Our project’s main innovation lies in integrating lithium batteries and solar energy as the core onboard power sources, in line with sustainable engineering principles. Through fluid dynamics analysis and structural topology optimisation, we achieved an ultra-lightweight hull while maintaining sufficient structural rigidity, improving overall performance and stability. An efficient onboard power management system was developed to coordinate energy generation from solar photovoltaic panels and energy storage in lithium batteries, ensuring optimal power distribution to the electric propulsion system. In addition, a cost-effective, high-performance shock absorption mechanism enhances reliability and stability under varying sea conditions. Our goal is to advance sustainable marine propulsion technologies, demonstrating the practical potential of hybrid propulsion systems and setting a benchmark for energy-efficient, high-performance electric vessels.