Volta SPAC Presentation Deck

Volta's Mature Unit Economics: The impact of network effects on our unit economics Cumulative Cash Flow per Station $600,000 volta $450,000 $300,000 $150,000 $0 -$150,000 0 Tortoise Acquisition Corp.Il 1 2 3 16x ROI on Mature 4 5 H Development (Years) 6 7 21 8 9 10 MATURE¹ L2 UNIT ECONOMICS 142% <2YRS Payback Period IRR MATURE¹ DCFC UNIT ECONOMICS 128% IRR <2YRS Payback Period Cumulative Cash Flow - Mature L2 Cumulative Cash Flow Mature DCFC 1: Mature unit economics are based on 2025 network assumptions. Source: Company projections.

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