How much electricity do solar panels make in Fukuoka, Japan?
≈ 5,065 kWh a year
In Fukuoka, Japan, ten 400 W mono PERC solar panels (4 kWp) on a roof facing the equator at the best yearly tilt (25°) make about 5,065 kWh of electricity a year — 1,266 kWh for every installed kilowatt.
1,266 kWh/kWpspecific yield per year
25°best yearly panel tilt
1,397 kWh/m²yearly sunlight on level ground
Maybest month (December lowest)
Solar energy month by month in Fukuoka
| Month | 4 kWp system (kWh) | per kWp (kWh) |
|---|---|---|
| January | 305 | 76 |
| February | 345 | 86 |
| March | 469 | 117 |
| April | 502 | 125 |
| May | 521 | 130 |
| June | 429 | 107 |
| July | 459 | 115 |
| August | 507 | 127 |
| September | 435 | 109 |
| October | 440 | 110 |
| November | 354 | 88 |
| December | 299 | 75 |
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.