Eos Energy Investor Presentation Deck

Differentiated Technology Zinc Halide Battery Development History Simpler product with improved performance and lower total lifecycle costs MANIFOLD BLOCK ANOLYTE PUMP 11 ACCESS HOLES ANOLYTE RESERVOIR SIX BIPOLAR STACKS-80V CATHOLYTE RESERVOIR Figure 1-120-kWh Zinc-Bronine Battery X-201 Required separator OIL VALVE Carbon power cathode REVERSING VALVE FLOW METER Original Battery - 1983¹ Flow battery requiring pumps and tanks Bromide / Bromine redox CATHOLYTE PUMP Flow Battery System Conductive plastic current collectors Static Hybrid Battery Module Eos Z3 Battery - 2023 Static battery no pumps Eliminated separator Hybrid chloride / bromide redox Graphite felt cathode Conductive plastic current collectors (Titanium in Gen 2.3) ✓ Lower service costs ✓ ✓ Advantages Eliminated 3-4% pump aux load ✓ ✓ Increased performance Lower cost product 15% cell voltage improvement Lower cost raw materials ✓ Reduced degradation ✓ Wider operating temperature ranges ✓ Plastic processing improvements ✓ Improved ability to manufacture at scale (1) R. Bellows, H. Einstein, P. Grimes, E. Kantner, P. Malachesky, K. Newby, H. Tsien, A. Young Exxon Research and Engineering Company Advanced Energy Systems Laboratory Linden, NJ 07036 eos

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