ESS signs 8.5 GWh Sodium‑Ion Deal with Alsym
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- ESS signed a letter of intent with Massachusetts‑based Alsym Energy to add 8.5 GWh of sodium‑ion battery cells and modules to its storage portfolio.
- Alsym Energy states its sodium‑ion batteries are non‑flammable, avoiding thermal‑runaway risks of lithium‑ion and eliminating the need for complex HVAC or fire‑suppression systems.
- ESS plans to use the sodium‑ion cells for short‑ and medium‑duration storage, complementing its existing iron‑flow batteries that serve long‑duration (8‑24 h) applications.
- Alsym Energy highlights that the sodium‑ion cells are built with materials sourced without foreign entities of concern, giving utilities a secure supply chain.
- Alsym leveraged an AI‑driven design platform to speed development and market entry of its sodium‑ion technology.
Why it matters: Utilities and data‑center operators gain a cheaper, safer storage solution that sidesteps lithium supply constraints, while lithium‑ion manufacturers lose a market segment; the shift lowers project costs by eliminating HVAC and fire‑suppression expenses.
