
These 5 Luxury Yachts Take on the Seas With Eco-Conscious Engines
Innovative propulsion systems are finally becoming a reality for yachts of all sizes with names like Azimut, Feadship and Lürssen leading the charge.
In yachting, as elsewhere, “sustainability” has become a go-to buzzword, typically more bluster than breakthrough. Alternative methods of propulsion—hydrogen fuel cells and green methanol for superyachts, say, or diesel-electric power for vessels under 100 feet—have been discussed for years yet are often dismissed by builders as too complex and expensive.
But now a band of pioneering yards and owners are designing never-before- seen eco-friendlier systems with the technical bona fides to be legitimate game changers. They not only reduce emissions but also offer other tangible benefits over the status quo, from silent anchoring to smoother maneuvering. Here, five yachts charting a course for the future, today.
Sanlorenzo 50 Steel | 164 feet

Reformer fuel-cell technology
Sanlorenzo’s executive chairman, Massimo Perotti, has been so resolute about sustainability that he built the world’s first methanol-powered prototype for himself, as proof of concept. His 50 Steel Almax, a four-year project with Siemens Energy that features a stylish split-level layout and retro-chic interior from Lissoni & Partners, converts green methanol into hydrogen using a device called a Reformer. The resulting hydrogen then feeds the fuel cells, producing enough electricity to power 90 percent of the yacht’s hotel load. The engine-and-generator room occupies about 72 sqm under the aft beach club, while the 118-square-foot fuel-cell cluster is located toward the bow. Perotti sees his boat as a starting point. “Considering the pace of innovation,” he says, “it’s likely that within 10 years, we’ll see the arrival of a 100 percent methanol-powered propulsion system.”
Feadship Project 821 | 390 feet

Hydrogen storage and fuel-cell technology
The largest yacht ever launched in the Netherlands, Feadship Project 821 presents a host of amenities that surpass what’s offered on many other custom gigayachts, including an underwater lounge, a four-story atrium, 14 balconies, a library, a medical center, and a multilevel owner’s deck, all packaged in a strikingly contemporary design. But the true paradigm shift is found in the magnitude and complexity of its new propulsion system. Double-walled cryogenic storage tanks, which maintain 4,400 kilograms of compressed liquid hydrogen at minus 217 degrees celsius, feed 16 fuel cells and electric motors to power all onboard hotel needs. Meanwhile, the exhaust-recovery system heats the vast interior down to the bathroom floors. The vessel is also able to travel at a speed of 10 knots in zero-emissions mode or remain silently operational—without a diesel generator—while at anchor for a week. Of the five-year build, Jan-Bart Verkuyl, CEO of Feadship’s Van Lent yard, says, “Our aim was a new, clean technology—not just for this project, but for the world.”
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