South Africa's electricity mix in August 2025
In August 2025 South Africa's grid generated 18 566.6 GWh, of which coal supplied 82.8%. Demand averaged 24 268 MW and peaked at 31 694 MW on 7 August 2025.
Total generated18 566.6GWh
Peak demand31 694MW
Renewables share7.5%
Carbon intensity867g/kWh
Unplanned outages9 981MW avg
Load shedding0GWh
Where the electricity came from
| Source | GWh | Share |
|---|---|---|
| Coal | 15 364.7 | 82.8% |
| Wind | 876.6 | 4.7% |
| Nuclear | 696.0 | 3.7% |
| Imports | 530.4 | 2.9% |
| Pumped storage | 388.4 | 2.1% |
| Solar PV | 385.3 | 2.1% |
| Diesel peakers | 119.4 | 0.6% |
| Concentrated solar | 103.9 | 0.6% |
| Hydro | 69.2 | 0.4% |
| Other renewables | 32.6 | 0.2% |
| Total supply | 18 566.6 | 100% |
Load shedding in August 2025
There was no load shedding in August 2025. Separately, contracted industrial customers on interruptible supply were curtailed by 6.3 GWh. That is demand management, not load shedding.
How this month compared
Carbon intensity averaged 867 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 7.5% of generation.
Figures are calculated from Eskom's published hourly data. Rooftop solar sits behind the meter and is not included.