Proterra SPAC Presentation Deck

PROTERRA OVERVIEW Proven Track Record and Solid Foundation for Growth 1 2 Ν 3 4 5 6 April 8, 2021 Integrated Technology Ecosystem Proven, Real-World Validation Significant Addressable Market Today Strategic Partnerships Premier Strategic and Financial Investors Real Revenue, Rapid Growth, Clear Visibility PROTERRA POWERED ~18M Real-World Service Miles ~$260Bn+ Global Commercial Electric Vehicle Market 2 DAIMLER Constellation. An Exelon Company EDISON INTERNATIONAL $197MM '20 Revenue PROTERRA 1. Over 600 vehicles on the road and over 450 vehicles in backlog as of December 2020 2. Includes commercial vehicles and charging; refer to Index on page 66 for additional information 3. From 2010 to 2019; refer to Index on page 66 for additional information 4. Versus diesel; refer to Index on page 66 for additional information TRANSIT 1,000+ 300 MWh Vehicles Sold 1 ~85% Decline in Electric Battery Costs 3 KOMATSU DAIMLER 6 BMW i Ventures 68% '20-'25E Revenue CAGR Batteries Produced ~40% Lower Vehicle Operating Costs 4 FRANKLIN TEMPLETON LG Chem INVESTMENTS COWEN $750MM+ Orders and Backlog 6 PROTERRA PROTERRA ENERGY™ FLEET SOLUTIONS 46 MW Charging Installed 100% Zero Emissions by 2050 15 State Targets 5 POWER ELECTRONICS generation KPCB KLEINER PERKINS CAUFIELD BYERS 25% ¹25E Gross Margin 5. Medium-duty and heavy-duty truck market; refer to Index on page 66 for additional information 6. As of December 2020; represents Proterra Transit backlog and Proterra Powered orders signed and under advanced negotiation 11

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