At €3.5 million (approx. $3.9 million) per week, Feadship’s 390-foot Breakthrough is arguably the most expensive superyacht charter in the world, offering an extraordinary combination of technological innovation, lavish accommodation, and exclusivity. However, chartering this remarkable vessel comes with an unusual inconvenience that even its wealthiest guests cannot escape. Whenever Breakthrough needs to replenish its liquid hydrogen supply, everyone aboard must disembark for approximately 6 hours while the crew carries out an elaborate refueling operation. It is an extraordinary compromise for a yacht that promises virtually every imaginable luxury, but its pioneering hydrogen propulsion system demands an entirely different approach to life at sea.
Originally commissioned by Microsoft co-founder Bill Gates, Breakthrough was designed to become one of the most technologically advanced superyachts ever built. Gates reportedly never set foot aboard the completed vessel before it was sold to Canadian billionaire Patrick Dovigi, a former professional hockey goaltender who made his fortune in the environmental services industry. The yacht subsequently attracted considerable attention not only for its unusual propulsion system but also for its enormous dimensions and exceptional onboard facilities. According to BOAT International, its hydrogen-only endurance is approximately 14 days at anchor with hotel loads or 350 nautical miles when traveling at 10 knots, illustrating both the potential and practical limitations of its revolutionary powerplant.
The $3.9 million superyacht that comes with a six-hour refueling break
Breakthrough’s extraordinary charter price is matched by an equally extraordinary approach to refueling, because hydrogen is considerably more complicated to handle than conventional marine fuel. The yacht stores approximately four metric tons of liquid hydrogen at an almost unimaginable minus 253 degrees Celsius (-423 degrees Fahrenheit) inside a specialized cryogenic storage tank. During bunkering, an exclusion zone is established around the vessel, security personnel are positioned on the quay, and workers closest to the transfer wear full protective equipment that makes them resemble astronauts.
The build captain explained the restriction to BOAT International, saying, “Security needs to be in place quayside and we can’t have guests on board.” The six-hour procedure begins with the crew purging the fuel pipelines using nitrogen generated by an onboard machine before gradually cooling the system with cold nitrogen and hydrogen gas at approximately minus 190 degrees Celsius. Only after this carefully controlled preparation can liquid hydrogen enter the storage tank, while excess gaseous hydrogen escapes through a dedicated vent in the mast stack known among the crew as “the needle.”
The process is particularly demanding because hydrogen is the smallest molecule on the planet and becomes extremely flammable when mixed with oxygen, making even minor leaks a serious safety concern. Breakthrough therefore uses double-skinned pipes with vacuum insulation between their walls, while multiple sealed doors separate the hydrogen tank connection space from the engine room.
The yacht also has a dedicated bunkering safety booklet, and Feadship worked with Lloyd’s Register to develop the necessary safety procedures during construction. Its 46-member crew includes at least two full-time hydrogen engineers, while many other crew members must complete specialist training developed by the team operating the vessel. The six-hour guest restriction is specific to Breakthrough’s bunkering arrangements, rather than a universal requirement for every hydrogen-powered vessel, although it illustrates the infrastructure and operational challenges that still accompany this technology.
A hydrogen powerplant unlike anything else afloat
Built by Dutch shipyard Feadship and delivered in 2025, Breakthrough is the world’s first superyacht equipped with a fully operational hydrogen fuel-cell powerplant. Sixteen fuel-cell units supplied by Swedish manufacturer PowerCell generate approximately 3.2 megawatts of electricity, with hydrogen reacting with oxygen to produce electrical power and water as a byproduct. The installation occupies approximately 120 cubic meters of interior space, making it a substantial engineering achievement hidden beneath the yacht’s luxurious accommodation.
Its hydrogen system can support approximately 14 days of hotel operations at anchor or propel the vessel for around 350 nautical miles at 10 knots, offering an unusually quiet and emission-free experience when operating on hydrogen. However, hydrogen is not the only source of power, as Breakthrough also carries a conventional diesel and hydrotreated vegetable oil generation system that supplies electricity for its propulsion units, batteries, and onboard amenities. With conventional power, the yacht can travel approximately 6,500 nautical miles at 14 knots and reach a maximum speed of 17 knots.
Inside a floating mansion designed without compromise
Designed inside and out by British studio RWD, Breakthrough combines an imposing steel hull with an aluminum superstructure, measuring 118.8 meters in length, 19 meters across the beam, and carrying a substantial 7,247 gross tons. Its long, open bow serves as a touch-and-go helicopter landing area, but can also become a sports court featuring permanent pickleball markings requested by the original owner. The yacht’s design incorporates 10 slide-out balconies, seven fold-down terraces, and five enormous shell doors, creating an unusually close connection between its interior spaces and the surrounding ocean.
Inside, the atmosphere is considerably more intimate than its enormous dimensions suggest, with approximately 1,500 square meters of interior space finished in oak, travertine, textured fabrics, fine leather, and carefully executed plasterwork. The private owner’s deck features a spacious master bedroom with 270-degree views, separate dressing facilities, his-and-hers bathrooms, another bedroom, a private gym, an office, and a dedicated meeting room. A spectacular 14-meter staircase, a library containing thousands of books, a separate coffee nook, and several comfortable lounges further reinforce the residential character of the yacht.
Guest facilities are equally extravagant, with four VIP suites on the bridge deck and four additional suites on the main deck, several featuring private balconies that slide out from the hull. The wellness center includes a fully equipped gym, beauty salon, massage room, sauna, steam room, plunge pool, and ice bath, while a dedicated cinema provides deep sofa seating and its own popcorn and drinks station. One of the most unusual spaces is the Nemo Lounge, positioned inside the yacht’s stub keel, where large underwater-facing windows allow guests to observe the marine environment and even glimpse the enormous Azipod propulsion units.
Two cavernous tender garages accommodate an assortment of water toys and equipment, while a large beach club opens directly onto the sea through its folding sides and transom. The vessel can accommodate up to 30 guests for private use, although its commercial configuration is limited to 12, with a crew of 46 looking after every detail. Recognized as the 2026 Motor Yacht of the Year at the World Superyacht Awards, Breakthrough is an extraordinary demonstration of how far luxury yacht engineering can go, even if enjoying its most unusual feature means occasionally checking out for six hours.
