Long Duration Energy Storage Systems for a Cleaner Future

Robust Intellectual Property Portfolio ESS Critical Technology Proton Pump Electrolyte J- Power Module Current Collector = Patent protected 1 As of March 25, 2021. Pressure Plate DO (-) Electrode Conductive Separator (+) Electrode ESS IP Portfolio 125+ Patents Granted and in Pipeline Pending Applications RUESSINC Porous Separator Undisclosed Number of Trade Secrets and Identified Patents World-leading Iron Flow expertise, and roadmap to additional breakthroughs and advantages ~57% Employees Have an Engineering Background¹ CONFIDENTIAL | 22

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