How much electricity do solar panels make in Sendai, Japan?
≈ 4,872 kWh a year
In Sendai, Japan, ten 400 W mono PERC solar panels (4 kWp) on a roof facing the equator at the best yearly tilt (30°) make about 4,872 kWh of electricity a year — 1,218 kWh for every installed kilowatt.
1,218 kWh/kWpspecific yield per year
30°best yearly panel tilt
1,281 kWh/m²yearly sunlight on level ground
Maybest month (December lowest)
Solar energy month by month in Sendai
| Month | 4 kWp system (kWh) | per kWp (kWh) |
|---|---|---|
| January | 317 | 79 |
| February | 346 | 86 |
| March | 458 | 114 |
| April | 494 | 124 |
| May | 511 | 128 |
| June | 463 | 116 |
| July | 424 | 106 |
| August | 451 | 113 |
| September | 404 | 101 |
| October | 386 | 96 |
| November | 330 | 82 |
| December | 289 | 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.