Solid Power SPAC Presentation Deck

Superior Performance and Value Expected to Drive Mass Market Adoption 77 kWh pack: Today's lithium-ion vs. Solid Power ************* 10 $ System Volume System Mass Range Charge Cost¹ Safety² Today's Lithium-Ion 329 L 499 Kg 266 Miles 15 Min $10,934 EUCAR ≤ 4 I I I 1 I High-Content Silicon Anode Product % Solid Power Improvement 184 L 304 Kg 304 Miles <15 Min $6,545 EUCAR ≤ 2 I I I I 1 1 I T I I I I I I I I I I I I I I I I I I 44% 39% 14% Parity 40% Cost Savings ******* P $ System Volume System Mass Range Charge Cost¹ Products and Technology Safety² Today's hium-Ion 329 L 499 Kg 266 Miles 15 Min $10,934 EUCAR ≤ 4 1 1 1 1 1 I I 1 I 1 I 1 1 I 1 1 I I I I I I Lithium Metal Anode Product % Solid Power Improvement 184 L 269 Kg 308 Miles <20 Min $6,545 EUCAR ≤ 2 I I 1 I 44% 46% 16% Parity 40% Cost Savings Note: Analysis based on 77 kWh pack. Today's lithium-ion figures are representative of 77 kWh pack with cylindrical cells (i.e. Tesla Model 3 Pack). Solid Power cell performance metrics are initial commercialization design targets. 1. Reduction in cost at cell level only. 2. European Council for Automotive R&D safety ratings. See slide 52 for EUCAR definitions. Additional savings from safety are expected but have not yet been quantified. Solid Power DCRC 28

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