Nearly 128,000 households switched energy suppliers in the 12 months to August 30, a figure the Electricity Authority says is almost 50 per cent higher than during the same period in 2010.
It's attributing the jump to a campaign launched in May this year which shows how much consumers can save by switching to cheaper suppliers, with details of offers and a calculator on its Powerswitch website.
The authority's annual report, released on Tuesday, shows 398,447 people visited the website and the number of completed switches was 127,966.
"The campaign aim, to empower consumers, has been a success with a growing appreciation of how simple and effective the process is to switch electricity providers," the report says.
"This in turn increases competition within the industry."
NZN