How much electricity do solar panels make in Sakai, Japan?
≈ 5,156 kWh a year
In Sakai, Japan, ten 400 W mono PERC solar panels (4 kWp) on a roof facing the equator at the best yearly tilt (25°) make about 5,156 kWh of electricity a year — 1,289 kWh for every installed kilowatt.
1,289 kWh/kWpspecific yield per year
25°best yearly panel tilt
1,403 kWh/m²yearly sunlight on level ground
Maybest month (December lowest)
Solar energy month by month in Sakai
| Month | 4 kWp system (kWh) | per kWp (kWh) |
|---|---|---|
| January | 331 | 83 |
| February | 353 | 88 |
| March | 475 | 119 |
| April | 505 | 126 |
| May | 528 | 132 |
| June | 453 | 113 |
| July | 475 | 119 |
| August | 516 | 129 |
| September | 433 | 108 |
| October | 416 | 104 |
| November | 352 | 88 |
| December | 321 | 80 |
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.