DOE Provides Loan Guarantee for Two Eos Battery Production Lines

The United States Department of Energy has closed a $303.5 million loan guarantee for Eos Energy Enterprises Inc. (Eos) to build two stationary battery production lines in Turtle Creek, Pennsylvania.

The two facilities, according to the DOE, will produce enough Eos Z3, utility- and industrial-scale zinc-bromine battery energy systems (BESS) to cover the annual electricity needs of approximately 130,000 homes.

“Pending additional LPO [Loan Programs Office] approvals and completion of an Environmental Assessment pursuant to NEPA, two additional lines in Duquesne, Pennsylvania, may also be included as part of the loan guarantee”, the DOE said in a statement.

All four lines of the project are expected to manufacture 8 GWh of storage capacity annually by 2027, enough to provide electricity to over 300,000 average U.S. homes instantaneously or meet the annual electricity needs of approximately 130,000 homes if fully charged and discharged daily, the DOE said.

Today’s energy storage market is nascent but rapidly growing and is dominated by lithium-ion and lithium-iron-phosphate battery technologies, which typically serve short-term duration applications (approximately 4 hours), the DOE said. “Eos’s zinc-bromine Eos Z3 batteries provide alternative battery chemistry to lithium-ion, lead-acid, sodium-sulfur, and vanadium redox chemistries for stationary battery storage applications”, it said.

The technology is designed for long-duration grid-scale stationary battery storage. Eos batteries are non-flammable and do not require active cooling to operate, the DOE said.

“The batteries can achieve 100 percent depth of discharge, do not degrade based on age, and are rated for 6,000 charge/discharge cycles before degradation. LPO financing will support manufacturing Eos’s generation battery system, the Eos Z3, which is more energy-dense and cost-efficient to produce than Eos’s previous models”, the DOE said.

According to the DOE, Eos expects to source nearly 100 percent of the materials for the Eos Z3 battery in the U.S., making the product more resilient to market volatility and supply chain risks.

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