Residential electricity prices rose again on average in 2014, outstripping inflation and pushing up the cost of living.
Last month the Green Party released figures showing Kiwis are spending more of the pay packets on electricity, saying power bills make up 3.5 percent of expenditure this year.
Green Party energy spokesperson Gareth Hughes says power prices have gone up 25 per cent in six years, despite a 10 per cent drop in demand over the same time period.
The Government has rejected claims that the electricity market is failing, pointing out the large number of power supply companies available, giving people more chance to shop around.