Switzerland-based Energy Vault has secured contracts from ACEN Australia to deploy two large-scale BESS.

The systems total 200MW/400 megawatt-hours (MWh) and will support the 720MW New England solar project near Uralla in New South Wales (NSW), one of the largest in Australia’s national electricity market.

Construction of the BESS projects will begin in H2 2024 and commercial operations will commence in 2025 and 2026.

The finalisation of contracts is under way, with formal execution expected in the first half of May 2024.

The agreement includes the installation of a 50MW/100MWh BESS and a 150MW/300MWh BESS.

These systems will store and dispatch renewable energy daily during peak consumption times.

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The New England BESS project is supported by the NSW Government’s emerging energy programme and aligns with ACEN’s strategy to develop more than 1GW of projects in Australia.

The facility completed its first stage in 2023, adding 400MW of solar capacity to the grid.

Upon completion of the second stage, it will produce 1,800 gigawatt-hours of renewable energy annually.

In 2023, ACEN Australia secured a 20-year energy service agreement from the NSW Government’s renewable energy and storage auction to support the project.

Energy Vault chairman and CEO Robert Piconi stated: “ACEN Australia’s New England solar is a critical source of renewable energy for the NSW region, and we are proud to play a role in ensuring its ability to reliably provide the region with clean power in the most efficient and cost-effective manner possible.

“These deployments, and the tight timelines under which they will be delivered, stand as a testament to Energy Vault’s commitment to a customer-centric approach to energy storage as well as evidence of the growing global demand for reliable and effective energy storage solutions.

“We see today’s agreement as just the first step in a long and fruitful relationship with ACEN and their renewable power generation projects moving forward.”

The BESS units, part of Energy Vault’s B-VAULT integrated solutions, will incorporate Siemens S120 inverters.

In April 2024, Energy Vault and NV Energy commenced commercial operation of the Reid Gardner BESS in the US.

Located in Moapa, Nevada, the BESS project has 220MW/440MWh of capacity and can store energy for two hours.