EU state aid regulators on Monday ordered Germany to recover millions of Euros from a number of large electricity users.
The electricity users enjoyed unfair advantage after they had been exempted from paying network charges between 2012 and 2013.
The European Commission in charge of ensuring a level playing field in the 28-country EU, said the exemption increased the financial burden on other power users who had to pay a special levy introduced in 2012.
The EU competition enforcer said the exemption, which Germany scrapped in 2014, was given to companies.
These companies used more than 10GW hours between 2011 and 2013. The cost for 2012 alone came to 300 million Euros (350 million dollars).