Power companies are offering some of their best deals door-to-door as competition intensifies for electricity customers.
Consumer NZ chief executive Suzanne Chetwin said the intense competition was good for consumers, even though one company, Genesis, recently pulled out of door-to-door sales.
"I also think what's happening a little bit is that when people do decide to switch the losing retailer contacts them and offers them a deal to stay," she said.
Electricity Authority chief executive Carl Hansen on Monday urged people to check whether they were getting the best deal available.
"Winter is a good time to check again since everyone tends to use more power over the colder months," Mr Hansen said.