Eos and FlexGen partner for zinc-based BESS solutions

LinkedIn
Twitter
Reddit
Facebook
Email

Eos Energy Enterprises has signed a joint development agreement (JDA) with FlexGen Power Systems to develop a fully integrated battery energy storage system (BESS) solution using Eos’ zinc batteries and Flexgen’s Energy Management System (EMS).

FlexGen is the first major system integrator to announce a deal with a non-lithium-ion battery company that Energy-Storage.news is aware of.

Eos and FlexGen plan to develop and commercialise a comprehensive, integrated US BESS solution. This solution will combine Eos’ Z3 zinc-based long duration energy storage (LDES) systems, a US inverter and transformer package, with FlexGen’s HybridOS EMS.

This news follows the announcement that Eos received its first loan advance of US$68.3 million from the Department of Energy’s (DOE) Loan Programs Office (LPO) for the Mon Valley Works expansion project in Pennsylvania, US.

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

As reported by Energy-Storage.news, the overall funding of US$303.5 million will support around 80% of the cost of Project American Made Zinc Energy (AMAZE), the company’s roadmap to creating 8GWh of annual production capacity from automated lines by 2027.

Eos also secured a 400MWh standalone storage order with International Electric Power (IEP), which will be deployed at Haybarn Energy Reliability Centre, located at Marine Corps Base Camp Pendleton in San Diego County, California. The government of California approved a US$42 million grant to IPP IEP for the project.

Eos’ recent announcement confirms that the Haybarn Energy Reliability Centre will use the company’s Z3 Cubes, which the company claims are non-flammable and do not require cooling systems.

This string of recent activity could mean good news for Eos, which saw a low-revenue Q3 this year compared to last year. The company attributed the news to supply chain issues related to the Z3 cube. Creating a reliable, domestic supply chain for the technology could prove profitable for the company.

In April, FlexGen partnered with IPP Arclight and its subsidiary Infinigen Renewables to deploy a PV co-located 15MW BESS project in Puerto Rico. The BESS will utilise the system integrator’s HybridOS EMS.

Energy-Storage.news covered the November 2023 announcement that FlexGen and BESS-focused cell manufacturer Hithium made a 25GWh two-way agreement for battery supply and EMS. Of this, 10GWh will be batteries sold by Hithium to FlexGen, making it one of the year’s biggest offtake agreements between cell suppliers and system integrators.

3 November 2026
Málaga, Spain
Understanding technology and supplier selection for Europe’s utility-scale PV market in 2027. PV ModuleTech Europe 2026 is a two-day conference that tackles these challenges directly, with an agenda that addresses all aspects of PV module, inverter and battery supplier selection; product availability, technology offerings, supply chain traceability, quality assurance, factory auditing, system reliability, and supplier bankability.
22 February 2027
InterContinental London - The O2, London, UK
The Future of Energy Storage Starts Here Three days in London where developers, IPPs, investors, utilities and the manufacturers building the technology come to close deals, not swap business cards. If you need to be in the room with the people deploying capital into European storage, this is that room.

Read Next

October 23, 2026
Tech giant Google and distributed energy resource (DER) platform Voltus have announced an expanded agreement to build a 1GW virtual power plant (VPP) in the US.
October 23, 2026
German home energy storage and virtual power plant (VPP) company sonnen GmbH, sold by gas major Shell in August, has filed for insolvency.
October 22, 2026
In recent North American sodium-ion news, Hithium is entering the Canadian market with two BESS solutions, while Peak Energy has closed a Series B financing round led by GM.
October 22, 2026
Science safety leader UL Solutions has announced a new certification pathway intended to help manufacturers of modular direct current (DC) battery energy storage systems (BESS).
Premium
October 21, 2026
IndiGrid COO discusses India’s BESS growth, challenges, tariff pressures, safety standards and localisation as the market scales up.