Western Cape Premier Alan WInde warned that Koeberg delays could see the province suffer worse load shedding than the rest of the country.
South African households and businesses are estimated to have installed twice as much solar capacity as Eskom - in just one year.
The City of Ekurhuleni has been failing to implement load shedding as required, so Eskom is taking over.
Power utility Eskom says that load shedding will have to be pushed higher as units stay offline for longer than planned.
Private power producers in South Africa are not happy with the new grid regulations amid the struggle for grid access, while Ramokgopa has said South Africa will prioritise the expansion of its grid over the next decade.
Eskom says that power demand is higher than it anticipated, which has led to an escalation of load shedding.
Eskom has again urged households to delay the recharging of their backup power supplies after load shedding has ended.
Increased energy demand has forced Eskom to escalate load shedding on Friday.
Experts say that a total blackout in South Africa is highly unlikely, even though you can never rule out the possibility.
It's not the ANC but the people of South Africa who benefit from Eskom in state hands, says Public Enterprises minister Pravin Gordhan.