Akaysha Energy has successfully brought the first 350 megawatts (700 megawatt-hours) of the Waratah Super Battery online, marking a major milestone in the development of what is now the world’s most powerful battery in terms of both output and storage. Commissioned by the NSW Government, this advanced energy infrastructure acts as a vital “shock absorber” to safeguard the electricity grid during extreme events such as bushfires, lightning strikes, and heatwaves.
Located at the site of the former Munmorah coal power station, the battery will ultimately reach 850 MW/1680 MWh capacity later this year. At full scale, it promises to deliver 700 MW of continuous power and 1,400 MWh of usable energy—enough to supply 970,000 homes for an hour or power 80,000 homes for an entire day.
The Waratah Super Battery, capable of fully charging in just two hours and instantly discharging power into the grid, forms a key component of the System Integrity Protection Scheme (SIPS). It works alongside upgraded transmission infrastructure, paired generation services, and advanced control systems operated by TransGrid to maintain grid stability.
Appointed by EnergyCo in 2022, Akaysha began construction in 2023. The project has since driven over $1 billion into the local economy and supported more than 700 indirect jobs.
Delivery partners include EnergyCo, TransGrid, Consolidated Power Projects, Wilson Transformer Company, Hitachi Energy, and Generator Property Management.
The project’s oversizing strategy also allows Akaysha to explore additional revenue avenues, helping reduce long-term costs for NSW consumers.
