Boat Thruster Guide

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

We may earn a referral commission from some links on this page. It doesn't change your price or our recommendations.

Thruster specs

Sleipner SXE100 eVision: specs, price and the boats it fits

The SXE100 is the SX100 stern unit with Sleipner’s brushless eVision motor: 220 lb of push for twin-sterndrive boats of about 39 to 56 ft, with the speed set by the joystick. Like the SX100 it bolts to the outside of the transom and needs only a small hole for its cables.

Imtra lists it at $12,250, before a separate tariff line. It runs on 24 V. Expect about $307 to $642 more for the panel, fuse and switch, and $961 to $1,037 for a 24 V battery near the stern with cable and charging. The parts list.

The manual rates it continuous at full thrust at 22 C, limited by the batteries, where the brushed SX units stop after 2 to 3 minutes. It draws about 290 A. Like the rest of the range it carries Sleipner’s two-year transferable warranty.

The full spec sheet for a yard sits lower down, and the Sleipner (Side-Power) review covers Sleipner’s whole range.

Where this summary comes from (5 sources, read 14 October 2026)

Key facts

  • DIY level 3 of 5 Split with the yard
  • Thrust 220 lb 100 kgf, Sleipner's rating
  • Boat length 39 to 56 ft Sleipner's own range
  • Price $12,250 full kit, imtra.com, 14 October 2026
  • Fitted by a yard $15,878 to $20,179 Our estimate at 55 ft, unit and job
  • Voltage 24 V As sold
  • Mounts External Fixed mount, stern
  • To fit it Haul-out The boat comes out of the water
  • Run limit Continuous at 22 C ambient, typically limited by battery capacity The maker's own limit

Every figure here is the maker’s or a dealer’s, except the fitted cost, which is our estimate. The full spec sheet is further down.

How much of the install is yours

DIY 3 of 5: Split with the yard. The yard does the below-waterline part; you do the wiring.

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: 4 to 8 h Electrician: 2 to 4 h Plus a haul-out.

  1. Drill, seal and bolt the unit below the waterline Yard 4 to 8 h Our estimate. No maker times it; one owner paid his yard about a day of labor to mount two units. Source.
  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 Sleipner says 39 to 56 ft The maker's own range, from its listing
What our sizing says 59 to 60 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 trawler gets full thrust to 59 ft, and a sailboat to 60 ft. The maker gives one range for every boat.

The table below tries the Sleipner SXE100 eVision 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 where it mounts 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 61 ft, just past Sleipner’s own range (39 to 56 ft).

The Sleipner SXE100 eVision 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. Its maker does not name this kind of hull.
Sailboat 49 to 60 ft 61 ft onlyfull thrust to just under 15 knots at 61 ft
Houseboat Not listed. Its maker does not name this kind of hull.
Catamaran Not listed. An external unit bolts to the side of a single hull at the bow or to its transom, and a cat has two narrow hulls with a bridgedeck between them, so there is nowhere forward to hang one.
Trawler 49 to 59 ft 60 to 61 ftfull thrust to just under 15 knots at 61 ft
Motor yacht 49 to 59 ft 60 to 61 ftfull thrust to just under 15 knots at 61 ft
Bass & flats Not listed. This site does not list it for this kind of boat.
Wake & ski boats Not listed. This site does not list it for this kind of boat.
Express cruiser No length. More thrust than the boat needs.
Center console Not listed. This site does not list it for this kind of boat.

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 three 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

These totals are our estimate of a yard job: the unit’s price, plus a yard’s hours at $160 to $180 an hour, plus the batteries, cable and charger, plus the other parts the box does not hold. A Lifting the boat out of the water on a travel lift or a trailer so work can be done below the waterline. It is billed separately from the job itself. adds $970 to $2,940 at these lengths, with 5 to 7 days out of the water, worked from eight yards’ own rate cards. The hours come from what owners and yards report. Your own yard will have its own opinion. The cost page builds the same figures line by line.

The Sleipner SXE100 eVision fitted by a yard, from the shortest to the longest boat it is sized for. Our estimate.
Boat length The unit Yard labor Haul-out Batteries, cable, charger Other parts Total
49 ft $12,250 $1,280 to $3,6008 to 20 hours $970 to $2,360 $961 to $1,037 $307 to $642 $15,768 to $19,889
55 ft $12,250 $1,280 to $3,6008 to 20 hours $1,080 to $2,650 $961 to $1,037 $307 to $642 $15,878 to $20,179
61 ft $12,250 $1,280 to $3,6008 to 20 hours $1,180 to $2,940 $961 to $1,037 $307 to $642 $15,978 to $20,469

How the batteries, cable and charger add up. We price a battery bank close to the thruster, as the makers recommend, with 10 to 20 ft of cable out and back: red for the positive, black for the negative, cut to length. The low end is the cheapest battery that meets the figure and the shorter run; the high end is a sealed (AGM) battery and the longer run. The charger is a NOCO GEN5X2 two-bank shore charger.

Batteries and lugs are priced at Fisheries Supply and the cable and charger at Defender, read 12 October 2026.

  • At 24 V: two 12 V batteries in series, at least 551 CCA each (Sleipner’s minimum), $720 for both; Sleipner’s cable table gives 1/0 AWG: $95 to $171 for the red and black cable and the lugs; a GEN5X2 charger, $146.

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 Sleipner’s SE80 to SE150 installation guide, document 2687 rev 30, 2025, read 30 September 2026. That manual is written for the tunnel units. An external unit has no tunnel to buy.

In the box
The gasket, bolts and anode come with the unit. The SEP guides call the power controller "the included PPC unit".
Bought separately
The ANL fuse and a main switch ("must include"), the control panel with its own guide, the panel cable and the battery cable.
Charging
The word "charging" is not in any of the Sleipner guides we read. The battery is sized by cold cranking amps, and a battery near the thruster is suggested. How it gets charged is left to you and your installer.

The manual’s words, page 19: “For installations on large vessels with bow and stern thrusters or catamarans a dedicated battery for each thruster should be considered.”

The “other parts” line in the estimate above is the priced parts below, $307 to $642 at Fisheries Supply’s prices on 30 September 2026. The batteries, cable and charger have a line of their own.

Parts the Sleipner SXE100 eVision’s box leaves to you, from the makers’ manuals read 30 September 2026. “What to ask for” is Sleipner’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. SM8960G single joystick, SM8950G touch panel $219–$374Side-Power touch panel and single joystick, VETUS push-button panel, Lewmar single joystick, 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. Side-Power ANL fuse, 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. SMANLHOLD (SMANLHOLD-C with a cover) $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. Side-Power manual main switch, 350 or 600 A, or the automatic AMS $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. Sleipner names none $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. Sleipner 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. Sleipner 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. Sleipner names none $146–$305NOCO GEN5X2 shore charger, Victron Orion-Tr Smart DC-DC charger, Blue Sea ML-ACR charging relay, at Fisheries Supply.

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 Sleipner SXE100 eVision, every published figure the site holds, with where each came from.
Thrust and motor
Thrust 220 lb (100 kgf) As printed: "SXE100 21V 31V 100kg / 220 lbs (21V) 5.6 kW / 7.6 hp" - Sleipner SXE installation manual 8058 rev 1 (2025), Product specifications MC_0996; the product page prints 100kg at both 24V and 21V
Thrust under load220 lb at 21 V
Motor5.6 kW
Voltage24 V
Fitting
TypeExternal, fixed mount
End of the boatStern
Tunnel diameter185 mm
What it does to the hullA small hole in the transom for the power and control cables
Haul-out to fit itYes
Weight25 kg (55 lb)Sleipner’s product page
Maker’s boat length39 to 56 ft
Price and ordering
Price $12,250 full kit, a dealer's price, imtra.com, 14 October 2026
Part number SXE100/185T-24V24 V, 24 V DC (nominal 21 V DC)
Documents
Manual Installation manualon the maker's product page
Warranty Sleipner gives 2 years for leisure use and 1 for commercial use. It transfers to the next owner, and it starts no later than 18 months after the boat's first launch. Sleipner's warranty statement, effective 1 April 2022
The site’s reviewSleipner (Side-Power) 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 Sleipner SXE100 eVision’s draw, cable, fuse, battery and run limit, as the maker publishes them.
Voltage Draw Maker’s cable Fuse Battery Run limit
24 V 290 Anominal draw 1/0 AWG for up to 22 ft of cable counted out and back. Longer runs take heavier cableinstallation guide ANL 250installation guide 290 CCA DIN minimumSleipner installation guide, SXE100 eVision external, document 8058 rev 1 (2025) continuous at 22 C ambient, typically limited by battery capacityproduct page, "Motor cycle duty"

What holds up and what to weigh

Each point names the fact it rests on.

What holds up

  • Sleipner also prints a second, lower thrust figure for when the battery sags under load: 220 lb at 21 V.The maker's published rating

What to weigh

  • The boat comes out of the water to fit it: it needs a small hole in the transom for the power and control cables.The mounting style

What the manual and listings say

This is the note we keep on the Sleipner SXE100 eVision, written from the maker’s manual, its product pages and the dealer’s listing.

In the box: A brushless eVision motor on S-Link control. The panel, fuse and main switch are bought.

Our note

A stern thruster for boats with twin stern drives, built on the SX100 with Sleipner's brushless eVision motor. The sealed unit bolts to the outside of the transom, delivered assembled and wired, and needs only a small hole for its cables. The manual rates it continuous at full thrust at 22 C, limited by the batteries.

Videos

One of Sleipner’s own videos, from its YouTube channel: an owner’s Sealine 35 with the compact external units, on the water. 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.

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

Other sizes and close alternatives

These are Sleipner’s nearest sizes by thrust, in any of its lines.

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.