Hastings resident Jim Diggle has laid a complaint with the Office of the Electricity and Gas Complaints Commissioner, contending that Unison is charging for a service that they do not supply (the ability to turn off the hot water cylinder) and that Unison is charging too much for wiring because gas requires none.
"This complaint is about unfair and dishonest business practice," he said. "It is not related to costs other than that the unfair practices lead to unjustifiable increased costs for thousands of households."
He is furious his electricity bill will increase because he uses gas rather than electricity for hot-water heating.
Mr Diggle was ineligible for the plan he was on because his hot-water heater was not heated by electricity and could not to be switched off by lines company Unison during power usage spikes.
Mr Diggle buys his electricity from Contact Energy, who told him he was being moved from an "All-Day Economy Plan" to a dearer "Anytime" plan because the all-day plan can "only be applied to properties with electric water heating cylinders or other permanently wired equipment that can be turned off by the network company".