Energy Secretary Ed Davey will set out fresh proposals to slash demand for electricity as he publishes a blueprint for energy that critics say will massively increase households bills.
The long-delayed Energy Bill, formally published today, authorises ministers to almost treble investment in "green" power generation to £7.6 billion, up from £2.35 billion this year.
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.