ESS Inc., a global leader in long-duration energy storage solutions, is revolutionizing how energy is stored and utilized. Founded in 2011 and headquartered in Wilsonville, Oregon, ESS manufactures innovative iron-flow battery technology to support the transition to renewable energy. Listed on the New York Stock Exchange under the ticker symbol GWH, ESS provides safe, sustainable, and scalable energy storage systems that address the challenges of grid reliability and energy security.
The company aims to accelerate decarbonization by offering cost-effective and environmentally friendly energy storage solutions. ESS’s iron flow batteries, made from abundant materials like iron, salt, and water, are designed for long-duration applications, ensuring a reliable energy supply for utilities, industrial microgrids, and other sectors. By focusing on sustainability and innovation, ESS plays a significant role in shaping the future of energy.
Battery Technology
ESS Inc. specializes in iron flow battery technology, which stands out for its safety, sustainability, and longevity. Unlike traditional battery chemistries that rely on critical materials like lithium or cobalt, ESS’s batteries use iron, salt, and water as their primary components. This not only reduces environmental impact but also minimizes supply chain risks.
The technology operates on a liquid electrolyte system, where electrons are charged and discharged through the circulation of electrolytes. This design offers up to 12 hours of energy storage capacity and can unlimited cycling without degradation over a 25-year lifespan. ESS’s iron flow batteries are ideal for long-duration applications, including grid stabilization, renewable energy integration, and industrial microgrids.
- Energy Warehouse™: A compact, turnkey solution for commercial and industrial applications, providing up to 8 hours of energy storage.
- Energy Center™: A utility-scale system capable of delivering up to 12 hours of energy, with scalability to meet large energy demands.
These products are engineered for flexibility and cost-effectiveness, making them a reliable choice for a wide range of energy storage needs.
Recent Projects
In recent years, ESS has achieved significant milestones that highlight its leadership in the energy storage industry. In December 2024, the company celebrated the commercial launch of its Energy Center product, delivering systems to a major utility in Florida and completing a demonstration project for Portland General Electric. This marked a major step forward in ESS’s mission to deploy long-duration energy storage at scale.
Additionally, ESS expanded its manufacturing capacity in Oregon with a $50 million financing package from the U.S. Export-Import Bank. The company also partnered with Energy Storage Industries Asia Pacific to accelerate iron flow battery deployments in Australia, aiming for an annual production target of 400MW.
Notably, ESS’s Energy Center received the Smarter E Innovation Award and achieved the IEEE 693-High rating for seismic resilience, further solidifying its position as a reliable and innovative energy storage solution.
Investors
ESS Inc. has attracted significant investment from leading organizations and venture capital firms. Key investors include Breakthrough Energy Ventures, SoftBank Energy, and BASF Venture Capital, all of whom have supported the development and expansion of ESS’s iron flow battery technology.
The company’s strategic partnerships with industry leaders like Honeywell have also played a critical role in advancing its technology and accelerating its commercial deployment. ESS’s ability to secure funding and form collaborative relationships underscores its potential to transform the energy storage landscape.
Business Details
Location: Wilsonville, Oregon, USA
Website: https://essinc.com
LinkedIn: https://www.linkedin.com/company/essinc
