What is IREN building in South Australia?

IREN is planning an 800MW AI data centre campus at Bundey, a locality in the Mid North of South Australia about 125km northeast of Adelaide. On 3 June 2026 the company signed a transmission connection agreement securing four 330kV feeder exits at the local substation, sized to carry up to 800MW without network upgrades. It is IREN’s first announced Australian project, with energization targeted from 2028. IREN expects the campus to create more than 200 ongoing skilled jobs and over 500 roles during construction.

Who is IREN and is it an Australian company?

IREN Limited (NASDAQ: IREN) was founded in Sydney in 2018 as Iris Energy and retains its Sydney headquarters, though it lists on the Nasdaq in the United States. It began as a Bitcoin miner and has pivoted to become a vertically integrated AI cloud provider, running data centre campuses across Texas, Oklahoma, British Columbia and Spain. The Bundey campus is the first time the Australian-founded company has committed large-scale capacity in its home market.

Why did IREN choose Bundey in South Australia?

IREN cited three reasons: South Australia’s target of 100% net renewable electricity by 2027, submarine fibre connectivity into APAC demand centres including Singapore, Indonesia, South Korea and Japan, and a supportive state government. Bundey also sits at the centre of ElectraNet’s proposed Northern Transmission Project, which connects the state’s renewable energy zones to new industrial load and gives the campus headroom for clean power.

When will the IREN Bundey campus be operational?

IREN is targeting energization from 2028. The transmission connection agreement is signed, but construction has not started. The company expects to begin early works and procurement in parallel with satisfying regulatory approvals and the conditions attached to the agreement, so the 2028 timeline depends on planning, environmental and grid approvals progressing as planned.

South Australia lands its largest AI campus as IREN builds at home, 800MW at Bundey

At a glance

IREN has signed a transmission connection agreement to support a planned 800MW data centre campus at Bundey in regional South Australia, its first announced Australian project.
The agreement secures four 330kV feeder exits at the local substation, expected to carry up to 800MW without requiring network upgrades, with energization targeted from 2028.
Bundey sits at the centre of ElectraNet’s proposed Northern Transmission Project, the high-voltage expansion designed to connect South Australia’s renewable energy zones to new industrial load.
The site draws on South Australia’s target of 100% net renewable electricity by 2027 and submarine fibre routes into Singapore, Indonesia, South Korea and Japan.
IREN expects the campus to create more than 200 ongoing skilled roles and over 500 jobs during construction.
South Australian Premier Peter Malinauskas backed the project publicly, framing it as evidence of the state’s renewable-energy and pro-investment positioning.

What IREN announced

On 3 June 2026, IREN Limited (NASDAQ: IREN) confirmed it had signed a transmission connection agreement to support a planned 800MW data centre campus at Bundey, a locality in the Mid North of South Australia roughly 125km northeast of Adelaide. It is the first Australian project the company has announced, and IREN describes it as one of the largest single-site campuses disclosed in the Asia-Pacific region to date.

IREN began life in Sydney in 2018 as Iris Energy, retains its Sydney headquarters, and lists on the Nasdaq. Until this announcement, every megawatt the company had energized or contracted sat in North America or, more recently, Spain. Bundey is the first time the operator has put committed capacity on Australian soil, and at 800MW it has done so at scale.

The deal is a grid-connection milestone rather than a construction start. IREN expects to begin early works and procurement in parallel with satisfying the regulatory approvals and conditions attached to the transmission agreement. Energization is targeted from 2028, which places first power broadly in line with the delivery windows operators such as NEXTDC and Firmus are working toward for their own sovereign-AI capacity.

Why South Australia, and why now

IREN’s stated logic rests on three site attributes: clean power, regional connectivity, and a state government moving on AI. South Australia is targeting net 100% renewable electricity by 2027, a grid that already runs at roughly a 75% wind and solar share over a rolling twelve months and is positioned to become the first gigawatt-scale system in the world to reach the net-100% mark. For a load as power-hungry as an 800MW AI campus, abundant renewable generation is the gating input, and South Australia carries the highest wind and solar penetration of any mainland grid.

Connectivity is the second draw. Bundey benefits from submarine fibre routes into the major APAC demand centres of Singapore, Indonesia, South Korea and Japan. That matters because the campus is pitched at regional and global AI workloads, not only domestic ones. Co-founder and Co-CEO Daniel Roberts said South Australia offers “abundant clean energy, the connectivity to serve the APAC region, and a State Government that understands the opportunity and is acting on it.”

The third factor is policy posture. South Australia was the first state to create a dedicated assistant ministry for artificial intelligence, a role held by Michael Brown, and has since stood up an Office for Artificial Intelligence. Premier Peter Malinauskas tied the IREN project directly to that agenda, calling the Bundey campus “a significant investment in our state” with the potential to create hundreds of construction jobs and strengthen the state’s position as a technology hub for the Asia-Pacific region. State backing of this kind shortens the path from announcement to energization, and it is the kind of alignment we flagged as decisive in our analysis of Australia’s narrowing window to capture its share of the AI infrastructure boom.

What the grid agreement actually secures

The substantive content of the announcement is the transmission connection itself. IREN has secured four 330kV feeder exits at the utility’s substation, a configuration expected to support up to 800MW without triggering network upgrades. Across the Australian market, the binding constraint on large AI campuses is rarely land or capital; it is firm, timely grid connection. A connection sized for the full 800MW load at signing, rather than staged behind future augmentation works, removes the grid-connection delay that stalls many comparable projects.

The site sits at the centre of ElectraNet’s proposed Northern Transmission Project, the high-voltage build-out intended to link South Australia’s northern renewable energy zones to growing demand and new industrial load. Anchoring a hyperscale campus to that corridor gives IREN headroom for renewable supply and gives the transmission project a foundation customer. It is the same co-location logic that underpins the strongest projects in our neocloud market report: own or secure the power and the land, then layer the compute on top.

How Bundey compares to Australia’s largest campuses

At 800MW on a single site, Bundey enters the upper tier of Australian data centre developments. The table below sets it against the other large-scale campuses and programs disclosed across the market.

Project	Operator	Scale	Location	Status
Kemps Creek	AirTrunk	1.2GW	Western Sydney, NSW	Proposed, planning stage
Project Southgate	Firmus	1.6GW (across five sites)	TAS, VIC, ACT, NSW, WA	In development, staged
S7 Eastern Creek	NEXTDC	~550MW, A$7bn (OpenAI anchor)	Western Sydney, NSW	Phase 1 targeted H2 2027
Bundey	IREN	800MW	Mid North, SA	Grid connection signed, energizing from 2028
CDC AI campus	CDC Data Centres	555MW (single contract)	Multiple	Contracted

Source: Certified Strategic Editorial, primary company disclosures, June 2026. Figures reflect announced or proposed capacity and are subject to staged delivery.

Two points stand out from the comparison. First, the largest Australian projects remain clustered in New South Wales and the eastern seaboard, which makes Bundey a genuine geographic broadening of the national pipeline rather than another Sydney-basin entry. Second, Bundey is a single-site 800MW campus, where programs such as Project Southgate distribute their gigawatts across multiple cities. On a per-site basis, that puts Bundey among the largest single loads announced in the country, and it is the reason the grid configuration matters so much.

The company building at home

IREN arrives in Australia with a substantial offshore footprint already operating. The company runs campuses live and in development at Childress and Sweetwater in Texas, Kiowa in Oklahoma, and several sites in British Columbia, alongside roughly 490MW of grid-connected power in Spain acquired through its purchase of developer Nostrum. IREN puts its total development pipeline at around 5GW. The Australian project adds 800MW to that figure and, for the first time, anchors part of it in the company’s home market.

The customer and capital backdrop is what makes the expansion credible. IREN holds a multi-billion-dollar AI cloud contract with Microsoft, and NVIDIA is set to invest in the company to support deployment of up to 5GW of NVIDIA-aligned compute. On 1 June 2026, IREN closed a US$3.65 billion investment-grade GPU financing facility, rated A and A(low) by Fitch and DBRS, to fund that Microsoft contract. A company financing GPUs at investment grade, and pivoting from its Bitcoin-mining origins toward AI cloud, has both the balance sheet and the demand cover to underwrite an 800MW domestic build.

IREN also arrives into a domestic capital surge already under way. In February 2026, Firmus secured a US$10 billion debt facility led by Blackstone and Coatue, and Sharon AI listed on the Nasdaq, two events we examined in Sharon AI’s Nasdaq debut and the Firmus US$10B question. The same hyperscaler and chip-maker pull driving IREN’s offshore growth, and the sovereign-AI demand we covered in the Anthropic Australia data centre MOU, is now drawing capital onshore at scale.

What this means and what to watch

Bundey gives Australia an 800MW AI campus from a homegrown operator, located outside the crowded eastern-seaboard grid and tied to the grid with the highest renewable share in the country. For the domestic market, the project widens the geographic spread of the pipeline, brings a Nasdaq-listed Australian-founded company’s capital back onshore, and gives South Australia a flagship to match the AI ambitions it has signalled at the policy level. The 200-plus ongoing roles and 500-plus construction jobs add to demand in a sector already short of skilled workers, a gap we track in our 2026 hiring landscape for AI infrastructure and on the Certified Strategic jobs board.

Three things are worth tracking from here. The first is regulatory: the transmission agreement is conditional, and the early-works timeline depends on planning, environmental and grid approvals progressing in parallel. The second is the Northern Transmission Project itself, since Bundey’s renewable headroom is tied to that corridor being built out on schedule. The third is the customer question. IREN has not yet named the workloads that will fill the campus, and whether Bundey serves domestic sovereign-AI demand, regional APAC inference, or IREN’s own cloud customers will shape how much of its value accrues to Australia. We will track each of these as the project moves from grid connection toward first power.