13 June 2013 - For the first time since Eskom began providing twice weekly updates on the state of its system, it indicates that peak electricity demand has exceeded available supply. This was according to Eskom’s update on the 13th of June, when it reported an expected peak demand of 35,364 MW for that evening versus an available supply capacity including open cycle gas turbines of 34,970 MW.

This means that for those peak periods Eskom has to invoke interruptible load reduction plans. This includes 2,000 MW of interruptible load reduction which is available from the BHP Billiton aluminium smelters, in terms of the agreements Eskom has with BHP Billiton, as well as demand market participation agreements with other large customers.