Wärtsilä Expands Eraring Battery Storage Project in Australia

Origin Energy's Eraring power station in New South Wales, Australia, will see a significant battery storage expansion. Wärtsilä secured a contract to deliver the project's fourth stage, adding 360 MWh of capacity. Scheduled for completion in early 2027, the expansion raises the Eraring battery's total capacity to 700 MW / 3,160 MWh. This makes it one of the largest battery energy storage systems globally. The expanded battery system will connect to Australia's national electricity market. It will provide essential grid services, including frequency regulation and enhanced system strength. These services are crucial for maintaining grid stability as renewable energy sources increase and coal-fired power plants retire. The project aims to support a transition to a power grid reliant on renewable energy. Wärtsilä's involvement underscores the growing importance of large-scale energy storage. The company will begin work on the fourth stage in December 2025. The project will help balance the grid and ensure reliable power supply. The Eraring battery expansion represents a major investment in Australia's energy infrastructure.