Proterra SPAC Presentation Deck

PROTERRA OVERVIEW Modular, Scalable Manufacturing Enables Expansion at Customer Sites Advanced R&D, 81 Patents, and Manufacturing Capabilities In-Place and At-Scale Demonstrated Ability to Efficiently Scale Capacity BATTERY MANUFACTURING Los Angeles Battery Factory Is a Template for Future Sites Rapid Deployment: Built in under 12 months Cost Effective: Sub-$20MM invested, 50K sq. ft. per GWh Automated: ~50% labor cost reduction Replicable: Template for co-location at customer sites Since 2017 April 8, 2021 Established Footprint in Technology and Manufacturing Hubs Year Opened 86% Reduction in Battery Unit Cost 1. Represents capacity of our newest-generation 2170 cells 2. Represents capacity of our prior-generation 18650 cells 3. Per Bus Los Angeles, CA Burlingame, CA Greenville, SC Product Battery Bus Battery Bus 2020 2017 2017 2011 PROTERRA Max. Annual Capacity 675 MWh ¹ 280 vehicles 345 MWh ² 400 Vehicles 55% Reduction in Labor and Overhead 3 19

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