Electric Hydrofoil Boats: Why the Marine Industry Is Suddenly Flying
Electric hydrofoil boats spent most of the last decade as a niche curiosity, a handful of Swedish prototypes and enthusiast forum threads. That changed fast. In the space of about eighteen months, a Belfast propulsion company put a fully electric pilot boat on the River Thames for the world's press, a Norwegian ferry operator placed the largest single order for hydrofoiling ferries yet recorded, and a British car ferry operator started training crews to fly a foiling vessel across the Solent. None of this is speculative. It is procurement, delivery schedules and sea trials, and it is happening now.
This piece sets out what an electric hydrofoil boat actually is, how the underlying physics has stayed almost identical since Alexander Graham Bell set a world water speed record on it in 1919, and why the technology has moved from lab curiosity to commercial fleet order inside the last two years. It also looks honestly at where hydrofoiling still struggles, because the marine press has largely covered the wins and skipped the caveats.
What Is an Electric Hydrofoil Boat?
An electric hydrofoil boat is a battery-powered vessel fitted with underwater wings, called foils, that lift the hull clear of the surface once the boat reaches a set speed. Raising the hull cuts wetted surface area and drag, so the boat needs far less energy to keep moving. That efficiency gain is why hydrofoiling and electric propulsion have become natural partners, since it offsets the lower energy density of marine batteries compared with diesel.
The Physics in Plain Terms
Picture an aircraft wing mounted beneath the hull instead of on it. Below roughly 12 to 18 knots, depending on the design, the boat behaves like any other displacement or planing craft, pushing through the water. Past that threshold the foils generate enough lift to raise the hull, and the vessel transitions from ploughing through waves to skimming above them. Multiple manufacturers and analysts, including Candela and the marine research outlet EVWORLD, put the resulting drag reduction at up to 80 percent compared with a conventional hull at the same speed.
A Technology That Predates the Jet Engine
Hydrofoils are not new. Italian inventor Enrico Forlanini built the first working hydrofoil boat in 1906, reaching close to 37 knots on Lake Maggiore. Alexander Graham Bell and his engineer Casey Baldwin, inspired by a demonstration ride with Forlanini in 1911, spent the next eight years developing their own hydrofoil, the HD-4. On 9 September 1919, on Bras d'Or Lake in Nova Scotia, the HD-4 set a world marine speed record of 70.86 mph, or 61.58 knots, a record that stood for close to a decade. What is genuinely new is not the foil. It is pairing that century-old lift principle with lithium-ion batteries, fly-by-wire flight control software and direct-drive electric motors capable of running maintenance-light for thousands of hours.
Why Electric Hydrofoils Are Dominating Marine Headlines Right Now
Three separate, independently verifiable developments explain the current wave of coverage, and all three sit outside the recreational boating press that used to be hydrofoiling's only audience.
Boreal's 20-Boat Order From Candela
Norway's Boreal, one of the country's largest public transport operators, has ordered twenty Candela P-12 electric hydrofoil vessels, described by the boating news outlet Plugboats as the world's largest electric hydrofoil fleet commitment to date. The context matters: Norway already runs the world's most electrified car market, with electric vehicles accounting for roughly 99 percent of new car sales, yet its high-speed fjord ferries had remained diesel because conventional electric ferries lack the range and speed to compete. Candela's hydrofoiling system, which lifts the P-12 clear of the water above 18 knots, is the first technology credibly positioned to close that gap.
A Fully Electric Pilot Boat on the Thames
In a showcase co-hosted by Port of Tyne chief executive Matt Beeton and Artemis Technologies chief executive Iain Percy OBE, the Belfast-built Artemis EF-12 Pilot was demonstrated on the River Thames ahead of its delivery to the Port of Tyne fleet in 2026, the UK's first fully electric foiling pilot vessel. Artemis, a spin-off from the Artemis Racing America's Cup sailing team, builds its eFoiler propulsion system around carbon-fibre hydrofoils and an 800-volt marinised battery pack, and the EF-12 Pilot reaches 32 knots with a foiling range of 45 to 55 nautical miles and a sub-hour DC recharge. Customers confirmed to date include the Swedish Maritime Administration, Belgium's Brabo, Noatum Maritime in Abu Dhabi and the Port of Tyne.
A UK Car Ferry Operator Committing to Foiling Across the Solent
Red Funnel, the operator running vehicle and passenger ferries between Southampton and the Isle of Wight, has moved into the construction and delivery phase of its partnership with Artemis Technologies for a 100 percent electric Artemis EF-24 Passenger ferry. Crew training begins at Artemis's Belfast facility in December 2025, ahead of service across the Solent. This is a mainstream UK ferry operator, not a demonstration project, committing to foiling on one of England's busiest stretches of coastal water.
Taken together, these three stories explain the editorial shift. Hydrofoiling has moved from boat show novelty to a live procurement category for ports, ferry operators and transport authorities, and the UK, through Belfast, the Thames, the Solent and a UK SHORE-funded trial in Orkney, sits at the centre of that shift rather than watching it from the sidelines.
How the Leading Electric Hydrofoil Boats Compare
Specifications below are drawn from manufacturer data and independent marine press testing, current as of 2026. Figures vary by configuration and battery option, so treat ranges as representative rather than exhaustive.
| Vessel | Category | Top Speed | Foiling Range | Notable Detail |
|---|---|---|---|---|
| Candela C-8 | Recreational day boat | 30 knots | 57 nm at 22 knots | 69kWh Polestar-derived battery, from roughly €330,000, DC charge to 80% in under an hour |
| ✦ Candela P-12 | Commercial passenger ferry | ~25 knots service speed | Foiling above 18 knots | Subject of Boreal's 20-vessel Norwegian fleet order, the largest electric hydrofoil commitment on record |
| Artemis EF-12 Pilot | Pilot boat | 32 knots | 45 to 55 nm | Belfast-built, sub-hour ultra-fast DC charging, UK's first order via Port of Tyne |
| Artemis EF-24 Passenger | Passenger ferry | 38 knots claimed | Up to 115 nm | Carries up to 150 passengers, ordered by Red Funnel for Solent service |
| ENVGO NV1 | Recreational leisure boat | Not publicly specified | Not publicly specified | 26-foot foiler with twin 110kW foil-mounted motors, shown at the 2026 Palm Beach Boat Show |
| Vessev VS-9 | Tourism vessel | Not publicly specified | Not publicly specified | Built on America's Cup-derived foiling technology, launched May 2024 as a premium tourism foiler |
A pattern is visible across every commercial vessel in that table. Range and speed track closely with hull weight and battery chemistry, and the newest entrants, Candela's automotive-derived Polestar battery and Artemis's 800-volt marinised pack, are the two most credible attempts yet to solve marine electrification's core problem: batteries are heavy for the energy they store, and hydrofoiling is currently the only hull technology that offsets that weight penalty enough to deliver genuinely useful range at speed.
Recreational Foiling Versus Commercial Foiling: Two Different Conversations
The marine press tends to cover recreational hydrofoils, like the Candela C-8 or the ENVGO NV1, and commercial hydrofoiling ferries, like the Candela P-12 or Artemis EF-24, as one story. They are not the same story.
The Recreational Case
For a private owner, a hydrofoil boat solves the range problem that has limited every other electric leisure boat. Candela states that a planing hull would need a battery pack of 110kWh or more to achieve just 20 to 30 nautical miles of range, whereas its foiling C-8 covers 57 nautical miles on 69kWh. The trade-off is price. Hydrofoil day boats currently start well above 100,000 dollars and premium tenders regularly exceed 400,000 dollars, according to marketplace pricing reported by luxury mobility platform The Arsenale in 2026, putting the category firmly at the top end of the electric boating market rather than the mainstream.
The Commercial Case
For a ferry operator or port authority, the pitch is operational rather than experiential. The reduced wake from a foiling hull means vessels can run at higher speed closer to shore without the speed restrictions imposed to protect banks and moored craft, cutting journey times. Artemis Technologies states its EF-24 Passenger ferry needs meaningfully lower operating expenditure than a conventional diesel fast ferry, through both fuel-cost elimination and reduced maintenance. That is the argument persuading Boreal, Red Funnel and the UK's Department for Transport-backed UK SHORE programme, which is funding the Electric Orkney trial connecting Kirkwall with Shapinsay, Egilsay, Wyre and Rousay.
Where Electric Hydrofoils Still Struggle
Coverage of hydrofoiling has skewed heavily positive over the past two years, and some of that optimism is earned. But the technology carries real, well-documented constraints that any buyer or operator needs weighing honestly.
Shallow and debris-laden water. Foils extend well below the hull, so hydrofoils are unsuited to shallow lakes, weedy waterways or debris-strewn coastal shelves. Top Gear's test of the Candela C-8 was disrupted when lake weed fouled the foils.
Cost. Both the recreational and commercial segments currently sit at a premium to equivalent conventional or planing-hull electric craft, driven by carbon-fibre construction, active flight-control electronics and marinised high-voltage battery systems.
Mechanical and software complexity. Actively stabilised foils rely on sensors and flight-control software, which raises long-term maintenance and repair considerations compared with a simple planing hull, even though direct-drive motors themselves need little servicing.
Not suited to towing, beaching or rough recreational use. Analysis from marine outlet EVWORLD notes foiling designs excel at coastal commuting and premium leisure cruising but are not built for wake sports, towing or the beach-and-launch use common on inland lakes, a role increasingly served instead by rugged conventional-hull electric boats.
What the Electrification of Speed Means for the Wider Industry
The headline figure repeated across nearly every foiling manufacturer's marketing, an 80 percent cut in drag versus a conventional hull, is not a foiling-specific claim so much as a restatement of basic hydrodynamics that has been understood since Forlanini's 1906 boat. What has changed is that the supporting technology, battery energy density, direct-drive marine motors and computer-controlled flight systems, has only now matured enough to make that century-old principle commercially deployable at scale.
That maturity is why 2025 and 2026 have produced fleet orders rather than prototypes. Boreal's Candela order, Red Funnel's Solent commitment and the Port of Tyne's Thames-showcased pilot boat are not proof that every electric boat should foil. They are proof that hydrofoiling has become the most credible answer, at least for now, to the single hardest problem in marine electrification: how to move a vessel quickly, over a useful distance, without carrying an impractical weight of battery. Wherever that problem persists, across pilot boats, ferries, water taxis and tenders, hydrofoiling's underlying physics will keep pulling naval architects and propulsion engineers back to the same 120-year-old idea, now running on electrons instead of Liberty aircraft engines.
Frequently Asked Questions
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Top speeds vary by design and role. Candela's recreational C-8 reaches 30 knots, Artemis Technologies' commercial EF-12 Pilot reaches 32 knots, and its larger EF-24 Passenger ferry is rated up to 38 knots. Most vessels transition onto their foils, or begin foiling, somewhere between 12 and 18 knots, well below their top speed.
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Range depends heavily on cruising speed and vessel size. The Candela C-8 covers 57 nautical miles at a 22-knot cruise on a 69kWh battery. The Artemis EF-12 Pilot manages 45 to 55 nautical miles foiling, and the larger EF-24 Passenger ferry is rated up to 115 nautical miles. Range drops sharply if a boat is driven consistently at or near top speed rather than its efficient cruising speed.
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Yes, substantially. Because lifting the hull clear of the water can cut drag by up to 80 percent compared with a conventional hull at the same speed, hydrofoils need far less battery capacity to achieve a comparable range. Candela states that a conventional planing hull would need a 110kWh-plus battery to match the 57 nautical mile range its 69kWh foiling C-8 delivers.
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Charging speed varies by charger type. Candela's C-8 can reach 80 percent from a DC fast charger in around 30 to 45 minutes, or take several hours from a standard three-phase AC dock supply. Artemis Technologies' EF-12 Pilot is designed to recharge in under an hour using its ultra-fast DC charging unit, supporting continuous commercial operation.
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Italian engineer Enrico Forlanini built the first working hydrofoil boat in 1906, reaching nearly 37 knots. Alexander Graham Bell, working with engineer Casey Baldwin after riding in one of Forlanini's boats in 1911, developed his own hydrofoil, the HD-4, which set a world marine speed record of 61.58 knots on Bras d'Or Lake, Nova Scotia, on 9 September 1919.
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Hydrofoils handle chop and moderate waves well, since the hull rides above the disturbance rather than through it, and Candela states its C-8 can operate safely in waves up to a metre. They are poorly suited to shallow water, weedy lakes or debris-laden coastal shelves, since the submerged foils extend well below the hull and can foul or strike obstructions.
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Three factors have converged: batteries with enough energy density to be practical once drag is cut by foiling, direct-drive electric motors requiring minimal servicing, and mounting pressure to decarbonise short-haul and harbour transport. Recent commitments include Norwegian operator Boreal's 20-vessel Candela P-12 order, Red Funnel's Solent ferry partnership with Artemis Technologies, and the Port of Tyne's new electric pilot boat.
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Generally yes, at the current stage of the market. Recreational electric hydrofoil day boats typically start above 100,000 dollars and premium models can exceed 400,000 dollars, reflecting carbon-fibre construction and flight-control systems. Commercial operators justify the higher upfront cost against lower fuel and maintenance costs over the vessel's operating life.
A century after Alexander Graham Bell set a water speed record on a hydrofoil powered by two Liberty aircraft engines, the same underlying physics is now doing the opposite job: not chasing outright speed, but making electric propulsion viable over distances that used to be impossible on battery power alone. That is the real story behind the Thames showcase, the Solent order and Norway's twenty-boat fleet commitment. Whichever vessel type ultimately serves a given operator's needs, the direction of travel across pilot boats, ferries and water taxis is now unmistakably electric, and hydrofoiling is the technology currently making that transition credible at speed.
