Hydrostor's 200 MW / 1,600 MWh compressed air energy storage project in Broken Hill has received AEMO registration, clearing a key hurdle for the novel long-duration technology. The Silver City Energy Storage Centre is designed to provide eight hours of backup capacity, aiming to stabilise the blackout-prone regional grid. The approval marks a significant step for diversifying Australia's storage portfolio beyond batteries and pumped hydro. It comes as NEM spot prices fell 28.9 per cent week-on-week to average $47.92/MWh, suppressed by mild conditions and a 50.4 per cent renewable energy share that underscores the growing need for such large-scale storage.
Meanwhile, the debate over who pays for the transition's enabling infrastructure intensified. The Australian Energy Regulator rejected Transgrid’s plan to recover over $1 billion in cost overruns for the Project EnergyConnect interconnector through a revenue determination revision. While the AER was not satisfied with the current proposal, it left the door open for the network operator to recoup costs through alternative regulatory mechanisms. The decision highlights the intense scrutiny on transmission project costs, a point echoed by Victoria’s former energy minister, who warned that cancelling the VNI-West project would guarantee a massive increase in consumer power bills.
Governments are also exploring policy levers to manage industrial energy use. The New South Wales government is investigating electricity tariff reforms to incentivise large gas consumers to adopt thermal energy storage. The initiative aims to lower decarbonisation costs for major businesses by shifting industrial heating processes to off-peak periods. On the technology front, ARENA is backing industrial innovation directly. Element Zero secured a $5 million ARENA grant for its green iron facility in Perth, supporting the scale-up of its low-temperature electrolysis process to produce five tonnes of iron per day.
At the distributed level, momentum for local storage solutions is building. ARENA has reached a 100-unit milestone for its community battery program and simultaneously allocated $23.2 million to three new projects in a second funding round. The initiatives are designed to soak up excess rooftop solar generation in suburban neighbourhoods, enhancing local grid stability and deferring network augmentation. This progress in deploying smaller, localised assets complements the development of grid-scale projects like Hydrostor's.
Globally, governments are firming up market support for clean capacity. The European Commission approved Germany's €35.2 billion capacity mechanism, which will fund generation, storage, and demand response through competitive tenders. Critically, new gas facilities must be hydrogen-ready and achieve climate neutrality by 2045 to qualify for support. This international policy direction provides a framework for Australia's own capacity investment discussions. The scale of deployment is also accelerating, with construction starting on a 1.6 GWh battery system in Germany.
Back home, the energy sector is navigating significant leadership renewal. New chief executives have been appointed at CS Energy, the Clean Energy Regulator, Ark Energy, and Western Power, with further senior changes at the CEFC, AEMO, and the AEMC. This widespread personnel shift occurs alongside political change, as the NSW Coalition's energy spokesperson announced his retirement just months before the state election. For market participants, several key regulatory consultations are now open, with submissions on AEMO's gas fee structure due next week.