Eos. Positively ingenious.

Since our founding in 2008, Eos has been on a mission to accelerate the shift to clean energy with positively ingenious solutions that transform how the world stores power. Our breakthrough Znyth® aqueous zinc battery was designed to overcome the limitations of conventional lithium-ion technology. Safe, scalable, efficient, sustainable—and manufactured in the U.S.—it’s the core of our innovative systems that today provide utility, industrial, and commercial customers with a proven, reliable energy storage alternative.

But that’s just the start of how we plan to make a positive impact. Forging our ambition, originality, and resourcefulness into something that’s ever more ingenious, that resets how great is defined and forever alters the way things work, is what we strive to do each day. It’s how we imagine, make, and hone clean energy storage solutions that defy convention to not only get the job done, but to do it better.

At Eos, in our Edison, NJ headquarters and our Pittsburgh, PA manufacturing plant, we’re creating purpose-built systems that work without complication—economical to produce, quick to install, safe to run, and easy to maintain—in the heat of an arid desert or the center of a bustling city. We’re minimizing the impact of every input and output in the processes we employ to consistently drive the entire value chain—supply, manufacturing, and operation—to zero carbon and zero waste, for ever greener generation tomorrow. And we’re staying flat and fast and engaging all our talents and experience in every effort to remove the barriers to delivery and access. Because the world simply can’t wait. It’s time to charge forward.

To the people of Eos, it’s just that simple, that smart. With ingenuity, we can build a more positive future powered by abundant and affordable clean energy.


Download corporate overview



Company timeline

Listing on Nasdaq

A positively ingenious moment for energy storage: the IPO of Eos Energy Enterprises (NASDAQ: EOSE)

November 2020

Gen 2.3 production

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

June 2020

Opening of Hi-Power production facility

Eos builds 250 MWh production facility in Pittsburgh, PA in a joint venture with Holtec International

Jan 2020

Gen 2.0 global deployment

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

May 2019

West Caldwell Microgrid 2.0

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

Jan 2019

Aurora Gen 2.0 launched

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

Sept 2018

First megawatt-hour project

250 kW / 1MWh Eos Aurora Gen 1.0 system

Oct 2017

Major utilities install

Major utilities begin to install Eos grid-scale energy storage

July 2017

Gen 1.0 product launch

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

Jan 2017

Prototype testing with ENGIE

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


Prototype testing with DNV GL

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


Eos founded

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



Eos has assembled an executive team focused on accelerating the commercialization of the next-gen Eos storage 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.

Management Team

Joe Mastrangelo
Chief Executive Officer

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

Read full bio
Randall Gonzales
Chief Financial Officer

Randall (“Randy”) B. Gonzales was appointed Chief Financial Officer of Eos in January 2022 after a more than 20-year...

Read full bio
Melissa Berube
General Counsel, Chief Compliance Officer and Corporate Secretary

Melissa joined Eos in June 2021. Melissa brings diverse experience managing legal risk, corporate governance, compliance and legal process...

Read full bio
Roma Desai
Chief People Officer

Roma joined Eos as Chief People Officer in May 2022. She is a passionate Global HR Senior Executive with...

Read full bio
Steven Warthman
Chief Supply Chain Officer

Steve was appointed Eos’s Chief Supply Chain Officer in June 2022 and is responsible for strategic diversification of Eos’...

Read full bio
William K. Mao
Chief Commercial Officer

30+ years of electrical industry experience with Hitachi Energy and Hitachi ABB Power Grids.

Read full bio
David Leligdon
Senior Vice President of Projects

As Senior Vice President of Projects, Dave is responsible for execution of projects from project initiation through the entire...

Read full bio
Francis Richey
Senior Vice President of Research & Development

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

Read full bio
Pranesh Rao
Senior Vice President of Storage Systems Engineering

Pranesh started at Eos as Vice President, Engineering Control Systems on July 11, 2022. Since then, he has been...

Read full bio

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.