Advent Investor Presentation Deck

01 RANGE / PAYLOAD AVIATION: COMMERCIAL FLIGHTS, DRONES, EVTOLS Compared with Batteries, e-Fuels or even H2, provide an attractive solution ● ● PAYLOAD increases 2x+ RANGE increases from minutes to hours Based on: Next-generation HT-PEM MEAS Proprietary ultra-lightweight non-metal plates Advent Fuel Cell 4 Refill 1-2 times a day 3 ADVENT 02 EFFICIENCY 10 Mins High temperature Is key for flight efficiency 03 UTILIZATION Projected trip from San Francisco to Palo Alto* Refills in minutes vs. hours eVTOL Case Trips Passengers Recharge Battery 1 2 04 MULTI-FUEL H2 or dimethyl ether (DME) is an attractive fuel source ● ● ● ● ARPA-E: minimum of 2,000Wh/kg energy density is required for flight Jet fuel: 12,00oWh/kg. H2: 40,000Wh/kg, Methanol: 5.472Wh/kg, DME: 7,889Wh/kg Battery: 240Wh/kg 3 Hours Wait to recharge before second trip MARKETS Surveillance Drones Delivery Drones eVTOLS Airplanes *Expected performance of a typical trip from San Francisco to Palo Alto in California of an eVTOL using the Advent Fuel Cell vs. using just a battery. Any Fuel. Anywhere. 20

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