About 3, 170 Megawatts (MW) of electricity are expected to return to the grid on Tuesday evening.
Eskom said this move is expected to further stabilise an otherwise, strained system, worsened by colder weather.
Eskom’s Daphne Mokwena, said while occasional system constraints occur, adequate emergency reserves are in place and are being deployed to support demand during morning and evening peak periods.
“Eskom confirms that there is sufficient supply to meet electricity demand over the upcoming long weekend” she said.
This week’s Planned Capability Loss Factor (PCLF) (6 to 12 June) hovered around ~4 087MW.
As a result, the Energy Availability Factor (EAF) is between 60% and 64%.
For the financial year-to-date, planned maintenance has averaged at 5 793MW, representing 12.36% of total generation capacity. This reflects a decrease from the previous week, but a 1.6% increase compared to the same period last year.
The Unplanned Capacity Loss Factor (UCLF), which measures the capacity lost due to unplanned outages, stands at 29.05% for the financial year to date (1 April to 12 June 2025).
Mokwena said the rise in unplanned outages can be attributed to delays in returning units from planned maintenance, amounting to 1 800MW, including 800MW from Medupi Unit 4 since 1 June 2025.
This week’s higher unplanned outages continue to include the 800MW delay in returning Medupi Unit 4, which is coming from a long-term recovery project.