The company has a generating capacity of 10,050 MW which corresponds to 10% of Brazil's electrical production.

The company was founded on February 28, 1957, to support the fast-pace of urbanization in Brazil during the 1950s.

Their effective operation began in 1963 and in 1971, their headquarters moved to Rio de Janeiro.

Out of their 10,050 MW installed capacity, 7,971 is owned by them and the rest through partnerships.

They supply 97% of the electricity in Brasília, 92% in Rio de Janeiro, 91% in Mato Grosso, 81% in the Espírito Santo, 61% in Goiás, 58% in São Paulo, Minas Gerais 45% and 16% in Tocantins.