The E.ON Energy Fit Experience, created by experiential agency RPM, ties in with the brand's sponsorship of the FA Cup.
E.ON is contacting 7,000 customers in London and Nottingham through direct marketing activity to offer them VIP passes to the activity and the opportunity to win football and energy saving prizes.
The activity features a large "big boil" kettle, which highlights the number of kettles turned on during half-time in the FA Cup. It reveals the potential monetary and energy savings that could be made if consumers only boil as much water as they need.
There is also an "energy converter" at the event, which calculates what consumers could buy with the money saved on their power bills. E.ON energy experts will be on hand to speak to directly and visitors will have the opportunity to meet FA Cup football personalities.
Phil Boas, head of sponsorship, E.ON, said: "E.ON is challenging the way consumers see energy companies. Instead of a hard sell, we want to educate and empower consumers to become more 'energy fit', no matter who their energy supplier is.
"We want to give them the tools and the advice they need in order to save on their energy bills. We tasked RPM with devising a creative and different approach this year that incorporated our FA Cup sponsorship."
The activity launched in London over the weekend and will take place in Nottingham between 8 and 10 April.
In January, E.ON became the first brand that uses sampling channel Home Move Box to make follow-up calls to its recipients about the box, which contains a power-down plug.