South Africa's electricity mix in June 2025
In June 2025 South Africa's grid generated 19 111.5 GWh, of which coal supplied 81.0%. Demand averaged 25 734 MW and peaked at 31 786 MW on 23 June 2025.
Total generated19 111.5GWh
Peak demand31 786MW
Renewables share8.0%
Carbon intensity855g/kWh
Unplanned outages14 792MW avg
Load shedding0GWh
Where the electricity came from
| Source | GWh | Share |
|---|---|---|
| Coal | 15 470.8 | 81.0% |
| Wind | 1 108.3 | 5.8% |
| Nuclear | 679.7 | 3.6% |
| Imports | 524.8 | 2.7% |
| Pumped storage | 447.4 | 2.3% |
| Solar PV | 329.0 | 1.7% |
| Diesel peakers | 283.6 | 1.5% |
| Hydro | 171.8 | 0.9% |
| Concentrated solar | 69.3 | 0.4% |
| Other renewables | 26.2 | 0.1% |
| Gas | 0.6 | 0.0% |
| Total supply | 19 111.5 | 100% |
Load shedding in June 2025
There was no load shedding in June 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 855 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 8.0% of generation.
Figures are calculated from Eskom's published hourly data. Rooftop solar sits behind the meter and is not included.