According to the information received from Eskom:
On 17 March 2021, Government requested Eskom to suspend load shedding for the duration of King Goodwill Zwelithini’s memorial service on 18 March 2021 from 10:00 to 14:00. The System Operator evaluated the request and concluded that this was technically possible without putting the power system at risk and would not result in a higher stage of load shedding either before or after the memorial service.
The following was taken onto account:
In order to supply the additional demand due to the suspension of load shedding, the System Operator dispatched four additional OCGTs from 09:42 until 14:10. These OCGTs supplied 2 404 MWh (approximately R8.5 million) during this period with a maximum output reaching 610 MW. Furthermore, pumped storage generation was dispatched and supplied an estimated additional 2 240 MWh with a maximum additional capacity of 626 MW dispatched. Between 12:00 and 14:00, four coal-fired generators returned to service adding 1 935 MW of capacity to the system, although it takes many hours to ramp these generators to their maximum capacity.