How much electricity do solar panels make in Seongnam-si, South Korea?
≈ 5,418 kWh a year
In Seongnam-si, South Korea, ten 400 W mono PERC solar panels (4 kWp) on a roof facing the equator at the best yearly tilt (30°) make about 5,418 kWh of electricity a year — 1,355 kWh for every installed kilowatt.
1,355 kWh/kWpspecific yield per year
30°best yearly panel tilt
1,403 kWh/m²yearly sunlight on level ground
Maybest month (November lowest)
Solar energy month by month in Seongnam-si
| Month | 4 kWp system (kWh) | per kWp (kWh) |
|---|---|---|
| January | 404 | 101 |
| February | 421 | 105 |
| March | 533 | 133 |
| April | 526 | 131 |
| May | 548 | 137 |
| June | 479 | 120 |
| July | 393 | 98 |
| August | 435 | 109 |
| September | 444 | 111 |
| October | 477 | 119 |
| November | 378 | 95 |
| December | 380 | 95 |
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.