Brazilian energy regulator Aneel has concluded the 20-year energy supply contracts with companies that will invest €1.33bn and commence operations to feed the national grid in 2017.

Reuters cited the government’s energy research company EPE head Mauricio Tolmasquim as saying: "This auction is a mark, not only because it signals the entrance of solar power in the Brazilian energy mix, but because it was one of the most competitive to date."

"This is one of the lowest prices for solar energy in the world," Tolmasquim said.

The auction, which lasted for over eight hours, saw the final price of solar power settling at around 220 reais ($89) per megawatt-hour, which is less than 18% of initial price of 262 reais ($106) set by the government.