As filed on the New South Wales website, the "Great Western Battery" project is an initiative by private company Neoen to construct a massive 500MW battery. As reported in Renew Economy, the large battery in Australia may be installed just outside of Sydney.

Neoen dubbed the Major Battery Energy Storage Device (BESS) to promote the creation of the Central-Orana Renewable Energy Field, the first such area to be created by the NSW government and capable of having as many as 3,000 MW of modern wind and solar projects installed in the region around the city of Dubbo.

The massive battery project is situated about 100km west of Sydney, near the site of the former Wallerawang coal-fired power station.

The 1,000MW Wallerawang coal-fired power plant was closed by EnergyAustralia in 2014, and Neoen's planned broad battery will be able to link to the 330kV substation that had previously operated the power station.

Neoen estimates the project to require an expenditure of approximately $300 and $400 million and to generate up to 200 new construction positions, with actual numbers to be decided as the design phase continues. The indicative timetable indicates that the battery development will begin in 2022, with service beginning in 2023.

Neoen has already built Australia's first big large-scale battery plant, partnering with Tesla to complete the Hornsdale Power Reserve, which has recently been extended to include 150MW/194MWh of energy storage, mainly devoted to energy reliability services.

The organization has also recently earned contracts for the installation of additional large battery systems in Victoria and ACT. The Victorian Large Battery Scheme will see the Geelong 300MW/450MWh grid, which would also include Tesla's Megapack Big Battery.