Australia has switched on its longest-duration grid battery to date, built with 144 Tesla Megapacks. The Limondale battery, operated by RWE in New South Wales, can discharge continuously for eight hours—four times longer than the two-hour batteries that currently dominate the country's grid storage fleet.
This marks the first time an Australian grid battery has reached the eight-hour mark, a significant step for renewable energy integration. Longer-duration storage helps smooth out supply gaps when solar and wind generation drop, and this project demonstrates a scalable path beyond the short-duration systems that have been the norm.
While the source does not provide details on capacity in megawatt-hours or the exact project timeline, the achievement highlights the growing role of Tesla's Megapack technology in pushing grid storage toward longer durations. The Limondale battery is now operational, setting a new benchmark for the Australian market.