Alsym, ERITY sign 9 GWh sodium-ion mining deal

Alsym Energy and ERITY said they plan to deploy sodium-ion storage systems at mining projects in Tanzania, Saudi Arabia, Finland, and the United States, targeting applications including microgrids, mineral processing, mobile data centers, and electric mining equipment.

The deal covers microgrid power, critical mineral extraction, mobile data centers, electric mining equipment, and mobile BESS applications, with initial deployment planned across projects operated by Volt Resources and Resource Minerals International in the aforementioned national markets.

Alsym says its Na-Series platform is built for off-grid and remote sites and can be stored and transported at zero-percent state of charge. The company describes the chemistry as non-flammable, a characterization it positions against thermal runaway risks it attributes to lithium-ion batteries in high-temperature or remote environments.

The characterization originates with Alsym. The company did not provide independent validation for the claim. Some independent research on sodium-ion safety has found greater thermal stability than lithium-ion under certain conditions, but the picture is not absolute: a 2025 study found some sodium-ion configurations can still exhibit serious thermal runaway behavior, with outcomes dependent on state of charge and cell chemistry.

The sector’s appeal for sodium-ion adoption centers on diesel displacement. Mining remains one of the most diesel-intensive industries globally, and fuel costs make up a large share of operating expenses at remote and off-grid sites, though estimates of that share vary by source.

Alsym has cited figures as high as 30%–50% of operating costs. Australian industry reporting has put the figure closer to 15% for some listed miners.

ERITY, established in late 2025, describes itself as an integrated advisory firm covering geology, mining, and corporate advisory work across the project lifecycle.

The partnership follows two other commercial agreements Alsym has announced in the past two months: an 8.5 GWh partnership with ESS and a 500 MWh agreement with Juniper Energy. Alsym says the three deals together represent 18 GWh of announced commercial commitments, though the company has not disclosed an independently verified operating fleet figure.

Neither Volt Resources nor Resource Minerals International has issued a separate statement confirming the partnership beyond the details in the Alsym-ERITY release.