Proposed changes at a glance

The Australian Energy Market Operator (AEMO) has commenced a consultation on proposed changes to its Guide to Registration Exemptions and Production Unit Classifications (the Guide), which governs registration exemptions for generating systems and integrated resource systems in the National Electricity Market.

The reforms are intended to simplify the exemption framework, better reflect the evolving energy technology and energy market landscape, and reduce administrative requirements that AEMO considers disproportionate to the risks involved.

Key proposed changes include:

• a new self-declared exemption pathway for eligible systems less than 30 MW, replacing the current application-based exemption process for systems less than 30 MW;
• an increased bidirectional unit threshold, allowing batteries and similar technologies with an aggregate nameplate rating of less than 15 MW (up from 5 MW) to qualify for exemption;
• a broader and more transparent pathway for AEMO-assessed exemptions for larger systems (30 MW or above), including removing the existing requirement that new systems must connect solely to provide unscheduled reserve;
• clearer guidance on the regulatory treatment of back-up generation and uninterruptible power supplies at data centres and other large load facilities; and
• reformed pre-commissioning exemptions, including removal of the 90-day time limit and a new self-declared option for lower-risk testing.

How the proposed changes could affect you

Self-declared exemption pathway: Proponents of eligible generating systems and integrated resource systems with an aggregate nameplate rating of less than 30 MW, whether or not comprising a bidirectional unit(s) of less than 15 MW, may be able to self-declare an exemption, but will remain responsible for complying with the eligibility criteria and exemption conditions.

Battery and hybrid projects: AEMO proposes to increase the bidirectional unit exemption threshold from 5 MW to 15 MW across both the self-declared and AEMO-assessed pathways, recognising that bidirectional units such as batteries may present a lower risk profile than conventional generators where export capability or behaviour is constrained. Proponents of projects incorporating bidirectional units between 5 MW and 15 MW should revisit their registration strategy, as projects currently ineligible for an exemption may become eligible under the new framework.

Engage your NSP early: A key gateway eligibility requirement is that the relevant Network Service Provider (NSP) must provide written confirmation, dated within the previous 12 months, that the exemption will not adversely affect its ability to meet applicable power system performance and quality of supply standards under the NER or any applicable agreed technical performance standard for the production facility, and that sufficient SCADA visibility is available where required. Obtaining this confirmation is likely to become a critical path item for proponents, making early engagement with the connecting NSP on performance standards and SCADA requirements advisable.

Data centres and large loads: For the first time, the Guide would address how the exemption and registration framework applies to uninterruptible power supply (UPS) arrangements and back-up generation at load facilities, including data centres. Data centre and large load developers should assess their proposed UPS and back-up generation configuration early in the design process, particularly switching arrangements and any period of parallel operation with the grid.

Pre-commissioning testing: Proponents with straightforward, single-unit testing programs should consider whether they qualify for the proposed new self-declared pathway, while those running larger or multi-unit commissioning programs should factor AEMO's assessment timeframe into project delivery and commissioning plans.

Embedded network developers: For production facilities connected to an embedded network, the 20 GWh limit applies to the aggregate energy exported from all systems connected to the embedded network at the parent connection point. Developers of embedded network projects, particularly multi-tenant and precinct-style developments with shared connection infrastructure, should assess their position under the proposed aggregation rules.

Key dates and next steps

Stakeholders can participate the consultation by lodging a written submission or engaging directly with AEMO during the consultation period. The key dates for the consultation are as follows: