South Africa's electricity mix in March 2025
In March 2025 South Africa's grid generated 18 427.2 GWh, of which coal supplied 80.6%. Demand averaged 24 223 MW and peaked at 29 555 MW on 19 March 2025.
Where the electricity came from
| Source | GWh | Share |
|---|---|---|
| Coal | 14 856.5 | 80.6% |
| Wind | 721.6 | 3.9% |
| Diesel peakers | 687.9 | 3.7% |
| Imports | 628.4 | 3.4% |
| Nuclear | 523.1 | 2.8% |
| Solar PV | 406.4 | 2.2% |
| Pumped storage | 379.1 | 2.1% |
| Concentrated solar | 104.4 | 0.6% |
| Hydro | 92.5 | 0.5% |
| Other renewables | 24.0 | 0.1% |
| Gas | 3.2 | 0.0% |
| Total supply | 18 427.2 | 100% |
Load shedding in March 2025
Eskom shed 95 GWh of demand across 55 hours, affecting 5 of the 31 days in the month. The heaviest single day was 8 March 2025, when 49.1 GWh was shed. Separately, contracted industrial customers on interruptible supply were curtailed by 7.6 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 6.7% of generation.
Figures are calculated from Eskom's published hourly data. Rooftop solar sits behind the meter and is not included.