Eskom said the possibility of load shedding over the weekend was high despite lower demand during this period.
In a statement on Friday, Eskom said there was currently a severe lack of supply.
"Generation plant is out on planned maintenance and there is a higher than expected number of units (currently at approximately 10,000 MW) on unplanned maintenance due to technical faults," it said.
"Cahora Bassa hydropower plant is still supplying 700 MW less to the grid as a result of a damaged transmission line, which occurred late on Wednesday," the power utility said.
Eskom is also facing maintenance backlogs and coal shortages. It implemented Stage 1 load shedding on Thursday and has warned that the country will likely see more planned outages for the remainder of the year.
- African News Agency (ANA)
