Transgrid taps Hydrostor for backup power in Broken Hill

A rendered image of Hydrostor's Silver City Energy Storage Project (broken)
Render of Hydrostor's Silver City Energy Storage Project

Canadian long-duration energy storage developer Hydrostor has struck a deal with Transgrid that will see the 200MW/1600MWh Silver City Energy Storage Project (Silver City) provide back-up power to Broken Hill as early as 2027.

Related article: Hydrostor’s A-CAES a ‘game changer’ for Silver City project

The agreement between Transgrid and Hydrostor (through its Australian subsidiary A-CAES) was signed following Silver City being selected as the preferred option in Transgrid’s Project Assessment Conclusions Report (PACR).

Hydrostor vice president of origination and development Martin Becker said, “We are delighted by this new partnership with Transgrid and the recognition of Silver City’s value to the region and the community.

“This is another significant milestone in the development of this critical infrastructure project that will ensure the delivery of clean power and energy security to the Broken Hill region.”

Transgrid’s selection was based on an assessment of multiple energy storage solutions, determining that Silver City offered the highest net benefit and reliable clean energy supply for the region. The report concluded that Silver City would deliver approximately $286 million in net benefits over the 27-year assessment period.

The agreement requires Hydrostor to provide up to 50MW of capacity, representing up to 250MWh, from Silver City in the event of a planned or unplanned power outage.

Related article: Canada’s Hydrostor opens Australian HQ in Melbourne

In September, Hydrostor announced a binding agreement with Perilya, who own a local mining operation, to integrate Silver City’s advanced compressed air energy storage (A-CAES) technology with existing underground caverns at the Potosi Mine.

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