AI Boom Demands 1.2GW: Inside AirTrunk's $9B Sydney Data Centre

As frontier AI models balloon in parameter counts, the infrastructure to support them must follow suit. The proposed 1.2GW AirTrunk facility is a concrete answer to AI’s insatiable hunger for compute, but it also raises uncomfortable questions about whether such energy intensity can be reconciled with sustainability goals.

AirTrunk’s proposed $9 billion Kemps Creek data centre campus marks a pivotal moment for Australia’s digital infrastructure, thrusting the nation into the league of global hyperscale deployments. The facility, if approved by NSW authorities, would become the first Australian data centre to exceed a power capacity of one gigawatt, reaching 1.2 GW – equivalent to the annual electricity consumption of roughly one million homes. The project sprawls across 52 hectares of vacant land in western Sydney, an area already densely packed with major data centre developments, earning the nickname ‘data centre alley’. AirTrunk, a US-based operator, plans to build six four-storey data halls over a decade, operating 24/7, supported by an immense backup infrastructure including 852 diesel generators, 936 cooling units, 14.4 million litres of diesel storage and 2.65 million kilograms of lithium-ion batteries. Such staggering scale underscores the relentless demand driven by artificial intelligence, cloud computing and data storage, which planning documents frame as essential for Australia’s digital sovereignty.

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AirTrunk’s proposed $9 billion Kemps Creek data centre campus marks a pivotal moment for Australia’s digital infrastructure, thrusting the nation into the league of global hyperscale deployments.

The Kemps Creek proposal does not exist in isolation. It joins a cluster of recently proposed or approved mega-facilities: Stack Infrastructure’s 450 MW campus at Erskine Park, NEXTDC’s 250 MW facility at Horsley Park, Microsoft’s 190 MW development also at Kemps Creek, and the Echidna data centre at Eastern Creek. Collectively, these projects are transforming the semi-rural fringe of Sydney into a critical node for the Asia-Pacific digital economy. The concentration, however, is fuelling a backlash from schools, residents and freight operators. Two nearby schools educating over 1500 students are directly affected, raising fears about diesel particulate matter, noise, light spill and traffic congestion during the decade-long construction phase and beyond. Residents express concern over the cumulative impact of multiple data centres on air quality and the local road network.

From an industry perspective, the facility is a necessary response to the explosive growth of AI workloads and enterprise cloud migration. Hyperscale cloud providers and SaaS companies are voracious consumers of compute, and Australia has historically suffered from latency and data sovereignty constraints that push critical infrastructure onshore. A 1.2 GW campus could host tens of thousands of servers, providing the backbone for everything from AI model training to real-time analytics. For the SaaS sector, it means lower latency, improved reliability and the ability to meet data residency requirements, potentially accelerating domestic innovation and attracting global players to establish Australian points of presence.