Proterra Investor Presentation Deck

Proterra is Well Positioned to Capitalize on the First Commercial Vehicle Segments to Electrify First Came Buses then Short-Haul Vehicles and Next is Long-Haul Trucks 16% BATTERY ELECTRIC PER MIND 41% Laddad Mode 05 Transit Buses¹ 50 © 2023 Proterra. All Rights Reserved. Source: 1. 2. 3. 4. <10% 5. 27% School Buses² <1% VOLTA ZERO 14% VOLTA W220-240 Medium-Duty Trucks3 <1% Electric commercial vehicle forecasts imply potential battery demand in U.S. and Europe of >35 GWh in 20275 2022 Battery electric as % of new 2027 vehicle sales 5% PROTERRA Heavy-Duty Trucks4 "Frost & Sullivan's North American Electric Transit and Coach Forecast 2023-2030" from April 2023 The International Council on Clean Transportation and School Bus Fleet's "Analyzing the Impact of the Inflation Reduction Act on Electric Vehicle Uptake in the United States" from January 2023 North America and Europe. Morgan Stanley's March 23, 2023 report, "Zero Emissions Truck Penetration Curve Research" - 2023 Edition North America and Europe. 2022 data from IHS Markit and ACEA; 2027 forecast from Morgan Stanley's March 23, 2023 report, "Zero Emissions Truck Penetration Curve Research" - 2023 Edition Management estimate based on Morgan Stanley's penetration forecasts from March 13, 2023 report, "Zero-Emissions Truck Penetration Curve Refresh -2023 Edition" and assume average battery size/vehicle of 225 kWh for medium-duty, 300 kWh for buses and 750 kWh for heavy-duty 6

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