VETUS thruster review: what you get and who it suits

The short answer

What they publish

Our database holds 47 VETUS models in 5 series. The list below sorts them by type, then by VETUS’s own series, with a line on what each series adds and the run time its documents state. An ignition-protected build sits under the model it is built on. Open a type to see its models; every name opens that model’s page.

What they publish about the system

Sources: the warranty policy, the maintenance manual and the BOW PRO user manual. The installation manuals are for the BOW55 (and its 2019 revision), BOW75, BOW95, BOW125, BOW PRO 185 mm, BOW PRO Boosted 250 mm, STE and RIMDRIVE. The webshop pages are for the BOW5512D, BOW7512D, BOW9512D, BOW12524D, BOW5512DI, BOWA0651, BOWB090, BOWB210, RD160, STE7512D and BOW954DE.

How long a VETUS can run

VETUS rates run time per model, in the installation manual. The rating is a motor duty: S2A motor rating from the electrical standards: the motor can run at full power for the stated number of minutes from cold, then must rest. "S2 - 4 min." means four minutes. and a number of minutes, with a footnote that spells it out. The BOW55's manual says "4 min. continuously or max. 4 min. per hour at 375 A (12 Volt)". The other manuals give these figures:

So there is no single run time for the range. At 12 V every bigger unit gets less time than the BOW55. The 24 V version of each gets the same or more, because it draws half the current for the same work.

Every one of those manuals adds that bigger batteries on shorter, fatter cables raise the thrust. It then adds a warning: "In such cases the maximum length of usage must be reduced in order to prevent damage to the motor."

The webshop prints a "Continuous operating time (min)" cell on every product. On the 12 V pages it agrees with the manuals: "4" on the BOW5512D, "2" on the BOW7512D and "3" on the BOW9512D.

For docking, the limit matters less than it sounds. A docking uses a few seconds of thrust at a time, so a limit of a few minutes an hour is one you are unlikely to meet.

A Grand Banks 46 owner read a BOW160 as "4.5 minutes continuous and 4.5 max per hour" in 2018. He and the rest of the thread could not see themselves using it. In the thread's words: "Can't imagine using max runtime."

The BOW PRO and the RIMDRIVE

The BOW PRO is brushlessA motor with no carbon brushes: electronics switch the current instead. Nothing wears inside the motor, it runs cooler, and it costs more. and proportionalA thruster with a controller between the battery and the motor, so the joystick sets how hard it pushes rather than just on or off. The motor and the mounting are the same. Only the control differs.. Its documents give its run time like this:

The RIMDRIVE is the one product whose page says "unlimited". It is a rim motor, cooled by the water it sits in. The discontinued extended-runtime BOW954DE's page says "5 - 8".

Their length chart beside our sizing

VETUS publishes a sizing method and a length chart, and this site carries both. The method counts 75% of the wind's push on a flat wall of the same size (VETUS's "streamlining factor" of 0.75). It puts the wind's leverThe distance from the point the boat turns about to the place the push is applied. Double the distance and the same push turns the boat twice as hard. at 50% of the length.

The chart gives each standard model a boat-length band. Our size calculator works out the thrust your boat needs, and it prints that chart's answer beside ours for any length.

Take the BOW5512D as an example. Its page says it suits boats of 26 to 39 ft. At the top of that band, 39 ft, VETUS's own chart offers 8 models from 55 to 105 kgfKilogram-force, the metric thrust rating most European makers publish. One kgf is about 2.2 pounds of push, so a 50 kgf unit is roughly 110 pounds. (121 to 231 lb). The BOW55 at 121 lb is the bottom of it.

At the same 39 ft, our own sizing asks a tunnelA tube bored straight through the hull below the waterline, with a propeller in the middle of it. It is the conventional thruster. Fitting one is mostly a labor job rather than a hardware one. unit for about 98 lb on a sailboat. On a motor yacht it asks for about 103 lb, in a 15 knot breeze. On the sailboat the BOW55's 121 lb steers her at about 17 knots; on the motor yacht, at about 16.

The top of VETUS's own band at that length, 231 lb, is above our motor-yacht figure. The chart is a maker's list of what it sells at each length, and it does not ask what the boat is. Ours does, and works out the windageThe area of the boat the wind can push on: the hull sides, the cabin, the mast and rigging, or the canopy. A tall, boxy boat has a lot of it, and wind force does not care how slowly you are moving. from the type.

What it drills

A tunnelA tube bored straight through the hull below the waterline, with a propeller in the middle of it. It is the conventional thruster. Fitting one is mostly a labor job rather than a hardware one., in every series but one. The BOW, ignition-protectedBuilt so it cannot make a spark that would ignite gasoline fumes. Required for anything electrical in the same compartment as a gasoline engine or tank., BOW PRO and Boosted units go through the bow below the waterline. The tube is 150, 185 or 250 mm on the models in the table, glassed in and faired smooth into the hull, with a drill pattern published per diameter.

The ignition-protected line exists for a boat whose thruster shares a compartment with gasoline.

The STE is the exception. It is a swing retractableA thruster that lives inside the hull and drops down through a hatch when you press the button, then pulls back up. It leaves no permanent hole in the water flow. that drops the same kind of unit through a box in the bottom. It has "a seamless bottom plate attached directly to the propeller duct" to cut drag when retracted.

The STE waits 1.5 seconds between direction changes "to prevent stress on gears". It retracts by itself "if it remains unused for fifteen minutes".

The RIMDRIVE is a tunnel too, 250 mm. Its motor is the ring around the propeller, where other units have a gearbox above it. Its manual puts the tunnel centerline "at least 250 mm below the waterline".

Batteries, current and the BOW PRO rule

The standard manuals print a battery table in cranking ampsCold cranking amps: how much current a battery can deliver in a short, hard burst, which is the rating starter batteries carry. A thruster draws like a starter, so the makers size its battery this way rather than by capacity., with a minimum and a maximum. The May 2026 revision of the BOW55 manual gives the 12 V unit one battery of 625 to 1250 CCA. It gives the 24 V unit two of 342 to 683.

The December 2019 revision gave 700 to 1300 (85 to 200 amp-hoursHow much a battery can supply slowly, over hours: ten amps for ten hours is a hundred amp-hours. It is the right measure for lights and a fridge. It is the wrong one for a thruster, which wants a lot of current for a few seconds.) and 500 to 650. Between the two revisions, the minimum came down and the amp-hour column went away.

The maximum is there because a bigger bank raises the thrust, and the run time then has to come down. The manuals also give this advice: "We also recommend that each bow thruster is powered by its own separate battery or batteries."

Our battery page holds the table and the maker's verbatim positions. The wiring page computes every manual's cable table. It also shows that the main fuse sits at 60% to 73% of the stated draw on the brushed units.

Owners' figures match the manuals'. The owner who chose 24 V next time put the 12 V problem this way: "the current required to get 6kw in a 12v system is enormous, 600+ amps. Getting 10.5v from LA batteries at that load may be unrealistic".

On a 24 V BOW160 in 2018, an owner read the specs like this: "The Vetus specs show the nominal current draw is 540 amps but a fuse size of 355 amps. Hmmm?"

The BOW PRO rule

The BOW PRO changes the relationship between voltage and thrust, and its documents say how: "The thrust delivered is, within certain limits, not dependent on the battery voltage."

The controller starts reducing power at 10.5 V on a 12 V system (21 on 24 V). It stops at 10 (20).

The maintenance manual's floor while running is the same 10.5 V for BOW PRO. The brushed BOW's floor is 9.5 V, and either needs 12.6 V at rest.

Holding the thrust through that sagThe drop in a battery’s voltage while a heavy load is drawing from it. The battery recovers when the load stops, but the motor only ever sees the sagged figure. has a cost, and the 185 mm manual prints it. The BOWA0651 draws 237 A at 12 V and 271 A at 10.5 V, on a 2.7 kW motor. That is 14% more current for the same output, by our arithmetic.

The Boosted series

The Boosted series puts a DC-to-DC chargerA charger that takes the boat’s 12 volt supply and puts out a different voltage. It lets a 24 or 48 volt thruster bank charge from a 12 volt boat. in the unit. A 24 or 48 V thruster bank at the bow is then fed from the boat's 12 or 24 V system over a small cable.

That is the design answer to a long run forward. It is also why the Boosted pages print 12/24 or 24/48 volts. The troubleshooting page walks through the BOW PRO's own fault codes from its manual.

The warranty and who it runs through

The policy is public and numbered, which is more than most makers give. Its headline is three years: "Since January, 1st, 2011, the warranty on all VETUS equipment is 3 years".

Then come the conditions.

One out-of-warranty exchange is on record, on a Carver 440, BOW16024C of 2012 or 2013. Its tailpieceThe gearbox at the bottom of a tunnel thruster, in the water. It turns the motor’s shaft through a right angle to drive the propeller. Some makers call it the gearleg. gear let go in May 2025. The owner wrote that the maker's office "suggested that at 12 -13 years I had gotten my money's worth out of the thruster... not sure that I agreed with that but oh well."

On the other side of the ledger, a 2006 motor was rebuilt at an alternator shop for less than half the price of a new one, "which was also available". A 2021 owner's rep "emailed" a troubleshooting PDF the same day.

The 2024 US program is the maker's answer to "which dealer". It names an installer and gives "the assurance of a three-year warranty" on the job. Its press release is also the document that says "unlimited runtime".

What owners report

The reports run from 2007 to 2026. Quotes are as written.

None of the threads we read carries a BOW PRO or a RIMDRIVE in service beyond the Tollycraft owner's order in 2018. The brushlessA motor with no carbon brushes: electronics switch the current instead. Nothing wears inside the motor, it runs cooler, and it costs more. range is too new on the forums for a record.

Strengths and limitations

Of the 8 limitations, 4 are findings about the maker's own documents. The rest are owners' accounts.

Who it is for

VETUS suits any boat with room for a tunnelA tube bored straight through the hull below the waterline, with a propeller in the middle of it. It is the conventional thruster. Fitting one is mostly a labor job rather than a hardware one., and an owner who wants to read the manual before the quote. Its documents say what the unit will do, for how long, at what current, and what it needs to stay under warranty, model by model.

Good fit if

• Your boat has room for a tunnel, and she can come out of the water for the job.
• You want the run time, the current and the cable sizes in writing before you order.
• A dealer will do the yearly maintenance, which the warranty needs.

Within the range, each series has its own case:

• BOW: the standard range: what a European builder fits and what a US yard knows how to price.
• BOW IP: the ignition-protected line, for a gasoline boat.
• BOW PRO: for the owner docking alone who wants proportional control and thrust that holds as the bank sags.
• BOW PRO Boosted: for a long cable run to the bow that a 12 V cable would lose too much on.
• RIMDRIVE: if you want the run-time question gone and have a 48 V bank to feed it.
• STE: for a sailboat that will not carry a tunnel's drag.

Look elsewhere if

• You do your own yearly maintenance and want the warranty to hold. Doing it yourself puts the claim at risk.
• The boat cannot come out of the water. The job needs a haul-out.

For the BOW PRO, plan on the manual's 10 minutes of run time, whatever the press release says. The Bow 55 and Bow 75 sit beside the other routes, length by length, on the sailboat guide and the trawler guide.

What it costs

The maker's webshop shows no price, so what a US buyer sees is the dealers' retail. Our database holds 32 VETUS rows with one, from Defender, Fisheries Supply, Fawcett, captured 28 August 2026 to 15 October 2026. The other 15 rows are the maker's own listings and dealers' pages without a price.

What owners paid installed

Installed, the record is what owners wrote. A Grand Banks 46 owner's two quotes for a BOW160 in Jan 2018 "have been mid teens".

By his reading of street prices, a competitor's proportionalA thruster with a controller between the battery and the motor, so the joystick sets how hard it pushes rather than just on or off. The motor and the mounting are the same. Only the control differs. unit was about $1,000 more than the VETUS. He was told a proportional unit was "not really needed and much more expensive +30%".

A Tollycraft 53 owner contracted the same month for a pair of 48 V RIMDRIVE units. The job had dedicated banks, chargers and dual controls, at "~$35,000 all in". The other installer he asked was nearly $10,000 more for the same job with one battery bank.

A 39 ft Azimut's two quotes in May 2024 had "no significant difference in price" between a 24 V VETUS 9524 and a 12 V competitor. Both came with dual station, dedicated battery and charging.

Repairs on record

• A tailpieceThe gearbox at the bottom of a tunnel thruster, in the water. It turns the motor’s shaft through a right angle to drive the propeller. Some makers call it the gearleg.: "$2,000 in parts".
• On a 2002 unit: $450 for brushesSmall carbon blocks inside a motor that press on the spinning part and carry the current into it. They wear down, they shed dust, and they are the usual reason an old thruster motor stops. and $250 for a solenoidAn electrical switch worked by a small current that closes a large one. In a thruster it connects the battery to the motor when you press the joystick, and it is a common part to fail. Solenoid, relay and contactor are three names for this one part..
• Shear pinsA small, deliberately weak pin between the shaft and the propeller. If the propeller jams on a rope, the pin breaks instead of the gearbox, and it costs a few dollars to replace.: "$35 for a pack of 5".

Our own estimate

Our own yard estimate for the Bow 55 on the sailboat row of the cost matrix is $9,254 to $18,867 all in. It is the same yard estimate the thruster finder, our free tool that matches a thruster to your boat, gives at that length.

When the name says 75 and the page says 80

VETUS names its units by thrust in kilograms-force (kgfKilogram-force, the metric thrust rating most European makers publish. One kgf is about 2.2 pounds of push, so a 50 kgf unit is roughly 110 pounds.). The BOW5512D is 55 kgf, 12 V, on/off ("D").

On 13 September 2026, 4 product pages printed a bigger figure than their own name: BOW7512D (75 in the name, 80 on the page), BOW12524D (125 in the name, 140 on the page), STE7512D (75 in the name, 80 on the page), BOW954DE (95 in the name, 100 on the page).

The webshop's category listing gives the BOW7512D 75 kgf. The product page for the same unit gives 80. Our size calculator uses the listing's figure when it prints VETUS's chart beside our answer.

Our database holds Defender's Bow 75 listing, which collapses the 12 and 24 V models. It carries the 24 V unit's 187 lb as the headline, with the 12 V unit's 165 beneath it.

The current cell: size from the manual

The current cell runs the other way. Every standard product page we read prints a smaller current than the installation manual for the same unit.

The gap is 20 to 50 A. The manual's figure is the one the cable table and the fuse are sized from, and the one the model list above prints.

No newer manual explains the gap. On 13 October 2026 each of these pages still linked the manual we read: BOW55 revision 8 (May 2026), BOW75 revision 8 and BOW95 revision 7 (January 2025), and BOW125 revision 5 (January 2025).

On 13 September 2026 the webshop also had a page for a unit VETUS no longer makes, the extended-runtime BOW954DE: 100 kgf at 24 V, with a run time printed as "5 - 8". Our database does not hold it.

Two plain errors

The BOWB090 page prints "Voltage (V) 46380" where the BOWB210 page prints "24/48". A spreadsheet turned "12/24" into a date.

The BOW7512D and STE7512D pages print "Weight (lbs) 4,4" beside "Weight (kg) 19" and "31". That is the kilowatt figure in the pounds cell.

These look like copying errors on the product pages. Trust the manuals.

Videos

Two of VETUS’s own videos, from its YouTube channel: the BOW PRO tunnel range, and its retractable going in and out. They are the maker’s pitch. Watch them for what the units look like and how they go in, and take the claims to the sections above.

Play the video: Product Spotlight: BOW PRO Thrusters It loads from YouTube when you tap.

Play the video: Product Spotlight: Retractable Bow Thruster It loads from YouTube when you tap.

Questions to ask before you order

Most of these are answered in the manual. Ask them anyway, and get the answers for your own boat in writing before the tunnel is cut.

• Which model, and what does its manual say the run time is? It is 4 minutes on the BOW55 and 2 on the BOW75 at 12 V, and the 24 V version runs longer. The product page can print the wrong voltage's figure.
• Which thrust figure is the quote using, the name's or the page's? On 4 models the page prints more than the name. A competitor's figure may be at a different voltage again.
• Which voltage: 12 V, 24 V, or Boosted? The manuals give the current at each. An owner's "600+ amps" at 12 V is why the same owner recommends 24. The Boosted unit brings its own bank voltage to the bow.
• Which fuse and cable, from which document? The manual's current is 20 to 50 A above the product page's on the standard units. Size from the manual.
• Who does the yearly brushSmall carbon blocks inside a motor that press on the spinning part and carry the current into it. They wear down, they shed dust, and they are the usual reason an old thruster motor stops. and anodeA block of zinc or aluminum bolted to the thruster that corrodes on purpose, so the seawater eats it instead of the gearbox. It is replaced when it is about half gone, usually once a year. check, and does the warranty need it to be the dealer? Article 8 says a claim is void if required maintenance was not done by an authorized dealer. Ask the dealer what they will write down.
• What does a claim cost me? Labor, transport, cranage and lifting are excluded by article 9. The claim goes to the seller, and the maker will not deal with you directly.
• On/off or BOW PRO? The proportionalA thruster with a controller between the battery and the motor, so the joystick sets how hard it pushes rather than just on or off. The motor and the mounting are the same. Only the control differs. unit holds its thrust to 10.5 V and is rated 10 minutes. One 2018 owner was told proportional was "much more expensive +30%" and decided against it.
• What is the sacrificial part on this model, and is it a shear pinA small, deliberately weak pin between the shaft and the propeller. If the propeller jams on a rope, the pin breaks instead of the gearbox, and it costs a few dollars to replace. or a coupling? The BOW160 owner found no pin and a clutch coupling. The small-unit owner found a cross pin.
• Will there be parts in fifteen years? The 2002 boat's owner found everything "obsolete". Ask which of today's parts fit the last generation.