Teyssen said he will be busy over the next three years with integrating the networks and retail assets of Innogy, E.ON's German rival which it agreed to break up with RWE earlier this year.

"And then I will stop. I have decided not to renew my contract again, eleven years as CEO are enough," Teyssen was quoted as saying by monthly Manager Magazin in an interview published on Thursday.

(Reporting by Christoph Steitz; Editing by Ludwig Burger)