Shadow Energy Secretary Caroline Flint has said the cost "burden" of the Government's new energy bill "will fall on bill payers".
Responding to Energy Secretary Ed Davey's statement in the House of Commons, the Labour MP said the move to invest in green power generation would increase costs for consumers.
She said: "It is more important than ever we have energy prices that work in the public interest."
It is the Government's long awaited light bulb moment. The Energy Bill published today envisages changes that would reach into our lives.
By 2020 we will be paying nearly £100 a year more for energy. But whether bills will come down again afterwards is still in dispute.
The coalition will announce plans on updating the energy infrastructure of pylons and power stations, and cutting our reliance on carbon.