How much electricity do solar panels make in Naples, Italy?
≈ 5,991 kWh a year
In Naples, Italy, ten 400 W mono PERC solar panels (4 kWp) on a roof facing the equator at the best yearly tilt (30°) make about 5,991 kWh of electricity a year — 1,498 kWh for every installed kilowatt.
1,498 kWh/kWpspecific yield per year
30°best yearly panel tilt
1,614 kWh/m²yearly sunlight on level ground
Julybest month (December lowest)
Solar energy month by month in Naples
| Month | 4 kWp system (kWh) | per kWp (kWh) |
|---|---|---|
| January | 317 | 79 |
| February | 357 | 89 |
| March | 490 | 122 |
| April | 556 | 139 |
| May | 635 | 159 |
| June | 657 | 164 |
| July | 696 | 174 |
| August | 665 | 166 |
| September | 542 | 136 |
| October | 463 | 116 |
| November | 323 | 81 |
| December | 290 | 72 |
How these numbers were calculated
NASA POWER long-term monthly means on a 1° grid around the city, the monthly method of Duffie & Beckman (isotropic sky, each month's average day), panel temperature from NOCT, 10 % other losses and a 96 % inverter. No shading, snow or product-specific data; expect ±10 % against a detailed tool such as PVGIS. To change the number of panels, their rating, tilt, direction or your roof size, use Blorp's free solar roof tool — every result shows its equation and the numbers used.