Australia's federal government will partly underwrite four lithium-ion battery projects in Western Australia (WA), boosting the state's energy storage capacity by 2.6GWh from late 2027.
Canberra is supporting the projects through its Capacity Investment Scheme (CIS), which sets a revenue floor on big battery projects for up to 15 years. The government has not revealed the specific revenue floors linked to the newly underwritten projects.
Australian renewable energy developer PGS Energy will build the largest of the four newly-underwritten batteries, a 1.2GWh energy storage system in Marradong. The company's Marradong battery will be co-located with a solar farm and connected to WA's South West Interconnected System (Swis), a grid stretching across its most populous regions, once it becomes operational.
French energy producer Neoen is also developing a 615MWh project just outside Perth, under the scheme. The company has been building large batteries across Australia, with public support, for multiple years. Its Collie Battery Energy Storage System is connected to Swis, and has been storing and discharging 877MWh of energy since October 2024.
The two other batteries underwritten on 20 March are smaller, with a combined capacity of 780MWh, and located in rural parts of the state.
The Australian government's latest funding announcement comes just months after it on 11 December 2024 underwrote eight other Australian battery projects capable of storing 3.6GWh of power under the CIS. Those projects were scattered across the country, covering three states but excluding WA.
Canberra will also underwrite another set of batteries, with a combined capacity of 16GWh, in September. Over 100 projects, with a combined capacity of 135GWh, have applied to be part of CIS' September funding round.