Australia's Largest Ever 4.8GWh Battery Project Wins Development Approval in Western Australia
Western Australia just greenlit what would become the largest battery energy storage system ever proposed in the country. Perth-based developer BLT Energy has received development approval from the Regional Development Assessment Panel for the 800MW/4,800MWh Red Gully BESS — a project that would nearly double the capacity of Australia's current storage king, the 2,400MWh Collie BESS.
Red Gully: By the Numbers
The scale of this Western Australia 4.8GWh battery storage project demands attention. Phase 1 alone will deliver 400MW of power with 2,400MWh of storage capacity — matching Collie's entire output in a single phase. Once both phases are complete, Red Gully will stand at 800MW/4,800MWh, making it one of the largest battery installations in the Southern Hemisphere.
The project site sits in the Shire of Gingin, strategically adjacent to Western Power's Regans Terminal — a major grid infrastructure asset scheduled for completion in 2027. This location positions Red Gully to directly feed into the state's Clean Energy Link-North transmission upgrade, a billion-dollar program designed to unlock renewable energy zones across WA's vast southwestern grid.
Perfect Timing: Coal Retirement Meets Battery Readiness
BLT Energy has deliberately aligned Red Gully's construction timeline with Western Australia's coal exit strategy. Phase 1 commissioning is targeted for 2028-2029, leading directly into the scheduled retirement of state-owned coal-fired power stations by 2030. This is not coincidental — it reflects a growing pattern across Australia where battery storage projects are being engineered as direct replacements for baseload coal generation. Shop now for AGAIC POWER's grid-scale LiFePO4 battery modules designed for demanding utility applications.
Record-Breaking Battery Penetration
The approval lands against a backdrop of extraordinary battery performance in WA's South West Interconnected System (SWIS). In May 2026, utility-scale battery storage supplied a record 37.2% of peak demand — described by state energy officials as "one of the highest battery storage penetration levels recorded in an isolated grid globally." That figure excluded behind-the-meter battery contributions, meaning the actual storage share was even higher.
On the same day, renewables supplied 78% of total generation, demonstrating that WA's isolated grid — unable to import power from neighboring states — is proving that high renewable penetration with battery backup is not just theoretically possible but operationally proven.
Australia's Storage Arms Race
Red Gully is far from the only mega-project advancing through Western Australia's pipeline. The federal Capacity Investment Scheme (CIS) Tenders 5 and 6 recently awarded contracts to 10 projects delivering 3,683MWh of standalone battery storage, representing AU$5 billion in new infrastructure investment. Projects include Neoen's 200MW/1,600MWh Yathroo BESS and a 200MW/1,518MWh Collie hybrid from Enpowered and Plenary Group.
Combined with state utility Synergy's existing portfolio — which already exceeds 3,500MWh across its Collie and Kwinana installations — Western Australia is quietly assembling one of the world's most concentrated battery storage clusters on a per-capita basis.
Community and Environmental Integration
BLT Energy has committed to working with the Shire of Gingin, local residents, and Traditional Owners to define community benefits over the project's 30-year operational lifespan. With development approval secured, the company will now progress detailed engineering design and project financing — the two remaining gates before construction can begin on what would be a transformative piece of Australia's clean energy infrastructure. Explore our collection of energy storage solutions built for projects of every scale.
For the global storage industry, Red Gully is more than just another large battery. It's evidence that standalone storage can earn regulatory approval and community acceptance at unprecedented scale — and that isolated grids, once considered the hardest cases for renewable integration, may actually become the strongest proving grounds for battery storage's capabilities.
