How much electricity do solar panels make in San Francisco, United States?
≈ 6,726 kWh a year
In San Francisco, United States, ten 400 W mono PERC solar panels (4 kWp) on a roof facing the equator at the best yearly tilt (30°) make about 6,726 kWh of electricity a year — 1,682 kWh for every installed kilowatt.
1,682 kWh/kWpspecific yield per year
30°best yearly panel tilt
1,782 kWh/m²yearly sunlight on level ground
Junebest month (December lowest)
Solar energy month by month in San Francisco
| Month | 4 kWp system (kWh) | per kWp (kWh) |
|---|---|---|
| January | 400 | 100 |
| February | 439 | 110 |
| March | 580 | 145 |
| April | 640 | 160 |
| May | 685 | 171 |
| June | 685 | 171 |
| July | 669 | 167 |
| August | 647 | 162 |
| September | 612 | 153 |
| October | 564 | 141 |
| November | 440 | 110 |
| December | 364 | 91 |
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.