Synergy opened expressions of interest on 24 August 2026 for organisations seeking to become members of the Aggregator Panel under Western Australia's Third Party Aggregation Framework. The round runs for four weeks, which places the close on or about 21 September 2026.
This is the first application round since the framework took effect. Synergy published the TPA Framework, the TPA Model Contract and the TPA Handbook to take effect by 1 July 2026, and undertook to commence the initial Aggregator Panel application process within two months of that date. The round opened inside that commitment.
Panel membership is the gate, not the contract
The framework governs how a third party aggregator may build a service on distributed energy resources that belong to Synergy's non-contestable customers. Aggregator Panel membership is the eligibility condition for providing market services to the Australian Energy Market Operator or to Western Power using those assets. An organisation applies by completing the application process and entering into the TPA Model Contract with Synergy.
Synergy states the position plainly in its notice: membership does not guarantee a services contract with AEMO or Western Power. It establishes the foundation for participating in future service opportunities, and a panel member must still bid into those opportunities and be selected. The panel is a prequalification step, and treating it as a commercial award would misread it.
Queries on the framework, the model contract and the application process are directed to Synergy at tpa@synergy.net.au, and the application material sits on Synergy's procurement opportunities page.
The customer definition is what makes this consequential
The framework applies to the distributed energy resources of non-contestable customers. In the South West Interconnected System, a non-contestable customer is one consuming 50 MWh a year or less. That threshold covers effectively every household and most small businesses on the network, and those customers cannot buy electricity from any retailer other than Synergy.
That is the structural reason the framework exists. In the eastern states an aggregator can contract directly with a household and its retailer of choice. In the SWIS the retail relationship for a residential customer sits with Synergy and cannot be moved, so a third party wanting to orchestrate that household's battery has to reach it through Synergy rather than around it. Synergy holds the Parent Aggregator role and is required to develop, publish and maintain the framework that makes such an arrangement possible.
The practical effect is that the rooftop solar and battery fleet installed across Perth and the wider SWIS now has a defined pathway into market services, and the terms of that pathway are set by a published framework and a model contract rather than negotiated case by case.
An installed system today is untouched by this
Nothing in this round alters the operation of an existing residential or small business system, changes an export arrangement, or creates an obligation for any owner of a battery. The Distributed Energy Buyback Scheme is unaffected by it, and no customer is enrolled in anything by virtue of a panel being formed.
The change is upstream of the customer. It establishes which organisations may later approach the market with an orchestration proposition, and on what contractual footing. Any offer that eventually reaches a household would arrive through a party that has been admitted to the panel, has executed the model contract and has won a service opportunity, which is three steps beyond where the market stands in August 2026.
For an owner weighing a battery purchase now, the sequence matters more than the announcement. A system installed today is not disadvantaged by a panel formed in September, and a claim that a particular product is required in order to participate in a future virtual power plant has no support in anything Synergy has published to date.
