Energy - Electricity consumption and line losses in Gigawatt hours 1974–2018

Ministry of Business, Innovation, and Employment


An ICP is a physical point of connection on a local network or an embedded network that the distributor nominates as the point at which a retailer will be deemed to supply electricity to a consumer.
1 Gigawatt hour (GWh) = 0.0036 Petajoules (PJ).
The Ministry has improved its method for calculating annual electricity consumption. Previously, weightings were calculated using grid export demand data from the Electricity Authority and applied to March year consumption data collected by the Ministry to calculate both quarterly and calendar year figures. This is referred to as the “historically consistent methodology”.
The Ministry now directly collects them on a quarterly basis. This means that actual calendar year data is available for 2014 onwards, referred to as the “new methodology”.
This does not include data for smaller retailers whose market share has increased in recent years. The Ministry is currently investigating increasing the coverage of this data.


Gigawatt hours: abbreviated as GWh, is a unit of energy representing one billion watt hours and is equivalent to one million kilowatt hours.

Data provided by

Ministry of Business, Innovation, and Employment

Dataset name

Energy in New Zealand: Electricity June 2019


How to find the data

At URL provided, click on the hyperlink 'Data tables for electricity'.

Import & extraction details

File as imported: Energy in New Zealand: Electricity June 2019

From the dataset Energy in New Zealand: Electricity June 2019, this data was extracted:

  • Sheet: Table 2
  • Range: B24:AT65
  • Provided: 814 data points

Dataset originally released on:

October 22, 2019

About this dataset

This dataset contains the latest information on electricity generation and demand in New Zealand.