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Thruster specs
VETUS Bow Pro 304: specs, price and the boats it fits
The Bow Pro 304 is the small BOW PRO built for boats that already run on 48 V, such as those with electric propulsion. It fits boats up to about 24 ft and gives 66 lb of finely controlled push, with a brushless motor and a joystick that sets how hard it pushes.
Not sold in the US right now. No US store or distributor lists the VETUS Bow Pro 304: we checked Defender, Fisheries Supply and Citimarine on October 15, 2026. Its specs and parts stay here for owners of boats built or bought abroad. For one to buy here, see the models on the VETUS thruster review that have a US price.
VETUS sells it by quotation through its dealers, so a dealer will price it for you. Besides the unit you’ll need the tube, a control panel, a main switch and fuses, which we put at about $419 to $911. It draws from a 48 V bank of four batteries in series, and those batteries, the cable and a charger come to about $1,813 to $1,874. See what else to buy.
On a 48 V boat the current stays low and the cables can be long and light. VETUS gives it the same 10-minute rating as the 12 V version. With no brushes to service, care comes down to a yearly zinc change, and dealer servicing keeps the three-year warranty.
The full spec sheet for a yard sits lower down, and the VETUS thruster review covers VETUS’s whole range.
Where this summary comes from (6 sources, read 12 October 2026)
- VETUS webshop, BOWA0304
- VETUS installation manual for the BOWA0304
- VETUS BOW PRO user manual 020810.04 (thrust not dependent on battery voltage; run time limited by the batteries)
- VETUS Maintenance and Warranty Manual for thrusters, 020901.02
- VETUS warranty policy (three years since 2011, claimed through the dealer)
- VETUS, Our Legacy (founded 1964, first bow thruster 1982, Yanmar Group 2013, BOW PRO 2018)
Key facts
- DIY level 2 of 5 Wiring prep only
- Thrust 66 lb 30 kgf, VETUS's rating
- Boat length Up to 24 ft VETUS's own range
- Price No US price None is published, so there is no fitted cost to work out
- Fitted by a yard No total No price to build on
- Voltage 48 V As sold
- Mounts Tunnel Fixed mount, bow
- To fit it Haul-out The boat comes out of the water
- Run limit 10 min At a stretch, the user manual's S2 rating
Every figure here is the maker’s or a dealer’s. No US price is published, so there is no fitted cost to estimate. The full spec sheet is further down.
How much of the install is yours
DIY levels
- Level 5: Owner install. No yard, no electrician.
- Level 4: You fit it, electrician connects. You mount and wire it; a marine electrician makes the final connections.
- Level 3: Split with the yard. The yard does the below-waterline part; you do the wiring.
- Level 2: Wiring prep only. The yard fits the unit and does the hull work; you do the wiring prep.
- Level 1: Yard job. A qualified professional does all of it.
You Yard Electrician. The bar is labor hours; a haul-out is a note.
How we rate DIYYou: 4 to 16 h Yard: 32 to 70 h Electrician: 2 to 4 h Plus a haul-out.
- Cut, bond and fair the tunnel; fit the gear leg, motor and propeller Yard 32 to 70 h The low end is two crew over two days, the job as owners describe it on the forums. The high end rises with boat length between two real billed figures: 32 hours at 35 ft, and the largest invoice we hold, 70 hours at 47 ft.
- Mount the battery box, switch and fuse holder; run and secure the cables You 4 to 16 h Our estimate. No maker times this step, and a first-time owner is slower than a yard, so the range is wide.
- Final connections at the battery and the motor, load test Electrician 2 to 4 h Our estimate. Nobody publishes a time for the final connections and test on their own.
Your part needs:Heavy battery cableCrimping big lugs
A qualified marine electrician should make the final connections and test them before first use. Hours are labor only.
Is it right for your boat?
Our figure is the longest boat one unit can steer in a 15 knot wind. It is a range because each kind of boat catches the wind differently. Here every kind of boat it fits gets full thrust to 26 ft. The maker gives one range for every boat.
The table below tries the VETUS Bow Pro 304 on each kind of boat, at every length that kind of boat is built in. The wind is 15 knots and the rules are the finder’s own. A length counts as a fit when the unit gives the thrust that boat needs at the bow and the maker lists it for that length.
A boat up to 10 percent past the maker’s range still counts here, as it does in the finder. So the table runs up to 26 ft, just past VETUS’s own range (up to 24 ft).
| Boat | Full thrust at 15 knots | Still a fit, in lighter wind |
|---|---|---|
| Pontoon & tritoon | Not listed. A pontoon has no hull body between the logs to bore a tunnel through, and nobody sells one for these boats. | |
| Sailboat | 23 to 26 ft | None |
| Houseboat | No length. Outside the maker's length range. | |
| Catamaran | No length. Outside the maker's length range. | |
| Trawler | 23 to 26 ft | None |
| Motor yacht | No length. Outside the maker's length range. | |
| Bass & flats | Not listed. Nobody sells a tunnel kit for these hulls, and a bass boat’s shallow planing bow has almost no depth to hold one. | |
| Wake & ski boats | Not listed. Nobody sells a tunnel kit for these hulls. | |
| Express cruiser | No length. More thrust than the boat needs. | |
| Center console | No length. More thrust than the boat needs. | |
Reading the two length columns. The first column is where one unit gives all the thrust the boat needs in 15 knots. The second is where the finder still lists it: the unit falls short of what the boat needs by no more than 10 percent, and gives the whole figure only in the lighter wind named. On a boat shorter than the first column’s shortest length, the unit is more than the boat needs.
It is sized for two kinds of boat here. For your own boat, the finder gives an answer that also counts your drive and who does the fitting. The compare page sets this unit beside others.
What it costs fitted
No US dollar price is published for the VETUS Bow Pro 304, so we build no total for it. The yard’s share of the job is on the cost page.
The sizing and the costs on this page are estimates, for guidance only and without warranty. They are no quote, and nobody has inspected your boat. Check them against the maker’s manual and your yard before you rely on them. Terms of use.
What else you buy
What follows comes from VETUS’s BOW55D installation manual 020522.11 r08 and the BOW PRO Boosted manual 020808.04 r09, May 2026 and February 2026, read 30 September 2026.
- In the box
- The unit assembled or in parts, the zinc anode, insulated gaskets, the drill template, the solenoid switches and the 5 A control fuse on the motor. BOW PRO: the thruster fuse in the connection unit.
- Bought separately
- The tunnel, the main switch (BATSW250 or BATSW600), the main fuse (ZE) and holder (ZEHC100), the cable, the control panel and its cable.
- Charging
- Every VETUS manual wants "its own separate battery or batteries" near the thruster, sealed if it shares the motor's compartment. The BOW PRO Boosted units carry a charger (12 V, 80 A) fed from the boat's bank, with a fused feed cable. The other manuals show an alternator and a battery separator on the wiring diagram and say nothing more.
The manual’s words, page 22 of the Boosted manual: “By connecting the 24 Volt battery bank to the MCVB boosted charge connection, the 48 Volt, battery bank is charged. An additional charging facility is not required.”
A yard job adds these parts on top of the unit: $419 to $911 for the priced ones below, at Fisheries Supply’s prices on 30 September 2026, plus the batteries, cable and charger.
| Part | What it is | What to ask for | Dealer price |
|---|---|---|---|
| Tunnel tube | The fiberglass, aluminum or steel pipe the thruster sits in, bonded through the bow. | BP110G75, BP110G10 (30 in, 40 in) | $90–$108110 mm fiberglass tunnel tubes up to 60 in (1.5 m) long (VETUS), at Fisheries Supply, read 16 October 2026. |
| Control panel | The buttons or joystick at the helm. One helm, one panel: a second steering station needs a panel of its own. | BPSE2 push buttons, BPJSTA joystick, BPJE2 or EZDOCK2 | $219–$374Side-Power touch panel and single joystick, VETUS push-button panel, Lewmar single joystick, at Fisheries Supply. |
| Control cable, panel to motor | The thin cable from the helm to the motor. Sold by length. | VETUS panel cable, by length | $29–$173Side-Power control cables, VETUS panel cables, Lewmar Gen 2 connecting cables, at Fisheries Supply. |
| Main fuse | A slow-blow fuse of the ANL type at the battery, in the size the maker prints for the model. | ZE series slow-blow, the rating in the yard table below | $18–$57Side-Power ANL fuses, Blue Sea ANL fuses, at Fisheries Supply, read 16 October 2026. |
| Fuse holder | The block the ANL fuse bolts into, with a cover. | ZEHC100 | $27–$93Egis and Blue Sea ANL fuse blocks, Side-Power ANL fuse holders, at Fisheries Supply, read 16 October 2026. |
| Main battery switch | The switch that cuts the thruster off from its battery when you leave the boat. | BATSW250 (BATSW600 on the bigger units), or BPMAIN12/24 for a remote switch | $35–$107Egis m-Series 300 A, Blue Sea e-Series 350 A and HD-Series 600 A on/off switches, at Fisheries Supply, read 16 October 2026. |
| Battery cable and lugs | The two heavy cables from the battery to the motor, sized to the length of the run. The wiring calculator sizes them. | VETUS names none | In the electrical line |
| Battery bank | A cranking-type bank near the motor, sized by the maker's cold cranking amps. The battery calculator checks it. | VETUS names none | In the electrical line |
| Charger or charge feed | How the thruster bank gets charged: a shore charger of its own, a DC-to-DC charger or charging relay from the boat's system, or a charger built into the unit. | VETUS names none | $146–$305NOCO GEN5X2 shore charger, Victron Orion-Tr Smart DC-DC charger, Blue Sea ML-ACR charging relay, at Fisheries Supply. |
| Glass, resin, filler and sealant | What bonds the tube or housing into the hull and seals the gear leg. | VETUS names none | Not priced |
The cost page has the whole list with what every maker says about each part.
For the yard and the installer
The full spec sheet, grouped the way a yard reads it. Every figure is the maker’s or a dealer’s, with its source.
| Thrust and motor | |
|---|---|
| Thrust | 66 lb (30 kgf) As printed: Thrust (kgf) 30 (VETUS webshop, specifications tab) |
| Motor | 1.2 kW |
| Voltage | 48 V |
| Fitting | |
| Type | Tunnel, fixed mount |
| End of the boat | Bow |
| Tunnel diameter | 110 mm |
| What it does to the hull | Tunnel bore below the waterline |
| Haul-out to fit it | Yes |
| Maker’s boat length | Up to 24 ft |
| Price and ordering | |
| Price | No US price published |
| Part number | BOWA030448 V |
| Documents | |
| Manual | Installation manual (PDF)on the maker's site |
| Warranty | VETUS gives 3 years, or 1 for professional use, and it transfers to the next owner. Claims go through the dealer only. It is void unless an authorized VETUS dealer does the periodic maintenance, and transport, labor and lifting are excluded. VETUS's warranty policy |
| The site’s review | VETUS thruster review |
Draw, cable, fuse and battery, at each voltage
These are the maker’s own figures, at each voltage it is sold at. The cable is the size for the shortest run in the maker’s table. A longer run may need heavier cable, and the wiring calculator works that out for your own boat.
| Voltage | Draw | Maker’s cable | Fuse | Battery | Run limit |
|---|---|---|---|---|---|
| 48 V | 45 Anominal draw | 2 AWG for up to 140 ft of cable counted out and back. Longer runs take heavier cableinstallation manual 020802.05, r07, December 2025 | 100 A, and 80 A (ZE80) in the controllerinstallation manual 020802.05, r07, December 2025 | 4 x 60 Ah - 12 V, in amp-hoursVETUS installation manual 020802.05, r07, December 2025 | 10 min at a stretch, the user manual's S2 ratingBOW PRO user manual |
- At 48 V: size the cable for your run, or check the battery you have.
What to weigh
Each point names the fact it rests on.
What to weigh
- The boat comes out of the water to fit it: it needs a tunnel bore below the waterline.The mounting: a bore through the hull, or a housing recessed into it
- No US dollar price is published for it, so we can work out no fitted cost.The maker and the dealers the database reads
What the manual and listings say
This is the note we keep on the VETUS Bow Pro 304, written from the maker’s manual, its product pages and the dealer’s listing.
In the box: Proportional: the joystick sets how hard it pushes. The thruster fuse sits in the connection unit.
Our note
The 48 V version of the smallest BOW PRO, built for boats with 48 V electric propulsion, in the same 110 mm tunnel as the 12 V unit. It is brushless and proportional, so the joystick sets how hard it pushes instead of switching it on and off. The installation manual rates it at 10 minutes (S2).
It gives 45 A at 48 V (50 at 42) and an example battery of four 60 Ah 12 V batteries. It calls for a 100 A main fuse and an 80 A fuse in the controller that must stay in place. No US dealer listed it on 18 September 2026. VETUS sells it by quotation from its own webshop.
Videos
Two of VETUS’s own videos, from its YouTube channel: the BOW PRO range in short, and the full BOW PRO electrical and mechanical install. They are the maker’s pitch. Watch them for what the unit looks like and how it goes in, and take any claim back to the figures above.
Other sizes and close alternatives
VETUS also sells this thrust built another way. Each has its own page:
- At 12 V: VETUS Bow Pro 301, $2,857.
These are VETUS’s nearest sizes by thrust, in any of its lines.
- One size down: VETUS Bow 25, 55 lb, $1,619.
- One size up: VETUS Bow Pro 361, 79 lb, $3,188.
These are other makers’ units of the same style, for the same end, within a quarter of its published thrust. Each is that maker’s nearest match.
- Sleipner SE25/110S, 66 lb, $1,485.
- Lewmar 110TT Thruster Kit, 62 lb, $936.
- Max Power CT35, 77 lb, $1,276.
Every model with a page here is listed, maker by maker, on the thruster index.