In line with the International Maritime Organization's (IMO) ambitious target of achieving net zero greenhouse gas emissions by 2050, this paper proposes a novel Mobile Offshore Charging Ship (MOCS) to address the limited operational range of electric vessels. The paper details the design and fabrication of a prototype MOCS, incorporating solar power generation, logic controllers, and 3D-printed components. While testing confirmed the prototype's functionality and potential for practical deployment, limitations in scalability were identified due to current battery technology and wireless power transfer constraints. The discussion emphasizes the need for further advancements in energy storage, autonomous operation, and dynamic environmental modelling to enable larger-scale MOCS implementation. This research establishes a proof-of-concept for MOCSs and highlights their potential to significantly contribute to sustainable maritime decarbonization efforts.