Proterra SPAC Presentation Deck

PROTERRA OVERVIEW Innovation DNA Meets Manufacturing Expertise Advanced R&D, 81 Patents, and Manufacturing Capabilities In-Place and At-Scale Established Footprint in Technology and Manufacturing Hubs Product Year Opened Los Angeles, CA Burlingame, CA Greenville, SC Since 2017 January 2021 Battery Bus Battery Bus 2020 2017 2017 2011 Max. Annual Capacity 1. Unit costs 675 MWh 280 Vehicles 345 MWh 400 Vehicles 86% Reduction in Battery Unit Cost Demonstrated Ability to Efficiently Scale Capacity BATTERY MANUFACTURING Los Angeles Battery Factory Case Study PROTERRA 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 55% Reduction in Labor and Overhead ¹ 12

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