AEMO Publishes Final Go-Live Plan for EnergyConnect Interconnector
The August 7 document sequences commercial energisation of the 900km SA-NSW link and exposes AU$964 million in claimed consumer benefits to their first market test.
AEMO published the final version of its go-live plan for Project EnergyConnect on 7 August 2026 (2026-08-07). The document sets the commercial energisation sequence for what Transgrid describes as Australia's largest transmission project — a 900km interconnector connecting South Australia and New South Wales — and gives NEM spot participants the first binding timetable for when expanded transfer capacity will be available to the market.4
The interconnector runs in three stages. Its first stage covers 160km from South Australia, with subsequent sections extending into New South Wales. Transgrid confirmed in June 2026 (2026-06-11) that the NSW section was fully energised following construction completion. Physical energisation is not the same as commercial market entry, and AEMO's go-live plan governs the latter — its publication ends a period of uncertainty about when the line actually affects dispatch.2
The civil scope gives a sense of what is now live. The NSW section alone required more than 10 million worker hours, 1,508 towers and monopoles, 46,068 tonnes of steel, and 10,385km of conductor cabling, according to Transgrid. Transgrid puts the project's gross market benefits at AU$4.2 billion over the project's life, with net benefits to energy consumers of AU$964 million. Those figures rest on modelled renewable uptake and dispatch assumptions that operational market data will now start testing.2
One of the interconnector's explicit purposes is integrating new renewable generation from the Riverina and South West NSW into the NEM — territory that overlaps directly with the NSW South-West renewable energy zone. Projects queued in that zone, including developments by RWE, have economics contingent on when they gain dispatch access. The go-live plan's sequencing determines that timeline.2
AEMO's ability to execute without slippage is less certain than the published schedule implies. The operator disclosed in June 2026 (2026-06-02) that its workload had become a constraint, triggering a staged rethink of the implementation timeline for the Integrated Project Rule Review, a parallel market reform programme. That disclosure came weeks before the EnergyConnect go-live plan entered its final form. A regulator managing overlapping major programmes carries real execution risk.1
Demand-side assumptions carry their own uncertainty. A review of the Australian electricity and gas sector covering July and early August 2026 (2026-08-18) found that data centres were facing significant scrutiny, with large rollouts representing a load profile not embedded in the demand scenarios behind EnergyConnect's benefit projections. Concentrated, continuous data centre consumption could alter dispatch outcomes in ways the original modelling did not capture.3
Wallumbilla gas traded at A$11.05/GJ as of 24 August 2026 (2026-08-24). Newcastle thermal coal held at $124.50 per tonne as of 25 August 2026 (2026-08-25). Both reflect a dispatch stack that has not yet been reshaped by an interconnector that is physically complete but commercially inactive.
The first concrete test of the 7 August (2026-08-07) plan will be whether AEMO holds to its staged commissioning milestones, particularly the access sequencing for South West NSW renewable generators. Any schedule slippage pushes realisation of the AU$964 million net benefit figure further out and extends the period of dispatch uncertainty for generators waiting in that corridor.