Eskom will continue with Stage 3 of workload on Wednesday between 08:00 and 23:00, continuing to struggle with capacity shortages.
The power company announced in an early morning statement that a number of generating units are still not working due to accidents.
According to him, although some units are back in operation as planned, and some fill-ups of diesel fuel, the reserves for water and diesel are still "very low".
The unloading of State 3 allows the disposal of up to 3000 MW of the national grid.
Escom also said he was "concerned about the risk for his operations as a result of the planned national strike on Wednesday by the Kosat union.
COSATU on the strike against job losses is taking place in all provinces, with Western Cape expected on Wednesday. The Western Cape protests will take place on February 19, the day before Finance Minister Tito Mboven is expected to deliver his maiden speech on the budget.