How much electricity do solar panels make in Pietermaritzburg, South Africa?
≈ 6,388 kWh a year
In Pietermaritzburg, South Africa, ten 400 W mono PERC solar panels (4 kWp) on a roof facing the equator at the best yearly tilt (30°) make about 6,388 kWh of electricity a year — 1,597 kWh for every installed kilowatt.
1,597 kWh/kWpspecific yield per year
30°best yearly panel tilt
1,726 kWh/m²yearly sunlight on level ground
Julybest month (February lowest)
Solar energy month by month in Pietermaritzburg
| Month | 4 kWp system (kWh) | per kWp (kWh) |
|---|---|---|
| January | 540 | 135 |
| February | 504 | 126 |
| March | 554 | 138 |
| April | 509 | 127 |
| May | 541 | 135 |
| June | 515 | 129 |
| July | 560 | 140 |
| August | 559 | 140 |
| September | 543 | 136 |
| October | 527 | 132 |
| November | 507 | 127 |
| December | 529 | 132 |
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.