The Mexican steelmaker plans to become fully self-sufficient by investing in a series of generation plants powered by natural gas and methane from its coal mines.
The growth in electric energy consumption in the interconnected system (SIN) is now expected to be below 1% in 2017.
The group is banned from taking part in public power sector auctions for failing to comply with contract obligations involving several thermoelectric plants.
Leaked documents reveal the utility has a reinsurance subsidiary in the Bahamas, as the company argues that this information has been public and the Bahamas do not classify as tax haven.
The project was approved amid protests from the opposition and even physical confrontations.