Engineering News 2 November 2010.

State-owned electricity provider Eskom is in the advanced stages of selecting a ‘demand response aggregator’ to facilitate the conclusion of contracts that would enable the power-stressed utility to buy back as much as 500 MW from industry during the 2011 winter peak and beyond…

http://www.engineeringnews.co.za/article/eskom-to-set-up-500-mw-buy-back-scheme-ahead-of-winter-2011-2010-11-02