Eos gets ‘supply chain continuity’ for zinc battery storage from deal with chemicals company TETRA

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Eos battery system installed a few years ago at a testing facility for US utility Duke Energy. Image: Duke Energy.

‘Zinc hybrid cathode’ battery storage company Eos Energy Enterprises has signed a long-term supply and collaboration agreement with industrial chemicals group TETRA Technologies.

The agreement will support Eos’ plans to scale up manufacturing of its ‘Znyth’ brand aqueous zinc battery technology, with TETRA to supply high purity zinc-bromide, a key component of the battery company’s electrolyte system. 

Eos, which produces three-hour duration battery systems stackable to durations of up to 12 hours, and suitable for mid-size commercial applications up to large-scale utility projects, is targeting an expansion of its manufacturing capacity to 800MWh during next year. 

In addition to zinc-bromide delivered through TETRA’s patented high purity production process, a strategic term sheet signed by the pair covers a collaboration on improvements to battery performance, costs and system lifetimes, including creating end-of-life solutions based on the chemical company’s reclamation and recycling know-how. 

“We are pleased to partner with a US-based supplier like TETRA that will enable our supply chain continuity and provide access to untapped reserves of bromine as our company grows,” Eos CEO Joe Mastrangelo said.

“Further, they allow us to continue to produce a product that is recyclable at the end of life and accelerates the shift to clean energy.”

TETRA’s bromine and manufacturing operations are in the US state of Arkansas, which could neatly align with US government objectives to support domestic supply chains for industry, particularly in the clean energy sector. TETRA is also seeking to expand its operations in the state further in the coming years.  

“This relationship aligns well with our strategy to utilize our aqueous chemistry core competency to enable the supply chain for low carbon energy solutions,” TETRA CEO Brady Murphy said, adding that Eos’ Znyth aqueous zinc battery is “cost-effective, safe, long-duration energy storage technology”.

Eos has claimed a pipeline of opportunities worth US$3.7 billion ahead of itself, representing 22GWh of potential orders, as well as a backlog of more than US$150 million, representing about 613MWh of systems technology, as of the end of the third quarter of this year.

This includes US$137.4 million of customer orders booked during 2021. However, as reported by Energy-Storage.news in November, only US$3.4 million of product had been shipped this year by that time and Eos has guided revenues of just US$5 million to be realised for the full-year 2021. 

That was a significant downgrading from a previously offered 2021 revenue target of US$50 million, with company CEO Mastrangelo attributing that largely to delays caused by COVID-19. Eos listed on NASDAQ in November 2020 and netted a US$100 million investment commitment from Koch Strategic Platforms in July this year in addition to a US$25 million equipment financing agreement for its manufacturing, with Trinity Capital, announced in October.     

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