Frontier Power USA (together, with its affiliates, "FPUSA"), a long-duration energy storage development and investment company, and Stella Energy Solutions ("Stella"), a U.S. utility-scale clean energy platform, today announced that FPUSA has exercised its exclusive Selection Right with respect to four battery energy storage projects being developed by Stella: the Blanquilla BESS Project, the Aransas Pass Project, the Nash Project and the Wallis Project. Collectively, the projects represent approximately 230 MW / 920 MWh of battery energy storage capacity, have been selected for conversion onto the FPUSA platform under the parties' strategic framework, and are expected to utilize Eos Energy Enterprises, Inc. (NASDAQ: EOSE) ("Eos") Z3 long-duration batteries. Closing remains contingent upon the successful closing of Eos's recently announced rights offering.