Advent Investor Presentation Deck

● OFF-GRID POWER: TELECOM TOWER POWER METHANOL FUEL CELL SYSTEMS (5-15kW) Acquisition of SerEnergy & fischer eco solutions fuel cell businesses closed on September 1, 2021 01 PROVEN SerEnergy has deployed hundreds of systems deployed to telecom tower operators around the world Remote monitoring and self- maintaining systems Operate at extreme conditions Business Case: Smart Communications deploys SerEnergy fuel cells across its Philippine telco network Ser energy clean power ADVENT Smart 02 DEPLOYABLE Power generation in off/bad-grid sites for critical infrastructure, telecom, construction sites • Self-contained cabinet systems with 1-3 5kW fuel cells Total number of off-grid and bad-grid towers: 1.021.100 701.000 320.100 2014 +16% 1.180.600 791.000 389.600 Source: GSMA, "Green Power for Mobile", Dec 2014. Bad-grid: Less than 18 h of reliable grid access per day. 2020 off-grid towers bad-grid towers 03 CLEAN ENERGY Fuel cells do not produce particulate pollutants or unburned hydrocarbons. They emit less carbon dioxide than other, less efficient technologies. With the use of e-Fuels, this creates a path to effectively zero-emissions energy. ● 92 additional highly- skilled R&D, manufacturing and sales professionals HT-PEM focused with proven production capabilities in Denmark & Germany Acceleration with business in Asia and Northern Europe markets Any Fuel. Anywhere. 12

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