Beyond Lithium, Part 2: ESS Tech’s Iron Flow Battery

Clean Energy Group’s “Beyond Lithium” webinar series spotlights the emerging energy storage technologies that are expanding the grid’s capabilities beyond today’s lithium-ion batteries. Each session in the series will feature a leading non–lithium-ion storage company, offering a practical look at how their systems work, where they are being deployed, and how they compare on performance, cost, scalability, safety, and supply chain considerations. Participants will gain insight into the potential benefits, barriers, commercialization timelines, and policy frameworks shaping this evolving market.

This session will explore ESS Tech, Inc., a leading manufacturer of iron flow long-duration energy storage systems with multiple projects in development, including a 5 megawatt / 50 megawatt-hour battery system in Florence, Arizona with the utility Salt River Project. ESS’s Chief Executive Officer, Drew Buckley, will give an overview of their technology and answer questions from attendees. Clean Energy Group President and Executive Director Seth Mullendore will moderate.

Join us to better understand how diversifying storage technologies can strengthen grid resilience, advance energy affordability, and accelerate an equitable clean energy transition.