Advent Technologies Holdings, Inc. is an advanced materials and technology development company operating in the fuel cell and hydrogen technology space. The Company develops, manufactures, and assembles complete fuel cell systems and the critical components that determine the performance of hydrogen fuel cells and other energy systems. Its core product offerings are full fuel cell systems and the Membrane Electrode Assembly (MEA) at the center of the fuel cell. The Company develops and manufactures high-temperature proton exchange membranes (HT-PEM or HT-PEMs) and fuel cell systems. Its systems are aimed to provide stationary power for the off-grid, backup, critical infrastructure, and portable markets. The Company also develops and manufactures MEAs, and designs fuel cell stacks and complete fuel cell systems for a range of customers in the stationary power, portable power, automotive, aviation, energy storage and sensor markets.