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ESS Partners with Alsym Energy to Deliver 8.5 GWh of Non-Lithium Battery Energy Storage Solutions

  • ESS Tech, Inc. signed a letter of intent to partner with Alsym Energy to integrate 8.5 GWh of sodium-ion cells & modules into its portfolio.
  • The collaboration enables ESS to enter the short- & medium-duration battery energy storage segment, expanding beyond its established long-duration market.
  • Alsym's non-flammable Na-Series technology eliminates thermal runaway risks & reduces total cost of ownership by removing the need for complex HVAC systems.
  • The combined platform unifies Alsym's sodium-ion solution for high-power, fast-cycling applications with ESS's Energy Base® iron flow technology for 8–24 hour long-duration storage.
  • Alsym's batteries utilize non-foreign entity of concern sourced materials & were developed using a proprietary, physics-informed AI platform to accelerate innovation.
  • The partnership targets utilities, independent power producers, data centers, & commercial/industrial customers seeking safe, American-made energy storage solutions.
  • ESS aims to become a full-spectrum, non-lithium provider capable of addressing the entire duration curve from hours to days without compromising safety or economics.