Delays at Kidston: What Australia’s Pumped Hydro Problems Mean for Investors
For years, pumped hydro has been treated as one of the great pillars of Australia’s energy transition. Politicians like it because it sounds dependable. Energy planners like it because it can store large amounts of electricity for extended periods. Investors have liked the theory because renewable energy ultimately needs firming capacity if coal generation is to disappear from the grid.
The problem is that Australia has become remarkably poor at actually delivering it.
The latest delays at the Kidston Pumped Hydro project in Queensland are another reminder that the transition to net zero is not simply about ambition. It is about execution. And increasingly, execution appears to be where Australia struggles most.
The 250 megawatt Kidston Pumped Hydro project, located at a former gold mine roughly 270 kilometres north west of Townsville, has again been delayed. Commercial operations are now expected in July 2027 after another six month push back. Originally, the project was expected to be operational by 2024. (1)
That is not a minor delay. That is effectively a three year slippage on a project that has long been promoted as a showcase for Australia’s clean energy future.
The project is being developed by Genex Power, which was taken private in 2024 following its acquisition by Japanese owned J-Power in a deal valuing the business at around $1 billion. Since becoming private, detailed updates have become less visible, with much of the market, as reported in the AFR, relying on updates from the Australian Energy Market Operator rather than the company itself.
Why Is Australia So Bad at Pumped Hydro?
Genex argues the delays are not due to technical failures, but rather the sheer complexity of building a pumped hydro project in Australia for the first time in four decades. Chief executive Craig Francis noted that Queensland’s last pumped hydro commissioning was Wivenhoe in 1984 and that much of the expertise from that era has effectively disappeared.
That comment might sound amusing on the surface. The people who built the last projects are now retired and enjoying life. But underneath it sits a much larger structural problem.
Australia stopped building this infrastructure.
When industries stop building things for decades, skills disappear, supply chains weaken, expertise leaves and costs inevitably rise when activity restarts.
Kidston is hardly the only example. The other major pumped hydro project under construction in Australia is Snowy 2.0, which has become synonymous with delays, cost blowouts and political headaches. Together, the two projects paint a difficult picture for a technology that governments continue to rely on heavily in long term energy planning.
The irony is that Australia should theoretically be very good at this type of infrastructure. We are a mining nation. We build tunnels, dams and large scale engineering projects constantly. Yet when it comes to energy transition infrastructure, projects repeatedly become tangled in politics, approvals, labour shortages and changing government priorities.
That is not simply an environmental problem. It is increasingly a national productivity problem.
Pressure Building on Queensland’s Energy Plans
Queensland’s current energy road map assumes at least 1.4 gigawatts of medium duration storage will be operational from 2034 to support reliability as coal generation declines. That storage is expected to come from a mix of eight hour batteries and smaller pumped hydro projects.
But the state government is already walking a tightrope.
As reported in the Financial Review, the massive Pioneer-Burdekin pumped hydro proposal near Mackay has effectively been abandoned following concerns around cost and environmental impacts. It also notes the proposed Borumba project south of Gympie is reportedly being downsized as authorities attempt to manage rising costs.
Meanwhile, Queensland Investment Corporation has been reviewing the commercial viability of several other proposed projects, with uncertainty around timelines already beginning to concern investors.
This is important because pumped hydro is not just another renewable energy project. These developments are enormous pieces of infrastructure. They require billions in upfront capital, years of planning, extensive transmission connections, geological certainty and stable policy settings. When any of those elements weaken, investor confidence weakens alongside them.
Australia’s energy future is increasingly dependent on private capital. Governments simply do not have the balance sheets to fund every single renewable energy project themselves. If institutional investors begin to view large scale storage as politically unstable, commercially uncertain or operationally difficult, capital will inevitably start looking elsewhere.
Batteries Are Changing the Equation
There is another issue emerging as well.
Battery technology has improved far faster than many expected.
When projects like Kidston were first proposed, pumped hydro was viewed as one of the only realistic options for long duration storage. Today, utility scale batteries are being deployed at extraordinary speed, construction times are far shorter and technological improvements continue reducing costs.
As reported in the Australian Financial Review, even Genex’s own chief executive suggested most of Queensland’s future storage targets would probably be met by batteries rather than pumped hydro.
That is a remarkable admission from the developer of one of the country’s flagship pumped hydro projects.
The economics are changing in real time.
The Renew Economy reporting on this delay also highlighted that Genex is reconsidering its associated Kidston wind project due to rising construction costs and project complexity. At the same time, the company has shifted attention toward battery infrastructure at the site. (2)
In many ways, that may tell investors where the market increasingly believes the future lies.
None of this means pumped hydro disappears entirely. It still offers advantages. It can provide very long duration storage and potentially operate for decades. But Australia’s inability to build these projects efficiently is becoming difficult to ignore.
Lessons for Investors
The energy transition remains very real. Demand for storage, transmission and renewable infrastructure is not disappearing. If anything, it is accelerating. But investors need to separate technologies that sound attractive in theory from projects that can actually be delivered on time and on budget.
That means paying closer attention to delivery capability, balance sheet strength, approvals pathways and political consistency.
It also means recognising that the market increasingly rewards technologies that are quicker to deploy, easier to scale and capable of producing returns within realistic timeframes.
This is one reason batteries continue attracting enormous capital flows despite ongoing enthusiasm around pumped hydro. They are faster to build, require less complex civil engineering and carry fewer development unknowns.
The delays at Kidston are disappointing. But they are also revealing. They highlight both the opportunities and the growing pains inside Australia’s energy transition.
Because while the country remains rich in renewable resources, turning those resources into functioning infrastructure is proving far harder than many expected.
The Bottom Line
Kidston’s latest delay is more than a project specific setback. It is another warning sign that Australia’s energy transition is facing a delivery problem, not an ambition problem. Pumped hydro still has a role to play, but repeated delays and rising costs are beginning to shift investor attention toward technologies that are faster and easier to deploy. For investors, the opportunity in the transition remains enormous. But increasingly, the winners may be the businesses and technologies capable of actually delivering outcomes rather than simply promising them.
References
Levinson B, Australian Financial Review, Australia’s other pumped hydro project is facing delays, 12 May 2026, https://www.afr.com/policy/energy-and-climate/australia-s-other-pumped-hydro-project-is-facing-delays-20260511-p5zvo0
Williamson R, Renew Economy, Start date for Australia’s first pumped hydro project in 40 years delayed again, wind farm may be dumped, 13 May 2026, https://reneweconomy.com.au/start-date-for-australias-first-pumped-hydro-project-in-40-years-delayed-again-wind-farm-may-be-dumped/
Important Information
EnviroInvest Pty Ltd ACN 685 107 957 (“EnviroInvest”) is an Authorised Representative of Daylight Financial Group Pty Ltd ACN 633 984 773 (“DFGPL”) which is the holder of an Australian Financial Services Licence (AFS Licence No. 521404).
Information in this commentary is current as at date prepared unless otherwise stated. However, please bear in mind that investments can go up or down in value, and that past performance is not a reliable indicator of future performance. For more Important Information please refer to the Disclaimer section of this website.
This communication may contain general financial product advice. It has been prepared without taking into account your personal circumstances, and you should therefore consider its appropriateness in light of your objectives, financial circumstances and needs before acting on it.
If our advice relates to the acquisition or possible acquisition of a particular financial product, you should obtain a copy of and consider the Information Memorandum (IM) and/or Product Disclosure Statement (PDS) before making any decision.