This compares with the 3.5GW currently connected to the country's 100,000km national grid.

The projection was made by Brazil's Mines and Energy Ministry in the country's 10-year energy expansion plan, which is reviewed every year.

Of the total, 5.4GW will be built by the end of 2015 based on projects already commissioned at auctions in recent years. By the same measure, by the end of 2018, 10GW of new wind will have been built.

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