How much electricity do solar panels make in Tianshui, People's Republic of China?
≈ 5,343 kWh a year
In Tianshui, 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 (30°) make about 5,343 kWh of electricity a year — 1,336 kWh for every installed kilowatt.
1,336 kWh/kWpspecific yield per year
30°best yearly panel tilt
1,418 kWh/m²yearly sunlight on level ground
Maybest month (September lowest)
Solar energy month by month in Tianshui
| Month | 4 kWp system (kWh) | per kWp (kWh) |
|---|---|---|
| January | 408 | 102 |
| February | 392 | 98 |
| March | 504 | 126 |
| April | 522 | 131 |
| May | 529 | 132 |
| June | 491 | 123 |
| July | 487 | 122 |
| August | 468 | 117 |
| September | 367 | 92 |
| October | 378 | 95 |
| November | 387 | 97 |
| December | 409 | 102 |
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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