Power companies are offering some of their best deals door-to-door as competition intensifies for electricity customers.
Manurewa residents Logan and Jenny Williams are saving almost $30 a month by accepting a special deal from a Mercury Energy salesman that cuts their fixed charge from $1 to 10c a day.
"Someone came round doorknocking ... He sold me a pretty good pitch so I let him into the house and loaded up the computer so we could compare deals," said Mr Williams, 25.
"I think they gave me $50 off my first bill to sign up, and [their previous supplier] paid back our $150 bond, so that was $200. They did everything for me ..."
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.