Eos Energy Enterprises, Inc. expanded its partnership with TETRA Technologies, Inc. designating TETRA as the preferred strategic supplier of electrolyte products for Eos?s new, American made, Eos Z3? long duration energy storage cube. TETRA is expected to supply a minimum of 75% of the total electrolyte product demand going forward.

The expected demand growth for Long Duration Energy Storage requires increased volume at scale, and with TETRA?s investment in expanded bromine production, Eos is better positioned to achieve the scale necessary over the next several years, while reducing cost per battery and improving overall quality and performance. Key to the operational success of the Eos Z3? cube is high purity zinc-bromide, which is part of Eos?

patented electrolyte system. TETRA?s U.S. based patented manufacturing process produces some of the highest purity levels of zinc-bromide (PureFlow®) globally. The electrolyte solution is one of the largest cost components of the Eos Z3 cube and this agreement supports progress on the Company?s path to profitability.

The two companies have been working together since 2021 to improve the quality of the electrolyte solution. This four-year agreement is an expansion of an existing partnership between the two companies that began in 2021 and includes provisions that allow for extending the agreement beyond the initial four-year term. Eos and TETRA officials indicate that the agreement includes favorable pricing and cost savings allocation methodologies that motivate both parties to actively pursue further cost reductions.