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U.S. Department of Energy Announces $303.5 Million Loan Guarantee for Eos Energy’s Advanced Battery Storage Project

Source： Energy Storage Pro

Average reading time for this story is 2 minutes

The U.S. Department of Energy (DOE) has finalized a $303.5 million loan guarantee to Eos Energy Enterprises, Inc. (Eos) to support the construction of two state-of-the-art production lines for the next-generation Eos Z3™ zinc-bromine battery energy storage systems (BESS). The facilities, located in Turtle Creek, Pennsylvania, are expected to manufacture enough batteries annually to meet the electricity needs of approximately 130,000 homes.

This initiative, part of the Biden-Harris Administration’s Investing in America agenda, underscores the DOE’s commitment to innovative energy solutions and job creation. Should additional approvals be granted, two more production lines in Duquesne, Pennsylvania, may be included in the project.

U.S. Secretary of Energy Jennifer M. Granholm highlighted the strategic importance of the loan, emphasizing how it bolsters national energy security and supports the ongoing manufacturing boom initiated by the Biden-Harris Administration. “This project will not only strengthen our energy security but also continue to deliver manufacturing opportunities for generations,” Granholm said.

The four planned production lines will generate 8 GWh of storage capacity annually by 2027. This output will be sufficient to supply electricity to over 300,000 homes instantaneously or meet the annual needs of around 130,000 homes with daily charging and discharging. The project is expected to create up to 1,000 jobs, including unionized positions with the United Steelworkers, further boosting the regional economy.

Eos Energy’s batteries offer an alternative to traditional lithium-ion technologies by providing long-duration, grid-scale storage. The Eos Z3™ batteries are designed to be non-flammable, require no active cooling, and have a lifespan of up to 6,000 charge/discharge cycles. These features make the batteries a cost-effective and reliable option for integrating renewable energy into the grid. Additionally, the Eos batteries avoid reliance on scarce critical minerals like lithium, ensuring a more stable supply chain.

Eos has also committed to sourcing nearly 100% of its materials from the U.S. and is actively engaging with local communities through its Clean Energy Careers Program. The initiative targets local schools and veterans’ groups, offering apprenticeship and internship opportunities aimed at long-term careers in clean energy.

The loan guarantee is provided under the DOE’s Title 17 Clean Energy Financing Program, which supports innovative energy and supply chain projects. This commitment reflects the administration’s broader goal of directing 40% of clean energy investments to disadvantaged communities, in alignment with the Justice40 Initiative.

As of November, the DOE has received 212 active applications for projects totaling over $324 billion in requested loans, further advancing the country’s clean energy and infrastructure efforts.

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