At a glance
A ministerial brief tabled in Queensland budget Estimates on 21 July 2026 shows Sev.en Global Investments offered A$495m for CS Energy’s interest in Callide, conditional on dropping legal claims over incidents since the current government took office.
Sev.en owns 50% of Callide C and in June 2026 filed a A$1bn damages claim against CS Energy in the Federal Court over the plant’s management.
Callide sits on a 1,510MW grid-connected site at Biloela, combining Callide B (700MW) and Callide C (810MW), with transmission access and water from the Awoonga dam.
A ready connection to the electricity grid is the hardest thing to secure for a new AI data centre in Australia, which is changing what old power-station sites are worth.
Queensland has no dedicated data centre plan and was the only state to reject the federal plan requiring large data centres to fund new renewable generation and grid upgrades.
A low price for an asset both sides want
Queensland’s Labor opposition published a leaked ministerial briefing note during budget Estimates on 21 July 2026. The 18 March brief, prepared for Finance Minister Ros Bates, records that Sev.en Global Investments offered to buy CS Energy’s interest in Callide for A$495m, on the condition that it would not pursue legal claims against CS Energy over incidents since the Crisafulli government took office. The LNP-majority committee moved to private deliberation and ruled the document be redacted and not referred to again.
The asset in dispute is Callide C, the 810MW newer half of the station, held in a 50/50 joint venture between CS Energy, owned by the Queensland government, and Sev.en, which took its half out of administration, a form of insolvency, in May 2025. Both sides have tried to take full control: CS Energy has separately sought clearance from the Australian Competition and Consumer Commission to buy out Sev.en’s 50% and own Callide C outright. In June 2026 Sev.en filed a damages claim of about A$1bn against CS Energy in the Federal Court, alleging that poor management caused its losses. The A$495m figure is a low number agreed between two partners who are already suing each other, well below what a site with this much grid connection would fetch if it were sold openly. Under Treasurer Paul Williams declined to say whether an agreement protecting the government from proceedings existed, citing the live court case and commercial sensitivity.
How Callide broke
Callide C has been one of the national electricity market’s most troubled power plants for five years, with three failures spanning two governments.
Date | Unit | What happened |
May 2021 | Callide C4 | Generator explosion, unit destroyed, returned to partial service August 2024 |
October 2022 | Callide C3 | Cooling tower structural collapse |
April 2025 | Callide C3 | Boiler explosion |
The three failures together account for more than 1,700 days of lost generation, and they are the basis of Sev.en’s A$1bn claim against CS Energy.
Energy is the scarce input for AI infrastructure
A firm, grid-connected power asset has become one of the most valuable things to hold in the AI era. Electricity supply, not land or buildings, is the main thing holding up new data centre projects in Australia, as our analysis of the AEMO 5.4GW connection pipeline sets out. Callide is already wired into the grid in central Queensland, with high-voltage lines and a secured water supply, the kind of position that only becomes more valuable as demand for power climbs.
Energy has moved to the centre of how data centre deals are done. New South Wales now asks data centres to help pay for the grid capacity they use, large operators are signing their own power deals such as Google and AirTrunk’s Mulwala solar agreement, and the federal government wants big data centres to pay for new renewable power themselves. Elsewhere, old power sites are being reused for computing, as with Keppel’s 720MW Morwell campus in Victoria’s Latrobe Valley. Demand is not the question: Australia’s specialist AI-cloud operators have committed more than 1,600MW and Anthropic is looking for partners to build the country’s largest data centre. In that market, control of firm, grid-connected power is a commercial advantage.
Sev.en is a sophisticated coal investor, and its moves around Callide read as a play for that value: taking a distressed asset out of insolvency, using the courts as leverage, and offering to buy out the state at a low price. The commercial logic is the same one now shaping where data centres get built, even if Callide itself never hosts a server.
Where Queensland actually sits on energy
Queensland is not yet part of Australia’s active data centre belt, which runs through New South Wales and Victoria, and it is one of the few states without its own data centre plan, chasing investment through general business programs instead, as we set out in our state-by-state review of Australian data centre policy. The industry has started to fill that gap: the Queensland Data Centres Council launched in July 2026 to push the state on the things that decide these projects, namely planning approvals, grid connections and water.
On energy, Queensland has been moving away from what AI data centre builders are looking for. It was the only state to reject the federal plan that would make large data centres pay for new renewable power and grid upgrades, with Treasurer and Energy Minister David Janetzki pointing to cost and reliability. It has also dropped its own legal targets of 70% renewable power by 2032 and 80% by 2035, and backed keeping coal running toward 2049. So a government that wants data centre operators to pay for their own power is, at the same time, thinking about selling a public grid connection those same companies would value highly. South Australia is doing the opposite, as our coverage of its clean-power pitch to win AI data centres shows, using firm, reliable energy to attract investment.
What to watch
Estimates continues on Wednesday with Finance Minister Ros Bates, then Deputy Premier and State Development Minister Jarrod Bleijie, whose portfolios cover the government’s stake in CS Energy. The court case between Sev.en and CS Energy will decide what either side can do next, and settling the A$1bn claim would change what the A$495m offer is worth. The bigger signal is about power: a state that is not yet a data centre destination is deciding whether to let a sophisticated operator take a strategic, grid-connected asset at a low price.