Volta SPAC Presentation Deck

Transaction Summary ▸ Founded in 2010, Volta has been building one of the most used electric vehicle (EV) charging stations in the United States¹ SUMMARY OF TRANSACTION ▸ Volta's award-winning charging stations benefit brands, consumers and real-estate locations by providing valuable advertising space to businesses and EV charging to drivers ▸ Tortoise Acquisition Corp. II (Tortoise II) (NYSE: SNPR) is a publicly listed special purpose acquisition company (SPAC) with ~$345M of cash held in trust ▸ Tortoise II anticipates entering into a business combination agreement with Volta in Q1 2021 Volta shareholders are rolling 100% of their equity Transaction proceeds are being retained in the business ▸ Pro Forma for the transaction (assuming no redemptions) volta ▸ Pro Forma enterprise value of $1.4Bn volta Volta will have an additional ~$600M of proceeds net of transaction fees to fully fund business model through cash flow positive Near-term EBITDA relative to public charging peers Represents attractive entry point relative to recently announced public SPAC transactions SCOTT MERCER Founder + CEO + Chair Tortoise Acquisition Corp.ll CHRIS WENDEL Co-Founder President + Director DREW LIPSHER CSO Issuer 6 Ticker/Listing Securities Offering Size Use of Proceeds LEADERSHIP SUMMARY OF PIPE OFFERING Expected Closing Date VINCE CUBBAGE CEO + President + Chair Tortoise Acquisition Corp. II (name to be changed to Volta Inc. at closing) NYSE: SNPR (to become NYSE: VLTA at closing) Unregistered Class A Common Stock (customary registration rights) $300M Develop the existing backlog of Volta charging station location demand and accelerate further growth within the company ~Q2 2021 STEPHEN PANG CFO + Director T Tortoise Acquisition Corp.Il 1: Company data and publicly available information.

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