Advent Investor Presentation Deck

Experienced Leadership Team Vasilis Gregoriou* Chairman & CEO 30+ years of operational and strategy experience in the U.S. and Europe • World-renowned renewable energy expert • Extensive experience in product development and company management . MBA, Northeastern University Ph.D. in Physical Chemistry, Duke ADVENT • 35+ years of technology commercialization • 25+ years in fuel cells • Volume manufacturing expert ● Emory De Castro* CTO ● ● DOE Manufacturing Award BASF Fuel Cell Inc. PEMEAS Inc., and De Nora N.A. E-TEK B.S. in Chemistry, Duke University Ph.D. in Chemistry, University of Cincinnati ● ● Proven track record of technological development and commercialization T Kevin Brackman CFO 25 years of finance experience Myers Industries Ingersoll-Rand Chiquita Brands International American Institute of Certified Public Accountants B.S. Accounting & Finance, Miami University Chris Kaskavelis CMO • 20+ years as a C-Suite Officer in Tech/Marketing (founded start- up to AIM & Nasdaq IPOs) • B.S. in Electrical Engineering and B.A. in Business Economics, Brown University • Ph.D. in Supply Chain Management and M.Sc. in Manufacturing Engineering, Boston University 'Indicates member of Board of Directors following the Business Combination. Additional Board of Director members include Katherine Fleming. Anggelos Skutaris, Katrina Fritz and Lawrence Clark. Jim Coffey General Counsel & COO • 30+ years experience in corporate and securities law, M&A, VC, corporate finance and IP law . Long track record working with companies the clean energy and technology sectors, with specific experience in the fuel cell industry B.A., Providence College • J.D., New England School of Law • LL.M. in Corporate Law, New York University Any Fuel. Anywhere. 50

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