How much electricity do solar panels make in Kaifeng, People's Republic of China?
≈ 5,000 kWh a year
In Kaifeng, People's Republic of China, ten 400 W mono PERC solar panels (4 kWp) on a roof facing the equator at the best yearly tilt (25°) make about 5,000 kWh of electricity a year — 1,250 kWh for every installed kilowatt.
1,250 kWh/kWpspecific yield per year
25°best yearly panel tilt
1,366 kWh/m²yearly sunlight on level ground
Maybest month (January lowest)
Solar energy month by month in Kaifeng
| Month | 4 kWp system (kWh) | per kWp (kWh) |
|---|---|---|
| January | 337 | 84 |
| February | 338 | 85 |
| March | 482 | 120 |
| April | 495 | 124 |
| May | 520 | 130 |
| June | 472 | 118 |
| July | 449 | 112 |
| August | 444 | 111 |
| September | 402 | 100 |
| October | 378 | 95 |
| November | 339 | 85 |
| December | 347 | 87 |
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.
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