The nation’s largest electricity user is questioning how it’ll keep its Tomago aluminium smelter running under Labor’s 50 per cent renewables target.

A federal Labor government has declared it would spend $15 billion on “fixing” the national energy network and subsidise 100,000 household batteries.

But Tomago Aluminium CEO Matt Howell says “batteries are not a solution”.

“Eight minutes, that’s all it will power us for,” he tells Ray Hadley.

“It’ll be like trying to tow an oil tanker with a canoe.”

Mr Howell says Labor proposing the scheme is “quite frankly, a distraction”.

“If we had a secure and stable grid, you wouldn’t need them in the first place.”

Click PLAY below to hear the full interview