Live mix › Data › December 2025
South Africa's electricity mix in December 2025
In December 2025 South Africa's grid generated 16 411.1 GWh, of which coal supplied 70.1%. Demand averaged 21 444 MW and peaked at 26 851 MW on 4 December 2025.
Where the electricity came from
| Source | GWh | Share |
|---|---|---|
| Coal | 11 506.2 | 70.1% |
| Nuclear | 1 406.8 | 8.6% |
| Wind | 1 078.2 | 6.6% |
| Imports | 793.5 | 4.8% |
| Solar PV | 594.9 | 3.6% |
| Hydro | 370.4 | 2.3% |
| Pumped storage | 348.7 | 2.1% |
| Concentrated solar | 193.1 | 1.2% |
| Diesel peakers | 95.3 | 0.6% |
| Other renewables | 24.0 | 0.1% |
| Total supply | 16 411.1 | 100% |
Load shedding in December 2025
There was no load shedding in December 2025. Separately, contracted industrial customers on interruptible supply were curtailed by 2.3 GWh. That is demand management, not load shedding.
How this month compared
Carbon intensity averaged 734 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 11.5% of generation.
Figures are calculated from Eskom's published hourly data. Rooftop solar sits behind the meter and is not included.