Zinc battery storage player Eos confirms start of expansion at Pittsburgh factory

LinkedIn
Twitter
Reddit
Facebook
Email
US Secretary of Energy Jennifer Granholm visiting Eos’ R&D facilities in New Jersey last year. Image: Eos via Twitter.

Eos Energy Enterprises has said that equipment and machinery will begin arriving next month as the zinc-based battery storage company expands its manufacturing facility near Pittsburgh, Pennsylvania, US. 

Eos had previously said it would triple the current production capacity of its plant in Turtle Creek, bringing it up to 800MWh of its Znyth brand aqueous zinc batteries. Znyth units offer up to three hours storage duration each but can be ‘stacked’ to create storage systems with up to 12 hours storage and discharge duration at full power. 

The manufacturer will add an extra 46,000 square feet of factory space and hire at least 125 new employees, it said yesterday. The land has been rented on a five-year lease from the Regional Industrial Development Corporation of Southwestern Pennsylvania.

Equipment is expected to arrive in March and the site expansion could be completed as early as this September, Eos claimed.

This article requires Premium SubscriptionBasic (FREE) Subscription

Try Premium for just $1

  • Full premium access for the first month at only $1
  • Converts to an annual rate after 30 days unless cancelled
  • Cancel anytime during the trial period

Premium Benefits

  • Expert industry analysis and interviews
  • Digital access to PV Tech Power journal
  • Exclusive event discounts

Or get the full Premium subscription right away

Or continue reading this article for free

“We’re bringing quality green jobs to the region and building a renewable energy hub in the middle of coal country,” Eos CEO Joe Mastrangelo said.

Eos has already ramped up production from 65MWh annual capacity in 2020 to 260MWh last year. The third iteration of its battery systems is expected to begin performance testing this quarter and in December Eos secured a supply deal for high purity zinc-bromide — a key component of the batteries’ electrolyte — with chemicals group TETRA Technologies, from US-based sources. 

The battery maker listed on NASDAQ last year. It claimed US$137.4 million of customer orders had been booked during 2021 including its biggest single customer order yet, a 300MWh deal with EPC firm Blue Ridge Power. 

During 2021 Eos also received a US$100 million investment commitment from Koch Industries venture capital arm Koch Strategic Platforms, as well as a US$25 million equipment financing deal with debt and equipment financing company Trinity Capital, which the battery company said would go towards purchasing equipment for the Turtle Creek plant. 

Its manufacturing operations had been started up as a joint venture (JV) with nuclear industry technology company Holtec, but Eos bought out its partner to own the JV, called HI-POWER. The Turtle Creek plant is on a former nuclear equipment manufacturing facility site which was used by Westinghouse, one of Holtec’s partners. 

Eos is one of the founder members of the Long Duration Energy Storage Council, an international collaboration between energy storage companies, end-user customers and other stakeholders, which tech giants Google and Microsoft recently signed up to

Read Next

July 17, 2026
Zinc hybrid cathode battery and storage system maker Eos Energy Enterprises has announced a strategic partnership with the US Department of Defense (DoD) to “enhance the resilience of national defence infrastructure.”
Premium
July 17, 2026
BW ESS’ executive director Roberto Jimenez discusses the company’s recently-announced first Germany project, in Klostermansfeld, Saxony-Anhalt, which could be one of Europe’s largest when completed in 2028.
July 17, 2026
The Port of Newcastle has become the first port in New South Wales, Australia, to be approved to safely store grid-scale lithium-ion battery storage systems.
July 15, 2026
Avantus, with Fluence, is progressing on two solar-plus-battery energy storage system (BESS) projects in California, US.
Premium
July 15, 2026
ESN Premium speaks with Ben Potter at CO2 Battery startup Energy Dome about the company’s latest project with Google and why the market is turning in favour of long-duration energy storage (LDES).