Six years after the first unit began supplying power to the grid, News24 reports that the sixth and last generating unit at South African power utility Eskom’s Medupi coal power station in Lephalale, Limpopo has finally reached commercial operation. Having cost 122-billion-rand so far, Eskom spokesperson Sikonathi Mantshantsha says the power utility expects to spend under 135-billion-rand on completion of the balance of the plant