The campaign, created by DLKW Lowe, will launch on 8 November.
Broadbent will voice one of a pair of animated mice who will challenge consumers to get Energy Fit.
A new website will provide personalised energy efficiency advice with tools allowing users to enter detailed information on energy use.
The fully integrated second phase of the campaign will cover direct marketing, social media and internal comms.
E.on is also sponsoring the FA Cup, which will be taken on a tour of key UK cities accompanied by ’Energy Fit’ squads.
Jeremy Davies, UK director of brand and communications at E.on says: “Our customers have been telling us that they don’t just want to be told that they should save energy but want to be given the tools and know-how to do it.
“That’s why we have launched this campaign; to spread the ’Energy Fit’ message and continue the conversation with them.”
Media planning and buying was handled by Mediacom.
This story first appeared on Pitch, Centaur’s subscription-based online interactive marketplace for agencies and clients to share news, opinion and debate.