South Africa saved R4 billion ($310 million) in fuel and by avoiding blackouts in the first half of 2015 due to renewable-energy projects, according to a study by the Council for Scientific and Industrial Research.
From January to June, 800 megawatts of wind and 1 gigawatt of solar photovoltaic power-generation saved about R3.6 billion in diesel and coal-fuel costs, according to the Pretoria-based center. During 15 days in the period, renewables either prevented or limited rolling blackouts, the study showed.

South Africa’s state-owned power company Eskom has imposed rolling blackouts almost every other day this year as it struggles to meet demand. The government’s five-round program of clean-energy tenders has awarded more than 5 000 megawatts of projects since 2011.

Source: http://www.moneyweb.co.za/news/south-africa/renewable-benefits-seen-at-r4bn-in-2015/