Proterra SPAC Presentation Deck

INTRODUCTION PROTERRA Disclaimer This presentation (together with oral statements made in connection herewith, the "Presentation") is for informational purposes only to assist interested parties in making their own evaluation with respect to the proposed business combination (the "Business Combination") between ArcLight Clean Transition Corp. ("ArcLight") and Proterra Inc. ("Proterra" or the "Company").. The information contained herein does not purport to be all-inclusive and none of ArcLight, the Company nor any of their respective subsidiaries, stockholders, shareholders, affiliates, representatives, control persons, partners, directors, officers, employees, advisers or agents make any representation or warranty, express or implied, as to the accuracy, completeness or reliability of the information contained in this Presentation. You should consult your own counsel and tax and financial advisors as to legal and related matters concerning the matters described herein, and, by accepting this Presentation, you confirm that you are not relying upon the information contained herein for any purpose or to make any decision. . To the fullest extent permitted by law, in no circumstances will ArcLight, the Company, or any of their respective subsidiaries, stockholders, shareholders, affiliates, representatives, control persons, partners, directors, officers, employees, advisers or agents be responsible or liable for any direct, indirect or consequential loss or loss of profit arising from the use of this Presentation, its contents, its omissions, reliance on the information contained within it, or on opinions communicated in relation thereto or otherwise arising in connection therewith. In addition, this Presentation does not purport to be all-inclusive or to contain all of the information that may be required to make a full analysis of the Company or the Business Combination. Use of Data Certain information contained in this Presentation relates to or is based on studies, publications, surveys and the Company's own internal estimates and research. In addition, all of the market data included in this Presentation involves a number of assumptions and limitations, and there can be no guarantee as to the accuracy or reliability of such assumptions; neither the Company, ArcLight nor their representatives or affiliates assumes any responsibility for updating this Presentation based on facts learned following its use. Finally, while the Company believes its internal research is reliable, such research has not been verified by any independent source and none of ArcLight or the Company, nor any of their respective affiliates nor any of its or their control persons, officers, directors, employees or representatives make any representation or warranty with respect to the accuracy of such information. Forward-Looking Statements Certain statements in this Presentation may be considered forward-looking statements. Forward-looking statements generally relate to future events or ArcLight's or the Company's future financial or other performance metrics. For example (and without limitation), statements concerning the following include forward-looking statements: summary financial forecast; projections of operating performance, revenues, gross margin, expenses, capital expenditures, total cost of goods sold, gross (loss) profit; estimates and projections regarding future manufacturing capacity: projections and estimates of market opportunity and market share; future profitability; the Company's business plan; market acceptance of the Company's offerings, the Company's ability to further attract, retain, and expand its customer base; the Company's ability to timely and effectively scale its production and manufacturing processes; the Company's ability to develop new products and services and bring them to market in a timely manner; the Company's expectations concerning relationships with strategic partners, suppliers, and other third parties; the Company's ability to maintain, protect, and enhance its intellectual property; future acquisitions, ventures or investments in companies or products, services, or technologies; the Company's ability to attract and retain qualified employees; continuation of favorable regulations and government incentives affecting the markets in which the Company operates; the proceeds of the Business Combination and the Company's expected cash runway; and the potential effects of the Business Combination on Arclight and the Company. In some cases, you can identify forward-looking statements by terminology such as "believe," "may," "will," "potentially," "estimate," "continue," "anticipate," "intend," "could," "would," "project," "target," "plan," "expect," or the negatives of these terms or variations of them or similar terminology. Such forward-looking statements are subject to risks, uncertainties, and other factors which could cause actual results to differ materially from those expressed or implied by such forward looking statements. These forward-looking statements are based upon estimates and assumptions that, while considered reasonable by ArcLight and its management, and the Company and its management, as the case may be, are inherently uncertain and subject to material change. New risks and uncertainties may emerge from time to time, and it is not possible to predict all risks and uncertainties. Factors that may cause actual results to differ materially from current expectations include, but are not limited to, various factors beyond management's control, including general economic conditions and other risks, uncertainties and factors set forth in the section entitled "Risk Factors" and "Cautionary Note Regarding Forward-Looking Statements" in ArcLight's final prospectus relating to its initial public offering, dated September 22, 2020, and other filings with the Securities and Exchange Commission (SEC), as well as factors associated with companies, such as the Company, that are engaged in commercial electric vehicle technology, including anticipated trends, growth rates, and challenges in those businesses and in the markets in which they operate; macroeconomic conditions related to the global COVID-19 pandemic; trends with respect to government funding for public transit; the willingness of corporate and other public transportation providers to adopt and fund the purchase of electric vehicles for mass transit; expected adoption of electrification technologies for commercial vehicles; the size and growth of the market for alternative energy vehicles in general and medium- and heavy-duty electric vehicles, including transit buses and other commercial vehicles, in particular; the effects of increased competition; the ability to stay in compliance with laws and regulations that currently apply or become applicable to the commercial electric vehicle technology business and government contractors; the failure to realize the anticipated benefits of the Business Combination; the amount of redemption requests made by ArcLight's public stockholders; the ability of the issuer that results from the Business Combination to issue equity or equity-linked securities or obtain debt financing in connection with the Business Combination or in the future. Nothing in this Presentation should be regarded as a representation by any person that the forward-looking statements set forth herein will be achieved or that any of the contemplated results of such forward-looking statements will be achieved. You should not place undue reliance on forward-looking statements in this Presentation, which speak only as of the date they are made and are qualified in their entirety by reference to the cautionary statements herein. Neither ArcLight nor the Company undertakes any duty to update these forward-looking statements. Use of Projections This Presentation contains projected financial information with respect to Proterra. Such projected financial information constitutes forward-looking information, and is for illustrative purposes only and should not be relied upon as necessarily being indicative of future results. The assumptions and estimates underlying such financial forecast information are inherently uncertain and are subject to a wide variety of significant business, economic, competitive and other risks and uncertainties that could cause actual results to differ materially from those contained in the prospective financial information. See "Forward-Looking Statements" paragraph above. Actual results may differ materially from the results contemplated by the financial forecast information contained in this Presentation, and the inclusion of such information in this Presentation should not be regarded as a representation by any person that the results reflected in such forecasts will be achieved. Neither ArcLight's nor the Company's independent auditors have audited, reviewed, compiled or performed any procedures with respect to the projections for the purpose of their inclusion in this Presentation, and accordingly, neither of them expressed an opinion or provided any other form of assurance with respect thereto for the purpose of this Presentation. In preparing and making certain forward-looking statements contained in this presentation, Proterra and ArcLight made a number of economic, market and operational assumptions. Notably, statements regarding the Company's 2025 vision, and summary financial forecast are, without limitation, subject to material assumptions regarding the Company's ability to economically manufacture and distribute its products at scale and meet its customers' business needs, the Company's ability to successfully execute its growth strategy, the Company's ability to maintain required strategic supply arrangements, rates of adoption of battery electric vehicles by customers in the markets in which the Company operates, and continuation of favorable regulations and government incentives affecting the markets in which the Company operates. The Company cautions that its assumptions may not materialize and that current economic conditions render such assumptions, although believed reasonable at the time they were made, subject to greater uncertainty. April 8, 2021 2