The Morrison government is promising to cut power prices by 25 per cent, saving the average household up to $185 a year.

Energy Minister Angus Taylor will on Friday vow to reduce the spot price in the national electricity market to less than $70 per Megawatt-hour by the end of 2021.

The savings are less than those promised under the coalition’s dumped National Energy Guarantee, which the government claims would have driven prices down by $550.