ESS Tech signs LOI for partnership with Alsym Energy

ESS Tech (GWH) announced the signing of a letter of intent for a strategic partnership with Alsym Energy, a pioneer in non-flammable, high-performance sodium-ion batteries, to add 8.5 GWh of sodium-ion cells and modules to its portfolio. This next-generation battery solution is designed to address use cases traditionally served by lithium-ion systems – and those where lithium cannot go – but without the inherent thermal run-away risks associated with lithium chemistries. This partnership marks ESS’s entry into the short- and medium-duration BESS segment, a market historically dominated by lithium-ion. It meaningfully expands the Company’s addressable market beyond its established position in long-duration storage. The Alsym sodium-ion technology virtually eliminates thermal runaway risk and lowers total cost of ownership. In addition, the solution does not require complex HVAC systems, demonstrates high round trip efficiency, employs fast charge and discharge capabilities and offers a simpler, safer deployment profile for customers seeking superior stationary storage solutions.