Energy future debate: How to stop UK's lights going out
22 May 2012 Last updated at 22:49 BST
Consumers could see an extra £105 per year on their bills by 2030, to help pay for a new generation of nuclear power stations and wind farms.
Ministers say major investment is needed to keep the UK's lights on without pushing up greenhouse gas emissions, but consumer groups are worried.
The BBC's David Shukman reports.