Coming into force from December 3rd, the decision is the electricity supplier's final move to phase out the use of the brand name in the UK since its takeover of the company in 2002.
Discussing the move, the energy company's managing director Graham Bartlett said the phasing out of the brand signalled E.ON's commitment to the UK.
He added: "We want to change energy for the better - where it comes from, how we get it to you and helping you to use it more efficiently - which is why we're launching a series of new ways to do all of these things."
E.ON's announcement on its decision to drop the Powergen brand has come after the company had its plans for a new gas-fired power station approved by the Department of Business, Enterprise and Regulatory Reform.
The plant, which will be built in Derbyshire, is expected to be up and running by 2011.
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