A split has emerged between the federal and NSW coalition governments over a national plan to cap gas and coal prices.
The plan agreed by state and territory leaders on Friday will see gas capped at $12 a gigajoule and coal at $125 a tonne for 12 months to ease bill shock on households.
But federal opposition energy spokesman Ted O'Brien has described it as a "monster in the making" that will fail, while NSW Premier Dominic Perrottet has thrown his support behind the cap plan.
Mr Perrottet said the federal coalition's anger at the plan was "a matter for them".
"People have different opinions all the time and that's fine, I welcome debate but what I know is the agreement we struck ... ensures that we put downward pressure on household bills," Mr Perrottet said.
The federal opposition has also lamented the lack of coal and gas supply, which it says is the answer to rising household energy bills.
Mr Perrottet pointed to his government's approval this week of oil and gas giant Santos's controversial Narrabri project.
He said part of that approval will see a domestic gas reserve set up in NSW.
"That's a significant long term solution," Mr Perrottet said.
Federal Energy Minister Chris Bowen has spent the weekend dismissing criticism of the new plan by power companies.
He told Sky News that suggesting companies could not profit off the caps was "ridiculous".
"I don't think that argument is going to hold any water," Mr Bowen said.
Global factors like the war in Ukraine have seen fossil fuel costs soar internationally, with Australian-produced gas and coal able to fetch record prices overseas.
But this has also meant Australian households have been forced to pay higher energy prices as it costs generators more money to keep the lights on.
