Contact Energy has contracted Vector subsidiary Advanced Metering Services to install smart meters for up to 150,000 North Island customers over the next three years.
Contact says the meters will mean an end to estimated bills and allow customers to gain access to more detailed information about electricity use.
The company is not disclosing the value of the contract with AMS.
New Electricity Authority regulations require meters to meet tougher standards by April 2015.
Contact's general manager of retail, Ruth Bound, said that smart meters provided an immediate benefit to customers because they electronically transmitted electricity use data directly to the company.