The maritime industry accounts for significant impacts on human life and environment. Numerous national and international efforts are calling for technical advancements. To support this development, the EU LIFE program is subsidizing a project between Siemens Energy and Sanlorenzo to generate electricity on a superyacht using an RMFC system instead of a diesel generator set. This study contributes to this project by evaluating the techno-economic viability and impact on the carbon emission, land use, mineral resource scarcity and water consumption using the LCA methodology. The key findings show that the RMFC system with grey methanol has similar costs to a diesel generator using MGO, while bio-methanol increases costs by a factor of 2.3. Furthermore, using e-methanol in an RMFC system can reduce GWP by over 40 % compared to a diesel generator.