Household energy prices are expected to fall more than $150 from July 1, but this could be jeopardised by any further delays to major projects, according to the industry.

Household power bills will drop by about 7 per cent, while business bills will drop by 8 per cent from July 1.

Household energy prices are expected to fall more than $150 from July 1, but this could be jeopardised by any further delays to major projects, according to the industry.