Advent Technologies Holdings, Inc. (NASDAQ: ADN) ("Advent" or the "Company"), an innovation-driven leader in the fuel cell and hydrogen technology sectors, is pleased to announce the signing of a three-year agreement with the German State of Brandenburg for the supply of methanol-powered fuel cell systems, which will be installed in select critical communication sites in the region.

Advent's methanol-powered fuel cell systems will be used as a back-up power source for Brandenburg's BOS digital radio network, replacing the diesel-driven emergency power systems at several sites over the next three years. Germany's old public safety and security infrastructure relied on an outdated analogue radio system for communication. BOS is a digital, encrypted, and secure means of communication. The new BOS network allows first responders and other public safety officials to communicate easily and securely. The BOS network now covers 99.2% of German territory.

Advent's solution was selected as part of a tender launched by the German State of Brandenburg, which requested that fuel cell and hydrogen technology companies submit proposals for sustainable and reliable emergency power supply solutions. Prior to Advent's selection, the performance of the Company's methanol-powered fuel cells was tested at a site of the BOS digital radio network in Brandenburg, providing further proof of concept for the use of HT-PEM fuel cells as an efficient back-up power source for critical infrastructure applications. Advent's methanol-powered fuel cells deliver reliable power in an environmentally friendly way – reducing CO2 emissions and operating silently – while having a low impact on the surroundings. Methanol, as a carrier of hydrogen, allows simpler storage than pure hydrogen and enhances the safety of operations.

"We are thrilled that the German State of Brandenburg endorses Advent’s products for Brandenburg’s critical communication needs and are confident that Advent’s methanol-powered fuel cell systems will ensure the seamless operation of the entire BOS digital radio network in the region. This new partnership marks a major step towards the wider adoption of HT-PEM fuel cells as a back-up power source in critical infrastructure applications across Europe. We look forward to joining similar projects in the near future,” stated Advent Technologies GmbH Senior Vice President, Daniel Hennig.

"The Advent team is proud and excited to start this new collaboration with the German State of Brandenburg. Now, more than ever, the world needs zero-emission back-up power solutions to ensure a clean and uninterrupted energy supply. Today's agreement is another testament on how Advent’s methanol-powered fuel cells can play a major role in supporting critical infrastructure power requirements around the globe. We look forward to a long and successful collaboration with our new partner," added Dr. Vasilis Gregoriou, Advent Technologies Chief Executive Officer and Executive Chairman of the Board.

About Advent Technologies Holdings, Inc.

Advent Technologies Holdings, Inc. is a U.S. corporation that develops, manufactures, and assembles complete fuel cell systems as well as supplying customers with critical components for fuel cells in the renewable energy sector. Advent is headquartered in Boston, Massachusetts, with offices in California, Greece, Denmark, Germany, and the Philippines. With more than 150 patents issued, pending, and/or licensed for fuel cell technology, Advent holds the IP for next-generation HT-PEM that enables various fuels to function at high temperatures and under extreme conditions – offering a flexible fuel option for the automotive, aviation, defense, oil and gas, marine, and power generation sectors. For more information, visit www.advent.energy.

Cautionary Note Regarding Forward-Looking Statements

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