Opposition Leader Sussan Ley has all but ruled out building new coal-fired power stations under her party's energy policy, in a dramatic shift in language.

The coalition argues its primary focus would be bringing down power prices if it wins the next election, despite experts warning its move to abandon climate goals will only drive up costs.

Since announcing the Liberal party's new policy last week, Ms Ley and her energy spokesman Dan Tehan have left the door open to subsidising new coal generators.

But in fresh remarks, Ms Ley says while the plan could support new coal power stations "in theory," it would be highly unlikely in practice unless they stack up financially.

"We won't be building coal-fired power stations and there are no proposals for new coal," she told the ABC's 7.30 pr

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