Key Takeaways:
Eos Energy Enterprises won a Department of War contract to supply zinc-based long-duration battery storage for the Golden Dome missile defense system, marking one of the first deployments of commercial energy storage technology for US national security infrastructure.
Eos Energy Enterprises Inc. was awarded a Golden Dome for America contract by the Department of War to integrate its Z3 zinc-based long-duration energy storage systems into the nation's missile defense shield, the company said Wednesday. The initial deployment will be a prototype at a critical military installation, with the program structured to scale as defense needs evolve.
"This award validates the strategy we've built around American technology innovation, manufacturing and supply chains," Joe Mastrangelo, chief executive officer of Eos, said in a statement. "Today, we're proving that America can still manufacture advanced technology at scale and deliver for our nation's most critical missions."
President Donald Trump highlighted the award during Senator Dave McCormick's Defense and National Security Summit in Carlisle, Pennsylvania. "Eos in Pittsburgh just agreed to a multi-million-dollar partnership with the Department of War to build energy storage technology in support of our Golden Dome missile defense," Trump said.
The Z3 system uses a non-flammable aqueous zinc chemistry with roughly 91 percent domestic content and a predominantly US-based supply chain, making it compliant with Section 842 of the National Defense Authorization Act and foreign entity-of-concern rules. Eos manufactures and assembles the systems at its Thorn Hill facility in the Pittsburgh region, where its second battery line recently entered commercial production. The company is targeting 8 gigawatt-hours of annual manufacturing capacity in Allegheny County and expects to create 1,000 jobs across the region.
The Golden Dome initiative is a multi-billion-dollar national missile defense program. The Space Development Agency separately awarded roughly $1.75 billion this week for satellite-based missile tracking, with Colorado-based Sierra Space receiving $798 million and Florida-based L3Harris receiving $955 million to build 18 space vehicles each, according to a separate announcement. Eos' role focuses on ground-based energy resilience — ensuring that radar, command-and-control, and interceptor sites maintain uninterrupted power during extended operations.
Long-duration energy storage, defined as four to 16-plus hours of discharge, has become a strategic capability for defense infrastructure because it can maintain operational readiness during grid outages or attacks on power infrastructure. Eos' zinc chemistry offers an alternative to lithium-ion batteries, which carry fire risks and rely on supply chains dominated by China. The company's system is classified as non-flammable and uses non-precious earth materials.
"We spent the last year building the relationships, compliance foundation and technical proof points the Department of War requires," Michelle Buczkowski, chief administration officer at Eos, said. "This award reflects that work. Eos is ready to deliver for the Department's mission at scale."
Senator Dave McCormick, who hosted the summit, said: "The Golden Dome should be built on American technology. Eos' technology will help secure the power infrastructure our military depends on, while creating good jobs right here in Pennsylvania."
Eos separately disclosed preliminary second-quarter results, expecting record quarterly revenue and record backlog. The company's Battery Line 2 at Thorn Hill is now in commercial production, and it completed site acceptance testing for half of its bipolar automation line, with full commissioning expected this month.
The contract positions Eos within a growing trend of defense agencies procuring commercial clean energy technology for mission-critical applications. As the US military expands its reliance on radar networks, satellite ground stations, and data centers, the need for resilient, long-duration backup power that does not depend on diesel supply chains is likely to increase. Eos shares trade on the Nasdaq under the ticker EOSE.
This article is for informational purposes only and does not constitute investment advice.
