SWIS

September 15, 2026
Trina Storage has been selected to supply the BESS for Stage One of Frontier Energy’s Waroona Renewable Energy Project.
September 3, 2026
Western Australia’s ERA has fined state-owned energy company Synergy AU$1.2 million (US$785,600) after a software error at the Kwinana BESS.
June 19, 2026
Developer BLT Energy has received development approval for the 800MW/4,800MWh Red Gully BESS in Western Australia.
June 16, 2026
Western Power has started construction on 18 community battery energy storage systems across Perth and Bunbury in Western Australia.
May 13, 2026
Utility-scale battery storage systems in Western Australia supplied 37.2% of peak demand on 9 May, marking one of the highest battery storage penetration levels recorded in an isolated grid globally.
May 5, 2026
The Australian government has announced the results of Capacity Investment Scheme Tenders 5 and 6 for WA, awarding contracts to 10 projects.
April 29, 2026
Western Australia to expand renewable energy and energy storage across the Southwest Interconnected System (SWIS). 
April 17, 2026
Synergy has submitted a hybrid renewable energy project to Australia’s EPBC Act, featuring a 500MW battery energy storage system (BESS).
February 25, 2026
RE Development Pty Ltd has submitted a development application for a 250MW/1,000MWh battery energy storage system (BESS) in Baldivis, Western Australia.
February 3, 2026
Western Australia’s ERA has proposed a Benchmark Reserve Capacity Price of AU$491,700/MW per year for the 2028-29 capacity year.

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