Eskom has announced that Kusile Unit 4, in eMalahleni, Mpumalanga, has entered into commercial operation, adding some 800 MW of much-needed generation capacity to South Africa’s load-shedding-prone electricity system. The unit is the fourth of six units to enter commercial operation at the much-delayed 4 800-MW project, where design defects have also negatively affected the performance of the units that have been connected previously.