Live mix › Data › September 2023
South Africa's electricity mix in September 2023
In September 2023 South Africa's grid generated 17 425.7 GWh, of which coal supplied 77.7%. Demand averaged 25 666 MW and peaked at 32 889 MW on 13 September 2023.
Where the electricity came from
| Source | GWh | Share |
|---|---|---|
| Coal | 13 543.7 | 77.7% |
| Wind | 1 029.1 | 5.9% |
| Imports | 815.2 | 4.7% |
| Nuclear | 655.9 | 3.8% |
| Solar PV | 424.4 | 2.4% |
| Pumped storage | 388.3 | 2.2% |
| Diesel peakers | 368.1 | 2.1% |
| Concentrated solar | 121.4 | 0.7% |
| Hydro | 67.4 | 0.4% |
| Other renewables | 11.4 | 0.1% |
| Gas | 0.9 | 0.0% |
| Total supply | 17 425.7 | 100% |
Load shedding in September 2023
Eskom shed 1 508 GWh of demand across 591 hours, affecting 30 of the 30 days in the month. The heaviest single day was 13 September 2023, when 107.3 GWh was shed. Separately, contracted industrial customers on interruptible supply were curtailed by 6.4 GWh. That is demand management, not load shedding.
How this month compared
Carbon intensity averaged 825 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 9.0% of generation.
Figures are calculated from Eskom's published hourly data. Rooftop solar sits behind the meter and is not included.