ESS Inc

ESS Inc (ESS Tech, Inc.) is a US manufacturer of non-lithium, iron-based flow batteries, founded in 2011 and headquartered in Wilsonville, Oregon, addressing long-duration energy storage for utilities, commercial and industrial sites and data centers that need many hours of dispatchable power without lithium supply-chain risk.

Its product line includes the Bridge iron-flow system for 2-16 hour storage, the Horizon system for 20-plus hour long-duration storage, and the COMMAND energy management software that monitors and dispatches deployed systems; the company has signed a contract for a 500 MWh deployment with Juniper Energy and states its systems are designed for a 20-year service life with minimal degradation.

1. Bridge system: iron flow battery for 2-16 hour short/medium duration storage.

2. Horizon system: iron flow battery for 20-plus hour long-duration storage.

3. COMMAND software: monitors and dispatches deployed storage systems.

4. Non-lithium chemistry: uses iron, salt and water to reduce supply-chain risk.

5. Long service life: systems designed for roughly 20 years with minimal degradation.

6. Utility-scale contracts: includes a 500 MWh deployment agreement with Juniper Energy.