Eskom has implemented stage one load shedding which is expected to last until 9 am on Sunday morning.
Stage 2 will then kick in from 9 am until 11 pm on Sunday.
Eskom has been implementing rolling blackouts across the country, saying they are necessary to create capacity to replenish water reserves.
Rotational power cuts were implemented since Thursday when Eskom lost several generating units.
The power utility has also attributed the power cuts to wet coal.