EPFL’s Solar‑Hydrogen Foiler Hits 35 Knots, Aims for Monaco 2026

Context\ Waterborne mobility is shifting from leisure to a low‑emission transport option. EPFL’s Swiss Solar Boat (SSB) project, driven by 75 students, is building that future with a hybrid of solar power and hydrogen fuel. The team’s earlier vessel, Dahu, proved hydrogen propulsion viable by crossing Lake Geneva in 2024.

Key Facts\ The REF is a three‑person foiling craft—foils are underwater wings that lift the hull, cutting drag. It combines a hydrogen fuel cell with solar panels, delivering a top speed of 35 knots (65 km/h) and a range between 160 km and 250 km per charge. Construction began in summer 2024; electronic integration is now complete. Spring trials will see the REF glide across Lake Geneva with the Swiss Alps as backdrop. After lake testing, the boat will be displayed at the Monaco Energy Boat Challenge in 2026, an international showcase for clean‑energy vessels.

What It Means\ A 35‑knot, 250‑km range places the REF among the fastest zero‑emission watercraft, suggesting that solar‑hydrogen hybrids can compete with conventional motorboats. Successful lake trials will validate the system’s reliability in real‑world conditions, paving the way for broader adoption in tourism, recreation, and short‑haul transport. The Monaco appearance will expose the technology to investors and regulators, potentially accelerating commercial development of hydrogen‑powered marine vessels.

Looking Ahead\ Watch for performance data from the spring lake trials and the REF’s impact at Monaco 2026, which could set new benchmarks for sustainable maritime mobility.