The Energy Savings Scheme Rule (ESS Rule) applies to Accredited Certificate Providers (ACPs) and their energy savings projects. It provides detail about:

  • eligibility requirements
  • calculation methods for determining the number of energy savings certificates (ESCs) that can be created.

ACPs must understand the ESS Rule. For information on your obligations, refer to Obligations of an ACP.

The new ESS Rule was published on 19 December 2023 and applies to all implementations on or after 19 June 2024. 

The ESS Rule that commenced on 14 April 2023 will continue to apply to all implementations before 19 June 2024.

Previous versions of the ESS Rule are provided for reference.

Relevant documentation

Energy Savings Scheme Rule of 2009 – 19 June 2024 (applies to implementations on or after 19 June 2024)
Energy Savings Scheme Rule of 2009 – 14 April 2023 (applies to implementations before 19 June 2024)

The Department of Climate Change, Energy, the Environment and Water is is responsible for developing the policy behind the ESS and updating the ESS Rule annually or at other times as required. To find out more about how the ESS Rule is updated and how to get involved, please visit the Energy NSW website.

June 2024 ESS Rule change

Changes to the ESS Rule that apply to implementations on or after 19 June 2024 include:

  • increased co-payments for HEER water heater and air conditioner activities from $30 to $200 (excluding GST) (Activity Definitions: D16–D21)
  • new co-payments of $200 (excluding GST) for IHEAB heat pump water heater activities (F16–F17)
  • changes to baseline energy savings and adjustment coefficients for calculating energy savings for HEER water heater activities (D17–D21)
  • the use of climate zone as well as system size to determine factors for calculating energy savings for heat pump water heater activities (D17, D19).

Our Quick Reference Guide will help you understand and prepare for the changes.

April 2023 ESS Rule change

The previous ESS Rule change commenced on 14 April 2023. It added new eligible fuels and made other changes to simplify and clarify the Rule. We published a Quick Reference Guide to provide information on these changes.

Please refer to the guides below for more information on how changes to the ESS Rule impact you.

Information guides

Quick Reference Guide - June 2024 ESS Rule Change - March 2024

Quick Reference Guide - April 2023 ESS Rule Change - February 2023

Fact Sheet - ESS Rule Amendments - August 2022

Fact Sheet - Air Conditioners and Refrigerated Cabinets - February 2022

Fact Sheet – ESS Rule Amendments – January 2022

Fact Sheet - Water Heaters - January 2022