Industry Structure

Electricity usually moves through five steps from generation to where it's needed in our homes and businesses. The steps below outline how it goes through the various stages to get to you.


Generators produce electricity at various hydro, gas, coal, geothermal and wind plants throughout New Zealand.  


Transpower operates the national grid that transmits the electricity produced by generators. High voltage power lines allow power stations to send electricity around New Zealand. 


Distribution companies (Network or Lines companies), own the lower voltage power lines and distribution networks in local areas.

These connect to the national grid and deliver power to homes and businesses. This is where Westpower fits into the picture.


Electricity Retailers purchase electricity from the wholesale market to sell to residential and business users. 


Customers can buy electricity from any retailer in their area.