Boat Thruster Guide

What to buy, what it costs, what it takes to fit

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Thruster specs

Max Power VIP 250 ECO: specs, price and the boats it fits

The VIP 250 ECO puts the proportional, brushless drive in the larger 250 mm retracting housing, giving 320 to 551 lb of push from its 9 kW and 15 kW builds at 24 or 48 V. Like the smaller ECO, it can hold full power for seven minutes and lifts out of the water when not in use.

Max Power’s leaflet gives each motor its own boat lengths, by how heavy and windy the boat is. The 9 kW unit suits boats of about 35 to 51 ft, and the 15 kW one 60 to 105 ft. The product page prints only the 15 kW unit’s range. Its 9 kW manuals recommend 950 cold cranking amps at 24 V and 700 at 48 V. Dealers quote the price. See the specs.

The 15 kW version has no battery or cable figure on this site, because the manuals on its page cover the 9 kW unit. Fitting needs a large hull opening and a housing. The 9 kW manual gives a three-year warranty.

The full spec sheet for a yard sits lower down, and the Max Power thruster review covers Max Power’s whole range.

Where this summary comes from (5 sources, read 12 October 2026)

Choose a size

The Max Power VIP 250 ECO comes in two sizes. Each has its own price, wiring and boats it suits, so pick one and the facts, the fit, the cost and the spec sheet below show that size.

Every size of the Max Power VIP 250 ECO side by side, from the database. The figures are Max Power’s and the dealers’.
SizePushVoltageMax Power’s boat lengthPrice
VIP 250 ECO proportional 9 kW 320 lb (145 kgf) 24 or 48 V 35 to 51 ft No US price
VIP 250 ECO proportional 15 kW 551 lb (250 kgf) 24 or 48 V 60 to 105 ft No US price

Key facts

  • DIY level 2 of 5 Wiring prep only
  • Thrust 320 lb 145 kgf, Max Power's rating
  • Boat length 35 to 51 ft Max Power'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 24 V or 48 V As sold
  • Mounts Retractable Drops down, end not stated
  • To fit it Haul-out The boat comes out of the water
  • Run limit Not published Ask the maker before long use

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 2 of 5: Wiring prep only. The yard fits the unit and does the hull work; you do the wiring prep.

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 DIY

You: 4 to 16 h Yard: 40 to 88 h Electrician: 2 to 4 h Plus a haul-out.

  1. Cut the hull and fit the housing and mechanism Yard 40 to 88 h Nobody publishes an hours figure. Fisheries Supply says installation is significantly more expensive than a tunnel, and that is too loose to turn into a number. So this is the tunnel’s own banded figure plus a quarter, which keeps it above a tunnel as the distributors describe it.
  2. 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.
  3. 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?

What Max Power says 35 to 51 ft The maker's own range, from its listing
What our sizing says 45 to 56 ft Full thrust in 15 knots. The longest boat of each kind is in the table.

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 a houseboat gets full thrust to 45 ft, and a sailboat to 56 ft. The maker gives one range for every boat.

The table below tries the Max Power VIP 250 ECO 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 56 ft, just past Max Power’s own range (35 to 51 ft).

The Max Power VIP 250 ECO against each kind of boat, in a 15 knot wind. Our sizing, from the finder’s own rules.
Boat Full thrust at 15 knotsStill a fit, in lighter wind
Pontoon & tritoon Not listed. A retractable drops down inside the hull, and a pontoon has no hull depth to drop into.
Sailboat 50 to 56 ft None
Houseboat 37 to 45 ft 46 to 56 ftfull thrust to about 12 knots at 56 ft
Catamaran No length. More thrust than the boat needs.
Trawler 49 to 56 ft None
Motor yacht 49 to 56 ft None
Bass & flats Not listed. A retractable needs hull depth to drop into, and these planing hulls have almost none forward.
Wake & ski boats Not listed. A retractable needs hull depth to drop into, and these planing hulls have almost none forward.
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 four 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 Max Power VIP 250 ECO, 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.

Key facts

  • DIY level 2 of 5 Wiring prep only
  • Thrust 551 lb 250 kgf, Max Power's rating
  • Boat length 60 to 105 ft Max Power'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 24 V or 48 V As sold
  • Mounts Retractable Drops down, end not stated
  • To fit it Haul-out The boat comes out of the water
  • Run limit Not published Ask the maker before long use

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 2 of 5: Wiring prep only. The yard fits the unit and does the hull work; you do the wiring prep.

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 DIY

You: 4 to 16 h Yard: 40 to 88 h Electrician: 2 to 4 h Plus a haul-out.

  1. Cut the hull and fit the housing and mechanism Yard 40 to 88 h Nobody publishes an hours figure. Fisheries Supply says installation is significantly more expensive than a tunnel, and that is too loose to turn into a number. So this is the tunnel’s own banded figure plus a quarter, which keeps it above a tunnel as the distributors describe it.
  2. 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.
  3. 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?

What Max Power says 60 to 105 ft The maker's own range, from its listing
What our sizing says 59 to 80 ft Full thrust in 15 knots. The longest boat of each kind is in the table.

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 a houseboat gets full thrust to 59 ft, and a catamaran to 80 ft. The maker gives one range for every boat.

The table below tries the Max Power VIP 250 ECO 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 down to 54 ft, just past Max Power’s own range (60 to 105 ft).

The Max Power VIP 250 ECO against each kind of boat, in a 15 knot wind. Our sizing, from the finder’s own rules.
Boat Full thrust at 15 knotsStill a fit, in lighter wind
Pontoon & tritoon Not listed. A retractable drops down inside the hull, and a pontoon has no hull depth to drop into.
Sailboat 65 to 79 ft 80 ft onlyfull thrust to just under 15 knots at 80 ft
Houseboat 54 to 59 ft 60 to 80 ftfull thrust to about 11 knots at 80 ft
Catamaran 74 to 80 ft None
Trawler 65 to 78 ft 79 to 80 ftfull thrust to just under 15 knots at 80 ft
Motor yacht 65 to 78 ft 79 to 80 ftfull thrust to just under 15 knots at 80 ft
Bass & flats Not listed. A retractable needs hull depth to drop into, and these planing hulls have almost none forward.
Wake & ski boats Not listed. A retractable needs hull depth to drop into, and these planing hulls have almost none forward.
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 five 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 Max Power VIP 250 ECO, 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 Max Power’s CT100 and CT125 installation manual, July 2024, read 30 September 2026. That manual is written for the tunnel units. A retractable unit brings its own housing, so there is no tunnel to buy.

In the box
The motor with its relay, the electronic controller, the composite leg with screws and gasket, two propellers. "The thruster is delivered without accessories (fuse, fuse holder, control panel)."
Bought separately
The fuse and holder, a manual battery isolator and an electric one, the control panel, an 8 A control fuse, a breaker on the DC panel and the battery cable.
Charging
Max Power is the one maker that asks for both: the engine's alternator and a charger. A dedicated bank is optional and goes "as close as possible to the thruster". It wants starting-type batteries with high cold cranking amps.

The manual’s words, page 3: “The batteries used by the thruster must be charged by both the main engine's alternator and an appropriate battery charger.”

A yard job adds these parts on top of the unit: $336 to $815 for the priced ones below, at Fisheries Supply’s prices on 30 September 2026, plus the batteries, cable and charger.

Parts the Max Power VIP 250 ECO’s box leaves to you, from the makers’ manuals read 30 September 2026. “What to ask for” is Max Power’s own part or model where its manual names one, otherwise the dealer’s item.
Part What it is What to ask for Dealer price
Control panel The buttons or joystick at the helm. One helm, one panel: a second steering station needs a panel of its own. A Max Power control panel, sold with its own guide $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. Max Power names none $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. Ceramic or ANL, the rating in the manual's table $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. Holder T1 OPTI3119 or T2 $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. A manual isolator, plus the electric isolator OPTI3160/3 (12 V) or OPTI3170/3 (24 V) $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.
Control-circuit fuse and switch A small fuse, and often a switch, on the thin wire that powers the panel or control box. An 8 A fuse on the control box feed $8–$12Blue Sea in-line ATO fuse holders, 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. Max Power 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. Max Power 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. Max Power 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. Max Power 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.

The Max Power VIP 250 ECO, every published figure the site holds, with where each came from.
Thrust and motor
Thrust 320 lb (145 kgf) As printed: 145 kg
Motor9 kW
Voltage24 V or 48 V
Fitting
TypeRetractable, drops down
End of the boatNot stated
Tunnel diameter250 mm
What it does to the hullLarge hull opening below the waterline
Haul-out to fit itYes
Maker’s boat length35 to 51 ft
Price and ordering
Price No US price published
Part number 636765VIP 250 ECO proportional 9 kW, 24 V
600127VIP 250 ECO proportional 9 kW, 48 V
636839VIP 250 ECO proportional 15 kW, 24 V
636827VIP 250 ECO proportional 15 kW, 48 V
Documents
Manual Installation manual (PDF)on the maker's site
Warranty Max Power's website gives 3 years. Its manual gives 2, and 1 more if the warranty is registered within 3 months of installation. Outside pleasure craft it is 6 months. It transfers to the next owner, and the first year covers up to 2 hours of labor in the field. Max Power's warranty conditions
The site’s reviewMax Power 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.

The Max Power VIP 250 ECO’s draw, cable, fuse, battery and run limit, as the maker publishes them.
Voltage Draw Maker’s cable Fuse Battery Run limit
24 VVIP 250 ECO 24 V 340 Anominal draw 3/0 AWG for up to 22 ft of cable counted out and back. Longer runs take heavier cableVIP 250 ECO 24V installation manual 250 A ceramicVIP 250 ECO 24V manual 950 CCA minimum, as the manual recommends SAE 950Max Power installation manual VIP 250 ECO 24V Not published
48 VVIP 250 ECO 48 V 190 Anominal draw 1/0 AWG for up to 22 ft of cable counted out and back. Longer runs take heavier cableVIP 250 ECO 48V installation manual 125 A ceramicVIP 250 ECO 48V manual 700 CCA minimum, as the manual recommends SAE 700Max Power installation manual VIP 250 ECO 48V Not published

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.

The Max Power VIP 250 ECO, every published figure the site holds, with where each came from.
Thrust and motor
Thrust 551 lb (250 kgf) As printed: 250 kg
Motor14.96 kW
Voltage24 V or 48 V
Fitting
TypeRetractable, drops down
End of the boatNot stated
Tunnel diameter250 mm
What it does to the hullLarge hull opening below the waterline
Haul-out to fit itYes
Maker’s boat length60 to 105 ft
Price and ordering
Price No US price published
Part number 636765VIP 250 ECO proportional 9 kW, 24 V
600127VIP 250 ECO proportional 9 kW, 48 V
636839VIP 250 ECO proportional 15 kW, 24 V
636827VIP 250 ECO proportional 15 kW, 48 V
Documents
Manual Installation manual (PDF)on the maker's site
Warranty Max Power's website gives 3 years. Its manual gives 2, and 1 more if the warranty is registered within 3 months of installation. Outside pleasure craft it is 6 months. It transfers to the next owner, and the first year covers up to 2 hours of labor in the field. Max Power's warranty conditions
The site’s reviewMax Power thruster review

What holds up and what to weigh

Each point names the fact it rests on.

What holds up

  • It is sold at 24 V and at 48 V.The maker's and dealers' listings

What to weigh

  • The boat comes out of the water to fit it: it needs a large hull opening 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 Max Power VIP 250 ECO, written from the maker’s manual, its product pages and the dealer’s listing.

In the box: Proportional. Delivered without accessories: the fuse, holder and panel are bought.

VIP 250 ECO proportional 9 kW, 24 V

The brushless, proportional version of the VIP retractable: the joystick sets how hard it pushes, and the page and manual give seven minutes of continuous running at full power, or until the battery runs out. It drops below the hull to push and retracts when released. The box holds a proportional joystick and 15 m of CAN cable; a phone app helps with troubleshooting.

Max Power publishes no price and sells through dealers. Max Power's page puts the VIP 250 ECO on yachts of 77 to 105 ft, where the electric VIP 250 of the same push is given 40 to 60 ft; the row carries no length until the maker settles it. Its manual recommends a battery of DIN 535, SAE 950 cold cranking amps.

VIP 250 ECO proportional 9 kW, 48 V

Its manual recommends a battery of DIN 395, SAE 700 cold cranking amps.

VIP 250 ECO proportional 15 kW, 24 V

The 15 kW unit; the VIP 250 ECO manuals on the page give figures for the 9 kW unit only, so this site holds no battery or cable figure for this one.

VIP 250 ECO proportional 15 kW, 48 V

The 15 kW unit at 48 V; the manuals on the page give figures for the 9 kW unit only.

Videos

One of Max Power’s own videos, from its YouTube channel: a short reel of the range. It is the maker’s pitch. Watch it for what the unit looks like and how it goes in, and take any claim back to the figures above.

Max Power’s own video, on Max Power’s YouTube channel. The picture is a still from it.

Other sizes and close alternatives

Max Power also sells this thrust built another way. Each has its own page:

These are Max Power’s next sizes in the same line, by thrust.

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.

Compare them side by side

Every model with a page here is listed, maker by maker, on the thruster index.

Where to go next

The specs are the maker’s and the dealers’, on the dates shown. The sizing and the costs are our arithmetic, done without seeing your boat.