The company said the contract supports national defense power resilience. It was awarded through a partnership with the Department of War.
President Donald Trump highlighted the award on July 15, 2026. He spoke at Senator Dave McCormick’s 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. Yeah we’re building a golden dome over our country and its going to be a very effective one,” said President Donald J. Trump.
The first deployment will use Eos’ Z3 storage system. It will be installed as a prototype at a critical site.
Eos said the system supports resilient, long-duration power. The goal is stronger readiness for defense missions.
The company said the deployment will test American-made storage. The program can scale as defense requirements change.
“This award validates the strategy we’ve built around American technology innovation, manufacturing and supply chains,” said Joe Mastrangelo, Eos Chief Executive Officer. “Today, we’re proving that America can still manufacture advanced technology at scale and deliver for our nation’s most critical missions.”
Eos builds and assembles the technology in Pittsburgh, Pennsylvania. Its system uses non-flammable aqueous zinc chemistry.
The company said the product has about 91% domestic content. It also relies on a largely U.S.-based supply chain.
Eos said the system is Section 842 NDAA-compliant. It also said the product is FEOC-compliant.
“We spent the last year building the relationships, compliance foundation and technical proof points the Department of War requires,” said Michelle Buczkowski, Eos Chief Administration Officer. “This award reflects that work. Eos is ready to deliver for the Department’s mission at scale.”
Eos framed reliable power as a defense readiness issue. Long-duration storage can help facilities maintain operations.
The company said the technology can improve energy security. It also supports missions that need uninterrupted power.
“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,” said Senator Dave McCormick.
Eos is expanding production at its Thorn Hill facility. The site is located in the Pittsburgh region.
The company’s second battery line is now in commercial production. Thorn Hill adds automated capacity for the Z3 platform.
Eos is targeting 8 gigawatt-hours of annual production capacity. That capacity would be based in Allegheny County.
The facility supports the company’s domestic supply-chain strategy. Eos also plans 1,000 high-quality jobs across the region.
