The Coalition has handed down their nuclear costings which show their energy plan would cost Australians $263 billion less than Labor's renewables policy.

Peter Dutton estimates the construction and operation of the seven nuclear plants will deliver net zero by 2050 and cost $331 billion.

Nationals Leader David Littleproud told Peter Fegan on 4BC Breakfast, "There's a better way, there's a cheaper way and there's a more reliable way."

"There's no country of the industrial size of Australia that has gone all renewables, you can't do it, you need a sensible mix," Littleproud said.

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