2021 Residential Energy Baseline Study: Australia and New Zealand

The then Department of Industry, Science, Energy and Resources (the Department), on behalf of the trans-Tasman Equipment Energy Efficiency (E3) programme, engaged EnergyConsult to undertake an update of the Residential Baseline Study (RBS), an appliances and equipment energy use modelling tool of the Australian and New Zealand residential sector which was previously undertaken in 2015.

2021 RBS data tables are freely available for users to take advantage of this valuable data, see downloads. The 2021 RBS models total energy use and demand by end-use (appliance type) and fuel using thousands of pieces of data, applying a bottom-up end-use energy model of the residential sector. This helps to examine and understand the contribution of end-uses, product groups and products over the period from 2000 to 2040. 

The publicly released RBS data tables contains a range of model outputs to provide governments, businesses and individuals with household appliance, building and energy data to support policy development and business planning.

Key enhancements in this update include:

  • Power Demand by Time of Use Data (a simplified version released publicly, see downloads);
  • Weather data linkages;
  • Policy scenario tool; and
  • Increased data categories and outputs.

Examples of the findings of the RBS relevant to 2019 include:

  • Electricity accounted for more than 53% of the energy used in Australian households and created around 84% of residential greenhouse gas emissions.
  • Natural gas accounts for more than 38% of the energy used in Australian households and created around 15% of residential greenhouse gas emissions
  • Space conditioning and water heating are the major sources of household energy use in Australia, 40% of the energy used in an average Australian home is used in space conditioning and 23% is used to heat water. Estimated at the afternoon peak demand of 6pm, across all weekdays of the full year, space conditioning accounted for 20% of energy demand at this time.
  • Estimated peak solar generation at midday (local standard time) in Summer was over 4,400MW. This is double the same measure at 2015 of 2,200MW.

See the 2021 RBS Methodology Report for further information.