In a landmark development for maritime sustainability, Acta Marine's offshore support vessel Coastal Liberty has implemented a cutting-edge hydrogen-electric energy system in the German Wadden Sea. The operator, based in the Netherlands, partnered with eCap Marine to install a bespoke system that allows the vessel to operate without emissions, utilizing hydrogen and batteries for propulsion. Following rigorous testing and development, the newly retrofitted vessel received class certification from DNV for its innovative hydrogen technology. The system, developed over two years, integrates advanced components such as Ballard FCwave fuel cells, a maritime battery system, and a sophisticated power management setup. This containerized solution not only enhances the environmental performance of the vessel but also provides scalability for application in larger commercial ships and inland vessels. Lars Ravens, managing director of eCap Marine, emphasized the uniqueness of this installation and its potential for megawatt-sized implementations. One of the key sustainability aspects of the project is the local production of green hydrogen, sourced from an electrolyzer plant powered by offshore wind energy near the vessel's berth. The production infrastructure is designed to meet increasing demands, ensuring a reliable and sustainable fuel source for the vessel. To guarantee safety during hydrogen transport and operation, eCap Marine devised high-pressure tank systems that can be easily swapped and connected, prioritizing crew safety and operational efficiency. For the crew of Coastal Liberty, the transition to the new hydrogen-electric system has brought tangible benefits, including reduced vibrations and enhanced propulsion response. This technological advancement not only aligns with the industry's push towards greener practices but also sets a precedent for the adoption of hydrogen technology in maritime operations, marking a significant step towards cleaner and more sustainable shipping.