MPs have accused the Treasury of making the government’s clean energy revolution unworkable and creating the risk of higher household bills.
They said Treasury changes to the draft Energy Bill will increase the risk of borrowing for investors.
They added that it would put up the cost of renewable and nuclear power, with customers bearing the extra cost.
A Treasury spokesman said the aim was to achieve government goals while protecting businesses and consumers.
Tim Yeo, chairman of the energy and climate change select committee, said: “The Treasury has clearly intervened in the draft bill in a way that will put up bills to consumers and put off investors by increasing their risks.