Origin Energy has started building the second stage of its AU$ 450 million (US$ 295.7 million), 240 MW/1,030 MWh four-hour duration battery at the Eraring Power Station, 120 km north of Sydney, Australia.
The second stage of the Eraring battery will add a 240 MW / 1030 MWh four-hour duration grid-forming battery to the 460 MW/1073 MWh two-hour duration first stage battery development already under construction, which is anticipated to come online at the end of 2025. When fully commissioned in early 2027, the combined energy storage of stage one and stage two of the Eraring batteries will be over 2 GWh.
Battery equipment will be supplied by Finnish technology group Wärtsilä, Balance of Plant Design and Construction services will be provided by Enerven, a subsidiary of SA Power Networks, while Lumea (the commercial arm of Transgrid) will complete the dedicated HV substation works. Eraring is Australia’s largest power station, supplying around a quarter of NSW’s energy needs. It is Origin’s only coal-fired generator.
