|Region||Year ended||Average consumption (kWh)||Average consumption previous year (kWh)||Average consumption change (kWh)||Average consumption percentage change (%)||Region rank||Region rank previous year||Region rank change|
|Bay of Plenty||31/12/2016||6,720.03||6,640.98||79.05||1.19||11||11||0|
|Area Outside Region||31/12/2016||17||17||0|
This report shows the average and total residential electricity consumption by region and year. The report ranks regions and highlights changes in annual measures.
Consumption data is received annually from retailers in the form of monthly EIEP1 files (transferred from retailers to most distributors). These values have not been loss adjusted back to the grid point of connection where energy is reconciled.
Residential connections are defined consistently with other reports on EMI - they have no ANZSIC code in the registry. To be clear, this definition means they will include connections that may not be to primary residences, for example holiday homes.
Consumption information is cleaned where outliers or data that may not reflect residential use is removed. This involves filtering out ICPs that appear not to be residential given their property name or that have a meter category other than category 1. We exclude any ICPs that use less than 1000kWh or more than 30,000kWh annually. In addition we exclude any ICP using more than 5000kWh in a single month and apply some smoothing. This allows us to calculate an average monthly consumption for various regions. These averages are then scaled by the full number of residential connections to provide estimated totals for the residential market segment. We include a quality attribute (coverage) in the data report that details the percentage of residential ICPs these consumption statistics are derived from.
Region types are either network based or derived from standard statistical boundaries. Network based regions are network supply points (NSP), network reporting regions and zones, mappings are available in the NSP table which is available as a wholesale report. Other regions are derived from ICP location data and statistical boundaries (2013 census). ICPs without location data default to the location of their NSP. Main centres use Territorial Authority boundaries (city councils) where Wellington includes Porirua City, Upper Hutt City, Lower Hutt City, and Wellington City. The data report lets users select 'All regions' (where the regions are not the data series) to get data for all regions in a single file. Regions are listed North to South except for NSPs
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