South Africa's power supply remains constrained, Eskom CEO Brian Dames said on Tuesday.
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"This will make it significantly easier to manage the power system during this challenging time, while also enabling us to do planned maintenance to ensure the reliability of our plant," the power utility said in a system status bulletin.
Total demand on Monday evening was forecast to reach 31,392 megawatts. Capacity available to meet the demand was at 34,022MW, including open cycle gas turbines.
Eskom said it continued to make progress with its programme of planned maintenance, but the system "remained tight".
Peak demand for power is between 5pm and 9pm.