en.Wedoany.com Reported - RWE Renewables Australia's Limondale battery energy storage system in New South Wales officially commenced operation on June 11, 2026. With a total storage capacity of at least 400 MWh and the ability to supply power for over 8 hours, it has become the longest-duration battery storage project in Australia.

Located near Balranald in southwestern New South Wales, the system consists of 144 containerized, utility-scale Tesla Megapack lithium-ion battery units. Each Megapack unit has a storage capacity of approximately 3.9 to 4.3 MWh. All units are equipped with grid-forming inverters, capable of generating stable voltage signals independently rather than tracking grid frequency. The system features an asymmetric charge-discharge design, allowing it to charge rapidly from the grid or the adjacent 314 MW Limondale solar farm using 100 MW of power, but with a discharge rate capped at 50 MW.

The Limondale BESS is the first project under the New South Wales Electricity Infrastructure Roadmap to secure a long-term energy service agreement for long-duration storage. The project was developed by RWE Renewables Australia, in collaboration with Tesla, Melbourne-based clean energy company Beon Energy Solutions, and Australian transmission companies Lumea and Transgrid. New South Wales Minister for Climate Change and Energy, Penny Sharpe, stated that the system will help integrate more renewable energy into the grid and exert downward pressure on electricity prices. Daniel Belton, CEO of RWE Renewables Australia, noted that the project marks a significant step forward for long-duration storage, contributing to a more reliable and resilient energy system.

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