PVGIS · SolarMapped
Solar potential in Cape Town
This estimate represents one coordinate near the city center, not every roof or neighborhood.
Explore on the solar map ↗Annual values
PV output is estimated electricity from 1 kWp of installed solar panels. Irradiation is sunlight energy received per square meter on the optimally tilted panel plane; it is not electricity.
For a 5 kWp system, multiply the electricity values by five. This simple scaling does not account for roof-specific shading or equipment constraints.
Compared with the sampled-city benchmark: -0.4% (1,733kWh/kWp/year). These figures are the unweighted mean of the city locations listed below, not a national average. Two urban points do not represent an entire country, its roofs or its solar installations.
Monthly solar irradiation and PV output
Highest-output month: January · 182.8kWh/kWp/month. Lowest-output month: June · 90.4kWh/kWp/month.
| Month | Estimated PV output (kWh/kWp/month) | Solar irradiation (kWh/m²/month) |
|---|---|---|
| January | 182.8 | 235.7 |
| February | 165.9 | 213.3 |
| March | 165.5 | 210 |
| April | 139.2 | 173.6 |
| May | 106.5 | 131.3 |
| June | 90.4 | 109.8 |
| July | 104.5 | 126.7 |
| August | 119.4 | 145.9 |
| September | 136.5 | 168.8 |
| October | 166.5 | 209.6 |
| November | 168.6 | 214.4 |
| December | 180.5 | 232 |
More cities in South Africa
Data and methodology
PVGIS 5.3 (European Commission Joint Research Centre), crystalline silicon, fixed free-standing installation, 1 kWp, 14% system losses, equator-facing panels with optimized tilt and the terrain horizon. Long-term climate estimates are not a forecast or a roof survey. Nearby buildings, trees, roof constraints, snow and local conditions can change actual output.
- Cape Town — Reference coordinates: -33.92, 18.42; Climate dataset / years: PVGIS-SARAH3 / 2005–2023; Data retrieved: .
PVGIS methodology · Sources and assumptions (English) · Download the underlying data (JSON)