Integrating Energy Storage Systems project
AEMO has established the Integrating Energy Storage Systems (IESS) project under the NEM Reform Program to carry out the procedure and system changes arising from the IESS rule and to support industry readiness for the IESS changes.
Forming a part of the Energy Security Board’s (ESB) National Electricity Market (NEM) 2025 reform portfolio, the IESS rule seeks to better integrate storage and hybrid systems into the NEM.
Fri 31 Mar 2023
SGAs providing FCAS
Small Generation Aggregators (SGAs) can elect to register to provide ancillary services.
Wed 09 Aug 2023
Aggregated dispatch conformance
Aggregate Systems can choose to register for aggregated dispatch conformance (ADC).
Sun 02 Jun 2024
Settlement and non-energy cost recovery (NECR) changes
Fundamental change - move from current category-based approach to a directional approach:
Non-energy cost recovery will change to recovery from cost recovery market participants (CRMPs) based on their proportion of sent-out or consumed energy. CRMPs are: Market generators, Integrated Resource providers, Market customers.
New/updated National Meter Identifier (NMI) Classification Codes
Via the Retail Procedures, 3 new codes and amendments to 2 further codes will be implemented under IESS for:
Sun 02 Jun 2024 (SGAs)
On and from Mon 03 Jun 2024 (other)
Introduction of new, near universal participant type – Integrated Resource Provider (IRP)
New category will help simplify registration, particularly for battery participants who currently need to register as both a customer and a generator.
An Integrated Resource Provider will be able to classify a wide range of units.
Optional transition for Semi-scheduled generator with non-scheduled battery
Mon 03 Jun 2024
Facilitating bi-directional units (BDU)
A new unit type for plant (such as a battery) that can act as a generator and a consumer of electricity.
IESS Participant toolbox
The IESS Participant Toolbox is a central location for useful resources to help participants understand and prepare for the changes associated with the IESS rule’s implementation.
This initiative forms part of NEM Reform Program and market participants can get involved by visiting:
The IESS Working Group (IESS-WG) has closed, and its work transitioned into the Program Forums and Working Groups. The project thanks stakeholders who contributed to the IESS WG. Meeting contents and outcomes remain available on the IESS working group landing page.
Many of AEMO’s procedures, guidelines and other documents need to be changed to implement the Integrating Energy Storage Systems (IESS) Rule.
For more information, please contact IESS@aemo.com.au.