Proterra SPAC Presentation Deck

PROTERRA TECHNOLOGY Battery System: State-of-the-Art Technology Designed to Excel in Medium and Heavy-Duty Vehicle Applications Proterra Battery Core Attributes Intelligent Battery Management System Gravimetric Energy Density Volumetric Energy Density Ruggedized, Commercial Grade Enclosure Functional Safety Certified Resiliency to Cell Defects and Failures Multi-Layered Passive and Active Safety Systems January 2021 Real-World Customer Benefit L Hundreds of sensors delivering continuous monitoring and diagnostics Extended range, higher cargo / occupant capacity, and increased vehicle efficiency Minimizes battery space requirements with packaging designed for safety Ballistic-grade materials designed to withstand the toughest conditions over vehicle lifecycle Redundant sensing and processing designed to ensure safe and reliable operation Long life span, intrinsically resistant to cell propagation State-of-the-art testing, certification & compliance programs PROTERRA PROTERRA POWERED 29

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