The 'Thank yous' marketing strategy will involve every customer receiving a membership card, featuring a unique code that can be entered into a microsite each month for a chance to win a prize.
Dual fuel customers can enter into the prize draw twice each month, and customers without the internet can enter by telephone.
Additional prizes will include rides on the EDF Energy-sponsored London Eye with Olympic gold medal-winning rower James Cracknell, a £10,000 energy efficiency home-makeover, family days out, two-for-one offers, high-street discount vouchers, and London 2012 merchandise.
The initiative comes at a time when the energy industry is under fire from industry regulator Ofgem, as well as politicians including energy secretary Chris Huhne and opposition leader Ed Miliband, who slammed the "rigged" energy market.
EDF Energy is running a television campaign, created by AMV BBDO, to support the scheme, featuring everyday people parodying Olympians winning gold.
Archibald Ingall Stretton created the campaign website and was responsible for email creative and bill inserts.
At a Westminster summit yesterday (17 October), the Government, consumer groups, energy suppliers, and industry regulator Ofgem agreed a range of measures to help consumers save money on their gas and electricity bills, and discussed policy developments aimed at keeping household energy bills down.
Follow Matthew Chapman on Twitter @mattchapmanuk
This article was first published on marketingmagazine.co.uk