Australia’s Data Centre Boom Meets the Grid: AEMO Forecasts 34 TWh Demand by 2035–36
The Electricity Forecast Keeps Getting Steeper
Australia’s energy market operator is not in the business of hyperbole, but its data centre demand projections have undergone a series of upward revisions that tell their own story. AEMO’s 2026 Electricity Statement of Opportunities (ESOO) forecasts data centre consumption in the National Electricity Market (NEM) rising from approximately 5 TWh in 2025–26 to 34 TWh by 2035–36, lifting data centres’ share of grid supply from around 3% to 13%. That is nearly a sevenfold increase in a decade—a trajectory that places data centres among the fastest-growing sources of electricity demand in the country.
Connection Queues Are Stretching, but Delivery Is Uncertain
The pipeline of proposed data centre capacity seeking grid access is even more striking than the demand forecast. At the end of Q2 2026, AEMO was tracking 9.0 GW of maximum data centre connection capacity in the formal transmission connection process, with 52% in New South Wales and 31% in Victoria. Western Sydney is already feeling the pinch: Transgrid has reported more than 20 GW of data centre connection enquiries, with about 1.5 GW covered by signed agreements, leaving limited headroom for additional large connections without network augmentation.
Yet connection applications are not commitments. CBA economists note that more than one-third of connection requests made over the previous year were withdrawn, and the high degree of duplication in AEMO’s queue data means that even meaningful progress through the connection process does not guarantee delivery. The gap between proposed load and energised load is where the real infrastructure challenge lies.
The Renewable Energy Question—and the Firming Rule Change
The Australian government has made clear that new data centre load should be matched by additional renewable generation. In July 2026, Prime Minister Anthony Albanese proposed that large data centres be required to pair with equivalent-scale new green energy supply, and National Cabinet subsequently agreed to a framework under which data centres should be powered by renewables backed by storage and firming. A proposed rule change by Climate Change and Energy Minister Chris Bowen would, if approved, grant the Australian Energy Regulator the power to “turn down” data centres that hold insufficient firming capacity or contracts during periods of tight supply.
For energy companies, this is both an opportunity and a test. The opportunity lies in the enormous demand pull for new solar, wind, storage, and firming capacity. The test lies in timing: a data centre can be built and energised in two to three years, while new transmission typically takes five to ten years or more. The Smart Energy Council has warned that if 5 GW of additional data centre load connects before matched new supply is built, wholesale electricity costs in the eastern states could rise by up to A$40 billion over six years, with households bearing A$9.2 billion of that burden.
Location Is Becoming an Energy Decision
The energy constraint is redrawing the data centre map. CBRE observes that electricity availability is broadening location consideration beyond Sydney and Melbourne, with significant expansion planned in Perth, Brisbane, and Darwin, and emerging regional interest in the Latrobe Valley and Hunter Valley where scalable power can be secured, sometimes with behind-the-meter generation. For infrastructure and energy players, the message is clear: the data centre boom is no longer just a real estate story. It is an energy system integration challenge, and the winners will be those who can deliver firm, clean, and timely power to the campus gate.
