Integrating Energy Storage Systems project


The Australian Energy Market Operator (AEMO) has established the Integrating Energy Storage Systems (IESS) project to carry out the procedure and system changes arising from the IESS rule.  

Forming part of the Energy Security Board’s (ESB) National Electricity Market (NEM) 2025 reform portfolio, the Integrating Energy Storage Systems rule seeks to better integrate storage and hybrid systems into the NEM.  

The IESS rule has two key implementation dates: 

  • 31 March 2023: the ‘interim’ release which will enable: 
    • Aggregators of small generating and storage units to provide ancillary services 
    • Hybrid systems to use aggregated dispatch conformance  
  • 3 June 2024: The ‘final’ release enabling full implementation of the IESS rule. 

This web page provides participants and the broader industry with a one stop shop for information regarding the IESS implementation project.  

AEMO’s IESS project and industry engagement 

AEMO’s IESS project has established an IESS Working Group (IESS-WG) for affected participants and other related bodies to support the IESS rule implementation. Meeting contents and outcomes are made available on the Working Group landing page

For more information, please contact

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