About Eos

From the beginning, Eos has been committed to designing and deploying a reliable, safe, and sustainable battery system. Our storage solutions are built on relentless testing and learning, proven to perform and made to be safe, scalable and sustainable. Eos is headquartered in Edison, NJ and brings together some of the industry’s brightest talent to tackle one of the world’s greatest challenges.

Our Quest. We will not rest until the world has sustainable and affordable energy on demand.

Our Ethos. We believe in the power of great chemistry– in our products and our team.

Our Drive. We invent, iterate & deliver the best solutions for the future of energy, today.


At Eos, we’re on a mission to accelerate clean energy by developing and deploying storage solutions that deliver the reliable and cost-competitive power that the market expects in a sustainable way.

We Are Ready. Ready to Scale. Ready to Deploy. Ready to Help.


When Eos was founded in 2008, renewables held out the promise of delivering endless clean energy but weren’t reliable enough and costs were not competitive with carbon-based generation. Armed with patents for a membrane-free zinc battery technology, Eos was founded to help change that. That’s the opportunity we’ve been pursuing over the last decade—built on relentless testing and learning, Eos now has a proven, safe, next-generation storage solution that’s ready to help accelerate and scale the clean energy transition.


Eos Company Timeline


Znyth patents registered. Eos founded by CEO Michael Oster and Inventor Steven Amendola



New York State Energy Research & Development Authority funded prototype testing with DNV GL at the Battery & Energy Storage Technology Consortium



New York State Energy Research & Development Authority funded prototype testing with Engie in Belgium



Commercial launch of the Eos Aurora® DC Battery System and Energy Stack enclosure at Distributech

Jan 2017


Major utilities begin to install Eos grid-scale energy storage

July 2017


250 kW / 1MWh Eos Aurora Gen 1.0 system

Oct 2017

Aurora Gen 2.0 Launched

30kW│120kWh system shipped for 1st ever DC-coupled solar + storage pilot

Sept 2018

West Caldwell Microgrid 2.0

300kW│1200 kWh Gen2.0 system deployed at PSE&G West Caldwell Microgrid

Jan 2019

Gen 2.0 Global Deployment

Eos deploys 7 Gen2.0 systems in the US with major utilities and renewable energy developers

May 2019

Opening of HI-POWER Production Facility

Eos builds 1GWh production facility in Pittsburgh, PA in a joint venture with Holtec International

Jan 2020

Gen 2.3 Production

Optimized enhancements result in 60% higher output, batteries now 100% made-in-USA

June 2020


Eos has assembled an executive team focused on accelerating the commercialization of the next-gen Eos Aurora solution. With decades of diverse experience in the energy industry and deep expertise executing complex projects around the world, the management team is ready to deliver systems at scale to meet the growing demands of the global storage market.

Board of Directors

Russ Stidolph

Russell Stidolph is the founder and Managing Director of AltEnergy, LLC a private equity firm focused on alternative energy...

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Jim Hughes

Mr. Hughes has served as Chief Executive Officer and Managing Director of Prisma Energy Capital, a private entity focused...

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Jeff Bornstein

Jeffrey “Jeff” S. Bornstein is a former Vice Chair and the former CFO of General Electric (July 2013 –...

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Kevin Walsh

Mr. Kevin P. Walsh served as Managing Director of Renewables and Head of Power and Renewable Energy at GE...

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Management Team

Joe Mastrangelo
Chief Executive Officer

Joe Mastrangelo is the CEO of Eos Energy Storage after serving as Board Advisor for the company since August...

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Mack Treece
Chief Strategic Alliances Officer

Prior to Eos, Mack led Viridity Energy in November 2012 as the Chief Executive Officer and Chief Financial Officer...

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Dr. Balakrishnan G. Iyer
Chief Commercial Officer

20+ years of leadership experience in Energy industry with companies like GE, Enel, Vestas, Schlumberger

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Sagar Kurada
Chief Financial Officer

Sagar C. Kurada joined Eos as Chief Financial Officer in July 2020. In this position, Sagar is responsible for...

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Daniel Friberg
SVP Engineering

As Vice President of System Design and Integration, Daniel is responsible for system engineering and integration of Eos Aurora...

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Nathan McCormick
SVP Operations

Nathan has 25 years of executive experience in the power generation equipment industry and U.S. Army. He served for...

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Partha Day, PhD
SVP Supply Chain

Senior Executive with 20+ years of experience in Supply Chain, Operations, Product Management, Project Management , Commercial Negotiation, Quality,...

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Tracey Czajak
VP Human Resources

With over twenty years experience in Human Resources andmore than fourteenyears focused in manufacturing and high tech companies, Tracey...

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Ronen Cohen
VP Finance and Strategy

Ronen joined us from Suez Environment where he served as CFO of their Specialty Chemicals business between 2017 and...

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Jean-François Audebert, PhD
VP Quality and EHS

JF Audebert joined Eos as Director of R&D Battery Engineering bringing a long successful experience in Battery / Energy...

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Francis Richey
Director – Research & Development

After graduating with a Bachelor of Science in Chemical Engineering from Penn State University and a Ph.D. degree from...

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Five key differentiators position Eos for success in this emerging and rapidly growing marketplace

"Energy Storage is a $620 Billion Investment Opportunity to 2040" – Bloomberg New Energy Finance Nov, 2018

Differentiated Product

Znyth® battery technology is low cost, safe, reliable, & long-lasting. Eos’ stationary energy storage maximizes customer return on investment in applications addressing the largest market need.

Industry-Leading LCOS

Eos is breaking the energy storage cost barrier and disrupting incumbent solutions used for peak generation and delivery capacity by providing the lowest levelized cost of storage of any technology in the 3-6 hour range.

World Class Manufacturing in the USA

Eos partnered with Holtec International to launch HI-POWER, a joint-venture manufacturing facility in Pittsburgh, PA with an annual capacity of 1 GWh.

Advanced Go-to-Market Strategy

Eos works with developers, utilities, and independent power producers around the world in use cases such as peak shaving, non-wires alternatives, and renewable generation shifting. Eos also collaborates with global value-add distributors to provide storage for behind-the-meter industrial optimization and indoor urban applications.

Experienced Management Team

Our veteran management team holds deep expertise in science, engineering and business and has a history of success in scaling energy businesses.