First minister John Swinney has accused the UK Labour government of "hoodwinking" the public about the ability of GB Energy to bring down people's bills.
His comments come after the state-owned energy firm's chairman, Juergen Maier, could not give a timeframe for energy bills coming down during an interview with Sky News.
He said: "I know that you are asking me for a date as to when I can bring that, but GB Energy has only just been brought into creation and we will bring energy bills down."
But reacting to the news, My Swinney criticised the UK government, accusing Labour of "not delivering" for householders.
The Scotsman reports the first minister said: “I very much support the steps that have been taken by GB Energy, but I think the problem that we’ve got is that the Labour party, the Labour government, promised something that GB Energy is not able to deliver.
“They’ve been hoodwinking the public about this point. People were promised lower fuel bills because of GB Energy.
"The chairman of GB Energy told the media that won’t be able to be realised for some considerable time to come.”
Russell Borthwick, chief executive of Aberdeen and Grampian Chamber of Commerce, said the energy sector needed “more confidence that things are going to start moving more quickly”.
He added: "What we do have is not a great deal of progress. We've had a lot of positive meetings with GB Energy. I think we are really looking over the next six months for that to be delivered on."
In the Sky News interview, Mr Maier also clarified that the expected 1,000 new jobs GB Energy would create in Aberdeen could take up to 20 years to achieve.