Bosses say they want to expand but need to know what the government's future green policies will be.
Adura says the UK government must approve North Sea production urgently to avoid domestic supply shortages.
Typical annual household bills rose by 13% under Ofgem's new energy cap which took effect on 1 July.
Household energy prices have risen by 13% a year as regulator Ofgem's latest price cap kicks in.
The Scottish government will have the final say on the proposed Spiorad na Mara project.
Paul Ashworth says energy from the offshore wind farm will be able to power 3.3 million homes.
Experts say support is available as total debt and arrears to suppliers hit a new record.
Objectors say the project will increase flood risk and spoil the scenery near a stately home.
Chipping Norton residents have criticised a planned power cut as a red heat warning is in place.
