The Greens will continue to push for extra support for households and businesses ahead of proposed energy relief measures being debated in parliament.
The federal government wants parliament to support a 12-month gas price cap of $12 per gigajoule and a temporary coal price cap of $125 a tonne.
The proposed laws would also set up mandatory "gas market codes" to regulate the supply and purchase of gas.
But it will need the votes of either the coalition or the Greens plus one crossbencher to get the new laws through the Senate.
Prime Minister Anthony Albanese, who has been isolating in Sydney after testing positive to COVID-19 last week, is expected to return to Canberra on Wednesday as he looks to secure support from the Greens and crossbench.
Greens leader Adam Bandt will push for a two-year freeze on power bills and support for businesses and households to replace gas appliances.
Mr Bandt said this could be funded by a windfall tax on coal and gas corporations.
"We want to see more money in people's pockets paid for by making the big coal and gas corporations pay their fair share of tax," he told reporters on Tuesday.
"We want to have some further discussions with the government about the level of support that's going to be provided to people because we're worried that people are going to wind up doing it tough."
Mr Bandt admitted negotiating did not mean everyone got what they wanted, but he was hopeful his talks with the prime minister would result in positive changes to the proposal.
"Does everyone in these discussions end up getting everything they want? Not always," he said.
"Are we able to do something that means people get a bit more money in their pocket than they otherwise would have, and help people reduce their power bills in the long term? I think that's within reach."
He said the minor party does not want to stand in the way of energy relief and was approaching discussions with the government in good faith.
Parliament will meet on Thursday for a special sitting to debate and pass the relief measures before Christmas.
© AAP 2022