The Energy Observer is a self-sufficient vessel that integrates solar panels, wind turbines, and hydrogen fuel cells, demonstrating how renewable systems can work together in marine environments https://www.quora.com/What-do-you-think-of-the-Energy-Observer-the-solar-panel-covered-catamaran-that-produces-hydrogen-fuel-via-seawater-electrolysis/answer/Coherent-Market-Insights-1?ch=10&oid=1477743868977468&share=01d597da&srid=uTm6RG&target_type=answer