Lungela Vongu, dressed in a safety harness and hard, hat works on the top of wind tower. The Cookhouse Wind Farm in the Eastern Cape of the country is the biggest in Africa. It was built in only 11 months, and has 66 turbines generating 138 Mw of clean power. Renewable energy in South Africa now ccount for about 1/10th of the country’s electricity supply after only three years of implementation.