About
At ESS Tech, Inc. (ESS), our mission is to accelerate the delivery and reliability of clean energy to meet growing demand driven by the electrification of the global economy and emergence of new, power intensive technologies. We deliver safe, sustainable, cost-effective, long-duration energy storage that powers communities, businesses and industries with clean, reliable energy anytime and anywhere it’s needed.
About ESS Inc.
ESS Inc. (NYSE: GWH) is the leading manufacturer of long-duration energy storage solutions using iron flow technology. ESS was established in 2011 with a mission to accelerate decarbonization safely and sustainably through longer lasting energy storage. Using easy-to-source iron, salt, and water, ESS technology enables energy security, reliability and resilience.
We build flexible storage solutions that allow our customers to meet increasing energy demand without power disruptions and maximize the value potential of excess renewable energy.
Our history
2011
- Company formed. Developed lab scale battery.
2012
- Awarded ARPA-e grant for development of iron-based battery.
2014
- Demonstrated 10,000+ operating cycles in the lab.
2015
- First commercial deployment.
2017
- Gen 1 Energy Warehouse™ product line launched.
2019
- S200 commercial battery module launched.
2020
- Installed S200 automated assembly line.
- Energy Center™ product line launched.
2021
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Warranty backed by investment grade insurer, Munich RE, that covers every product, everywhere.
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ESS listed on New York Stock Exchange under ticker symbol GWH.
2022
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ESS achieves ETL certification to the UL 9540A standard.
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ESS launches in Europe to meet demand for LDES.
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Strategic Partnership with Energy Storage Industries – Asia Pacific to deploy LDES in Australia.
2023
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ESS achieves ETL certification to the UL 1973 standard.
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ESS achieves ETL certification to EL 9540 standard.
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Honeywell invests in ESS, launching global collaboration to advance iron flow battery market adoption.
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ESS recognized as leading American clean technology exporter by U.S. Department of Commerce.
2024
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Energy Center is first LDES solution to receive IEEE 693 rating demonstrating resilience against seismic events.
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ESS successfully “lifts” its first Energy Center.
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$50M Manufacturing expansion funded by the Export-Import Bank of the United States’ Make More in America Initiative.
2025
- ESS launches Energy Base solution, offering up to 22 hours of energy storage and decoupling power capacity from energy capacity, unlocking low-cost, long-duration energy storage.
Based in Wilsonville, Oregon and founded by a team with deep experience in fuel cells, electrochemistry, advanced material science, and renewable energy, ESS is an established player in the rapidly growing LDES market. We set out to change the world by developing safe and sustainable long-duration energy storage made with easy-to-source iron, salt, and water. Since 2011, our team of scientists and engineers have developed, rigorously tested, validated, and commercialized iron flow technology.
Today, our flexible storage solutions are making energy resilience and renewable energy baseload possible around the globe. With ESS, customers can meet increasing power demand without disruptions to maximize the value potential of excess energy.
