Battery storage wins every contract in South Australian firming tender open to gas

Battery storage wins every contract in South Australian firming tender open to gas Gas generators were invited, then shut out — batteries claimed all capacity in a South Australian tender, signalling a cost shift in high-renewables grids. Battery storage projects swept every contract in a South Australian grid firming tender that was explicitly designed to allow gas-fired generation to compete, the state government announced on Friday (2026-05-29). No gas project won a single megawatt.⁴ South Australia now sources more than 70% of its electricity from renewables, and the tender was designed to secure dispatchable capacity that could backstop a grid where wind and solar routinely meet the vast majority of demand, the government said. With thermal plant operators facing shrinking running hours and worsening economics, gas developers had positioned themselves as the default backstop following the state's exit from coal. Batteries undercut them on every contract.⁴ The winning projects have not been named publicly. But the state government said they would make a "meaningful contribution to system reliability" while offering "strong value for SA electricity consumers" — phrasing that points to price as the decisive variable, not just technical capability.⁴ The clean sweep carries a specific implication for gas project developers: explicit carve-outs are no longer needed for batteries to beat thermal competitors in competitive auctions, at least for the duration ranges this tender covered. Gas was on the ballot. It lost.⁴ Federal energy minister Chris Bowen said on Tuesday (2026-05-26) that surging interest from data centre developers could help struggling wind projects secure power purchase agreements and proceed to construction. Several wind farms had been unable to land those agreements despite government underwriting, Bowen noted, leaving them stranded at the development stage.³ The data centre demand signal is also reshaping battery storage investment globally. The U.S. added a record 57.6 GWh of new battery storage capacity in 2025, bringing total deployed capacity to 166.1 GWh, according to the Solar Energy Industries Association.² The group projects annual deployments will reach 110 GWh by 2030, with a meaningful share driven by data centre clients. Energy storage company Fluence is engaged in over 30 GWh of data centre-related projects globally, said CEO Julian Nebreda, while Tesla recorded $430 million in revenue from selling storage systems to Elon Musk's xAI last year.² The Electric Power Research Institute projects data centre power demand could reach between 9% and 17% of U.S. electricity supply by 2030, equivalent to up to 790 TWh — compared with around 4% at the time of the Reuters report in May 2026. That trajectory is pulling capital into both front-of-meter and behind-the-meter battery systems across multiple grids simultaneously.² In Europe, EDF on Wednesday (2026-05-20) described electrification as "imperative" for France following the energy shock from the Iran war. The state-run utility announced a plan to lift power demand by 5.5 TWh, or 1% per annum, with new heat pumps and electric trucks potentially adding 0.5 TWh a year. EDF said it would offer "turnkey sites" with grid connections to new industrial customers.¹ The common thread across Australia, the U.S. and France is that firming capacity and flexible demand are now the scarce inputs — not generation itself. South Australia's tender result fits that pattern cleanly. But the auction covered short-duration firming requirements, and batteries become progressively less competitive as storage duration extends beyond four hours. Whether gas retains an economic advantage in the long-duration segment remains a live question for the next round of procurement.⁴ The next test arrives when a neighbouring Australian state runs a comparable tender. South Australia's result will be difficult to dismiss as an outlier if the outcome repeats at scale.⁴