Live mix › Data › September 2025
South Africa's electricity mix in September 2025
In September 2025 South Africa's grid generated 17 178.9 GWh, of which coal supplied 82.7%. Demand averaged 23 133 MW and peaked at 28 572 MW on 8 September 2025.
Where the electricity came from
| Source | GWh | Share |
|---|---|---|
| Coal | 14 211.0 | 82.7% |
| Wind | 906.8 | 5.3% |
| Nuclear | 668.6 | 3.9% |
| Pumped storage | 408.6 | 2.4% |
| Solar PV | 392.0 | 2.3% |
| Imports | 333.4 | 1.9% |
| Concentrated solar | 105.9 | 0.6% |
| Diesel peakers | 65.8 | 0.4% |
| Hydro | 57.9 | 0.3% |
| Other renewables | 29.0 | 0.2% |
| Total supply | 17 178.9 | 100% |
Load shedding in September 2025
There was no load shedding in September 2025. Separately, contracted industrial customers on interruptible supply were curtailed by 3.1 GWh. That is demand management, not load shedding.
How this month compared
Carbon intensity averaged 865 grams of CO₂ per kilowatt-hour, against a world average of 458 g/kWh in 2025 and an Africa average of about 530 g/kWh. Renewables (wind, solar PV, CSP and other renewables reporting to Eskom) supplied 8.3% of generation.
Figures are calculated from Eskom's published hourly data. Rooftop solar sits behind the meter and is not included.