About Empower Empower is an electricity retailer that aims to provide New Zealand households and businesses with a competitive supply of electricity. Empower Ltd was established in 1998 following the deregulation of the New Zealand electricity market. The Government passed legislation to create a free market for electricity supply in New Zealand. Our goals are to bring an approachable, cost-effective face to electricity supply. To find out how Empower is making a difference, call us on 0800 34 00 00 7am to 9pm weekdays and 8am to 5pm on Saturdays.