Load shedding will be implemented for the fifth time this week, running from 17:00 to 22:00 on Friday, Eskom said in a statement.
However, the utility said, some recovery in generation capacity means it will be stage 1. A "low probability" of load shedding remains over the weekend.
Eskom returned a generating unit to service at Kusile and Majuba power stations, while a unit each at Camden and Kriel power stations were taken offline for repairs.
"Eskom will continue to closely monitor the system with a view to adjusting the stage of loadshedding accordingly," said spokesperson Sikonathi Mantshantsha earlier in the day.
Since Thursday afternoon a generating unit each at the Majuba, Tutuka, Grootvlei, Kriel and Matimba power stations were returned to service.
A total of 2 094MW on planned maintenance, while another 15 997MW of capacity is unavailable due to breakdowns.
Find your load shedding schedule here.