Npower is the latest energy supplier to announce it has met all its targets under energy efficiency schemes Cert and Cesp, subject to verification by Ofgem. Of the big six, only Scottish Power and British Gas have yet to reveal whether they hit the targets by the 31 December deadline.
Npower added its voice to calls on government to cap the cost of replacement scheme the Energy Company Obligation (Eco). The Department of Energy and Climate Change expects Eco to cost the industry £1.3 billion, however Npower warned Cert and Cesp had shown costs could significantly exceed forecasts.
Simon Stacey, managing director of Npower energy services, said: "I am very concerned about the impact on customers' bills. To ensure that we do not have an open-ended commitment which could significantly increase bills, we are calling on DECC (Department of Energy and Climate Change) to cap the cost of Eco at £1.3bn.