
| Mar | 4.00 | 10.0 | 97 |
| Apr | 5.40 | 13.3 | 131 |
| May | 6.63 | 17.5 | 161 |
| Jun | 7.50 | 22.5 | 182 |
| Jul | 7.57 | 25.5 | 184 |
| Aug | 6.65 | 25.7 | 162 |
| Sep | 4.94 | 21.1 | 120 |
| Oct | 3.45 | 17.1 | 84 |
| Nov | 2.16 | 12.6 | 53 |
| Dec | 1.70 | 8.5 | 41 |
Solar potential of Naples explained
Naples receives an average of 4.56 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 1332 kWh of electricity per year here, assuming a well-oriented system with a typical 80% performance ratio. This places Naples among the stronger solar locations globally — comparable to southern Spain or California.
Frequently asked questions
Is solar worth it in Naples?
With 4.56 kWh/m²/day of average irradiation, a 1 kWp system in Naples produces roughly 1332 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 Naples?
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
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