**Green Hydrogen Revolutionizes Offshore Operations: The Coastal Liberty Supply Vessel**
In a groundbreaking move, the Coastal Liberty offshore supply vessel has embarked on a new era of sustainability in the Wadden Sea offshore the Netherlands. Equipped with a cutting-edge green hydrogen energy system, this vessel is at the forefront of the maritime energy transition.
The refitted vessel attained class certification from DNV late in February 2024, marking a significant milestone in its journey towards zero-emission operations. eCap Marine, under the direction of Offshore Service Gesellschaft, engineered the innovative containerized solution comprising two 200-kW Ballard FCwave fuel cells, a maritime battery system from Lehmann Marine, a fire extinguishing system, tank modules, a custom power management system, and related cooling and safety equipment.
This setup is uniquely designed for a seagoing ship and aims to reduce vibrations on board while providing more direct propulsion, enabling immediate response to the propeller shafts. The green hydrogen for the installed fuel cells is locally produced using offshore wind power on an electrolyzer hydrogen plant located mere kilometers from the vessel’s berth. The system is designed for expansion if demand grows, reflecting the adaptable and scalable nature of this technology.
According to eCap Marine managing director Lars Ravens, the system is a first of its kind and demonstrates the potential for larger commercial ships and inland vessels alike to transition to green hydrogen power. The high-pressure tank systems were designed in compliance with transport regulations, ensuring seamless operation between the vessel and the electrolyzer via truck transport.
The **Coastal Liberty**, now a flagship for the maritime energy transition in Europe, operates from Cuxhaven. At 42.75 meters in length and 328 gross tonnes, it supplies energy projects in the shallow waters of the Wadden Sea and the North Sea. With this green hydrogen power setup, the vessel is not only reducing its carbon footprint but also enhancing its operational efficiency.
Offshore Service Gesellschaft’s chief executive, Jochen Kaufholt, highlights the significant reductions in emissions achieved by **Coastal Liberty** since transitioning to pressurized hydrogen fuel. The direct propulsion system powered by green hydrogen has proven to be safe and reliable, backed by rigorous toolless design and standard connections for cranes and lorries. This reliability ensures that hydrogen tank switching and refueling remain uncomplicated operations.
The eCap Marine containerized hydrogen-electric energy system on board **Coastal Liberty**