Eskom on Monday announced that Stage 2 and 4 loadshedding will continue to be implemented until further notice.
This was due to increased demand, it said.
Stage 4 loadshedding will be implemented until 05:00 on Tuesday. Thereafter, Stage 2 loadshedding will be implemented from 05:00 until 14:00, followed by Stage 4 loadshedding from 14:00 until 05:00 on Wednesday.
Eskom said this pattern would continue to be implemented daily until further notice.
"Breakdowns are currently at 14 252 MW of generating capacity while the generating capacity out of service for planned maintenance is 4 118 MW," it said.
Over the past 24 hours, a generating unit each at Duvha, Hendrina, Kendal, Kriel, Matimba and Medupi power stations was returned to service. In the same period, a generation unit each at Arnot and Tutuka power stations was taken out of service due to breakdowns.
"The delay in returning to service two generating units at Tutuka power station is contributing to the current capacity constraints. Eskom teams are working around the clock to return the generating units to service."
Eskom appealed to the public to reduce demand and to use electricity sparingly and efficiently, including switching off geysers and pool pumps from 17:00 to 21:00, as this lowers demand and helps in alleviating the pressure on the power system and contributes to lower stages of loadshedding.