Former prime minister Paul Keating has blasted Opposition Leader Peter Dutton over his plan to power Australia with nuclear energy.
Mr Keating lashed out at Mr Dutton on Sunday, calling him a "peddler of danger".
"A denialist now seeking to camouflage his long held denialism ... By his blatant opposition to renewables, Dutton calls into question and deprecates all the government has done to provide Australian business with a reliable and dependable framework for investment in renewables," he wrote.
The political fight over energy policy is set to continue when Parliament resumes on Monday to kick of a two-week sitting.
The Albanese government will introduce the first tranche of its Future Made in Australia legislation, to implement its $22.7 billion plan to boost renewable projects and turn Australia into a clean energy superpower over the coming decade.
Environment Minister Tanya Plibersek said leader Peter Dutton's energy plan would "put us on the slow lane when it comes to renewables".
"He's saying to Australians ... we're going to slam the brakes on renewables, we're going to move to nuclear instead," she told Sky on Sunday.
"And they've done it without a costing ... It's just mad."
Mr Dutton faces divisions within the Coalition over what role should be played by renewable energy sources like wind, solar and batteries under his nuclear-powered energy plan.
This raises questions about how he would prevent blackouts as ageing coal-fired power plants gradually produce less energy.
Opposition climate change and energy spokesman Ted O'Brien told ABC's Insiders the government's target of reaching 82 per cent renewables on Australia's energy grid by 2030 was unrealistic.
He would not say what proportion of renewables would be part of the Coalition's nuclear plan.
"You will see a balanced mix," Mr O'Brien said.
"We support the continuation of rolling out renewables [but] we're different from the government [who want to] maximise the amount of renewables on the grid. They want the maximum amount. We want the optimum amount."
Mr O'Brien revealed the Coalition would seek multiple reactors on each of the seven sites earmarked for nuclear plants, saying: "That's how to get costs down."
An independent nuclear energy coordinating authority would make recommendations on where to build reactors, with the minister to make a final decision, he said.
Ms Plibersek, who has approved more than 50 renewable energy projects as minister, said Australia was "well set up for renewables".
She cited hydro-powered Tasmania as examples of a near-100-per-cent renewable state.
The ACT has 100 per cent net renewable energy, although this is partially achieved using offsets.
The Smart Energy Council says building seven nuclear reactors could cost up to $600 billion, with $116 billion paid by taxpayers, and deliver "at best" just 3.7 per cent of energy needs.
