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Sleipner · retractable thruster · bow or stern
Sleipner SRL100: specs, price and the boats it fits
It gives 256 lb (116 kgf) of push. Sleipner sells it for boats of 39 to 56 ft. It runs on 12 V or 24 V.
- Haul-out to install
- DIY 2 of 5: wiring prep only
- 2-year warranty
Not sold in the US right now. No US store or distributor lists the Sleipner SRL100: we checked Imtra’s US catalog (the Sleipner distributor), Defender and Fisheries Supply on 15 October 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 Sleipner (Side-Power) review that have a US price.
Quick stats
- Thrust 256 lb 116 kgf, Sleipner's rating
- Boat length 39 to 56 ft Sleipner's own range
- Price per lb of thrust Not worked out It needs a price and a thrust figure
- Voltage 12 V or 24 V As sold
- Battery at 12 V 713 CCA Two batteries, near the thruster
- Run limit Not published Ask the maker before long use
- To install it Haul-out The boat comes out of the water
- Anodes $42.30 A change, at Defender
About the Sleipner SRL100
The SRL100 is the stronger low-profile on/off retractable on the 185 mm drive: 256 lb of push for boats of about 39 to 56 ft, at 12 or 24 V.
There is no published US price; ask a Sleipner dealer for a quote that includes the housing. At 12 V it draws 740 A, which calls for two strong batteries side by side. At 24 V the manual gives 340 A, where the product page says 380. See the specs.
Read more
Expect 2 to 3 minutes of running at full thrust. The motor rides on the moving casing, so the drive stays aligned as it deploys. Sleipner’s warranty is two years.
Installers will find the wiring figures and dimensions further down. For the rest of Sleipner’s line, read the Sleipner (Side-Power) review.
Sleipner sold its thrusters under the Side-Power name until 2021, and many dealers and owners still call them that. It is the same company and the same thrusters.
Where this summary comes from (4 sources, read 15 October 2026)
Will the Sleipner SRL100 steer your boat?
61 FT TRAWLER · BOW · 15 KT WIND
Every knot figure here is wind speed, not boat speed or current.
On a 61 ft trawler the Sleipner SRL100 (256 lb) steers her in a 15 knot breeze. Her bow needs about 248 lb from a retractable to steer her in a 15 knot breeze.
The finder leaves it off her list. We found no US store that sells it, and the finder lists only units you can buy here.
The Sleipner SRL100 on a trawler, by length
- 25 ft37 kt
- 30 ft31 kt
- 35 ft26 kt
- 40 ft23 kt
- 45 ft21 kt
- 50 ft19 kt
- 55 ft17 kt
- 60 ft15 kt
- 65 ft14 kt
- 70 ft13 kt
- 75 ft12 kt
- 80 ft12 kt
Outlined: the finder does not list it at that length (under 13 kt, far more than she needs, or outside Sleipner’s own length range).
- Under 10 kt
- 10 to 15 kt
- 15 to 20 kt: the sweet spot
- Over 20 kt: more than she needs
Prices are the low end of the installed total, from our estimate. For your own boat, drive and installer, the finder prices each unit.
Is it right for your boat?
Every kind of boat it fits, by length
| Boat | Full thrust at 15 knots | Still 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 | 45 to 61 ft | None |
| Houseboat | 36 to 48 ft | 49 to 54 ftfull thrust to about 13 knots at 54 ft |
| Catamaran | 51 to 61 ft | None |
| Trawler | 45 to 61 ft | None |
| Motor yacht | 45 to 61 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 | 57 to 61 ft | None |
| Center console | No length. More thrust than the boat needs. | |
The Sleipner SRL100 against each kind of boat, in a 15 knot wind. Our sizing, from the finder’s own rules.
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 steers her in a 13 or 14 knot wind, within 15 percent of the 15 knot breeze this site sizes for. On a boat shorter than the first column’s shortest length, the unit is more than the boat needs.
How we size it
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 48 ft, and a sailboat to 61 ft. The maker gives one range for every boat.
The table tries the Sleipner SRL100 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 36 ft and up to 61 ft, just past Sleipner’s own range (39 to 56 ft).
It is sized for six kinds of boat here. For your own boat, the finder gives an answer that also counts your drive and who does the installing. The compare page sets this unit beside others.
What it costs installed
No US dollar price is published for the Sleipner SRL100, 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.
DIY breakdown
DIY levels
- Level 5: Owner install. No yard, no electrician.
- Level 4: You install 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 installs 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 hours Yard: 40 to 88 hours Electrician: 2 to 4 hours Plus a haul-out.
Your part needs:Heavy battery cableCrimping big lugs
Every step, and who does it
- Cut the hull and fit the housing and mechanism Yard 40 to 88 hours 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.
- Mount the battery box, switch and fuse holder; run and secure the cables You 4 to 16 hours 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 hours Our estimate. Nobody publishes a time for the final connections and test on their own.
A qualified marine electrician should make the final connections and test them before first use. Hours are labor only.
Related videos
Two of Sleipner’s own videos, from its YouTube channel. They play only when you tap. A maker’s video is its pitch, so take any claim back to the figures on this page.
Know before you buy
What sets this model apart, what it costs to keep, and what to weigh.
Price per pound of thrust
There is no US price to divide by its thrust.
Controls
Gasket, bolts and anode with the unit. The panel, its cable, the fuse and main switch are bought.
Anodes
$42.30 a change- Anode (SM71190A): $14.40 at Defender, $18.01 at Fisheries Supply, and it takes two.
- Anode on the retract mechanism (zinc) (SM61180): $13.50 at Defender, $16.88 at Fisheries Supply.
They sit below the waterline, so a change means a haul-out or a diver.
Service and 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.
See Sleipner’s warranty Sleipner's warranty statement, effective 1 April 2022.Special mentions
Battery: at 12 V it wants two batteries of 713 CCA or more, Sleipner's figure. The cheapest that meets it is the Optima BlueTop SC27DM Group 27 AGM, $359.99. Check your own bank.
Charger: a NOCO GEN5X2 two-bank shore charger, $146.41. It is the one our estimate prices.
Sleipner sells it for either end, so it can go at the bow or the stern.
Dealer prices at Fisheries Supply, read 26 October 2026.What to weigh
The boat comes out of the water to install it: it needs a large hull opening below the waterline.
No US dollar price is published for it, so we can work out no installed cost.
At 12 V it draws 740 A, so the battery cable is heavy and the battery sits close to it.
Parts for the Sleipner SRL100
See the Sleipner SRL100 manualThe US dealer number comes first, then Sleipner’s own. Prices are each dealer’s on the day shown, before shipping and tax. Check the plate on your motor before you order: some parts change with the tunnel size, the voltage or the year.
For the install what the box leaves you to buy
The manual button above opens it on the maker's product page. It has the hull, wiring and fuse figures for this model.
From Sleipner’s SR LV 80 and 100 installation manual, document 2881 rev 20, 2026, read 16 October 2026.
- In the box
- The manual prints no box list. It mentions the M10 hatch bolts and a red spacer block, and says some models arrive with the motor already on the housing. It does not say whether the SRF flange is in the box.
- Bought separately
- The battery, the ANL fuse, a main switch (manual or Sleipner's automatic one), the battery cable, the control panel, and the S-Link cables with their T-connectors and end terminators.
- 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.
In Sleipner’s words, from its SE80 to SE150 installation guide, document 2687 rev 30, page 19: “For installations on large vessels with bow and stern thrusters or catamarans a dedicated battery for each thruster should be considered.”
A yard job adds these parts on top of the unit: $336 to $815 for the priced ones, at Fisheries Supply’s prices on 30 September 2026 and 26 October 2026, plus the batteries, cable and charger. The cost page has what every maker says about each part.
Outside the hull replacement parts in the water
Anode (takes two)
The metal that wears away in the water so the drive does not. Sleipner calls it “Anode, aluminium SE60/80/100”.
Anode on the retract mechanism (zinc)
The metal that wears away in the water so the drive does not. Sleipner calls it “Anode, zinc 4/6 Hp up to 1999”. It fits the 24V size on this page.
Sleipner's name for it says "4/6 Hp up to 1999", but its parts lists show it in the retract mechanism of these models (SM900460 6 1180 on the SRV/SRL pages).
Tunnel anode rod
The metal that wears away in the water so the drive does not. Sleipner calls it “Anode rod for SRV thrusters”.
Sleipner lists it for the retract assembly that this model's own page names (8 0650, 8 0651, 13 0650, 13 0652, 13 0653, 13 0654 or 20 0651); on some model pages it is listed directly. Sleipner's SM number for it is SM906006. The SRL170 and SRV210 are not on its list.
Inside the boat replacement parts on board
Lift actuator kit, 12 V
Sleipner calls it “Actuator kit 12v Retract 185-250mm”. It fits the 12V size on this page.
Listed on each of these models' pages.
Lift actuator kit, 24 V
Sleipner calls it “Actuator kit 24 v Retract 185-250mm”. It fits the 24V size on this page.
Listed on each of these models' pages.
Retract control unit
The electronics that run the motor when you press the panel. Sleipner calls it “Electronic Control Unit SRV”.
Listed through the retract assemblies 13 0650, 13 0652, 13 0653 and 20 0651, and directly in the kits on the SRL100 pages (as SM101206 150000).
Main fuse (325 A)
The main fuse at the battery, in the rating the maker gives. Sleipner calls it “Recommended fuse A”. It fits the 24V size on this page.
The rating Sleipner prints on the own page of each model listed here; read on each page.
Main fuse (500 A)
The main fuse at the battery, in the rating the maker gives. Sleipner calls it “Recommended fuse A”. It fits the 12V size on this page.
The rating Sleipner prints on the own page of each model listed here; read on each page.
Replacement motor
The electric motor that turns the propeller. Sleipner calls it “Complete electric motor”. It fits the 12V size on this page.
Replacement motor
The electric motor that turns the propeller. Sleipner calls it “Complete electric motor”. It fits the 24V size on this page.
The SRL100 24 V page lists this number where the SRV100 and SRLP100 24 V pages list 8 0117 24. Confirm with your serial number.
No part matches. Try the number without spaces, or the part’s name.
Spare part numbers come from Sleipner’s parts pages and manuals. A dealer may sell a part we have not priced. Search for the number.
Other sizes and close alternatives
- Size down Sleipner SRL80 212 lb
- Size up Sleipner SRL130 353 lb
- Same thrust Sleipner SRV100 256 lb · $11,750
- Same thrust Sleipner SRVP100 PRO 256 lb · $13,070
- Same thrust Sleipner SR100 256 lb
- Same thrust Sleipner SRLP100 PRO 256 lb
- Same thrust Sleipner SRP100 PRO 256 lb
- Other maker Max Power VIP 150 three sizes, 212 to 254 lb · $8,598 to $8,698
- Other maker Quick BTR 185 six sizes, 143 to 231 lb · $12,436 to $17,991
- Other maker Lewmar RT185 MX Gen 2 214 lb · $8,687 to $9,034
The other makers listed are the nearest match each makes, of the same style and for the same end, within a quarter of its thrust. The compare page lists every model, and the thruster index lists every model with a page here.
For the yard and the installer
Every published figure, with its source.
Full spec sheet
| Thrust and motor | |
|---|---|
| Thrust | 256 lb (116 kgf) As printed: at 12V: 116kg; at 10.5V (nominal): 100kg |
| Thrust under load | 220 lb at 10.5 V |
| Motor | 6.3 kW |
| Voltage | 12 V or 24 V |
| Run limit | Not published |
| Installation | |
| Type | Retractable, drops down |
| End of the boat | Bow or stern |
| Tunnel diameter | 185 mm |
| What it does to the hull | Large hull opening below the waterline |
| Haul-out to install it | Yes |
| Maker’s boat length | 39 to 56 ft |
| Price and ordering | |
| Price | No US price published |
| Part number | SRL100/185T-12V12 V, 12 V DC (nominal 10.5 V DC) SRL100/185T-24V24 V, 24 V DC (nominal 21 V DC) |
| Documents | |
| Manual | Installation manualon the maker's product page |
| The site’s review | Sleipner (Side-Power) review |
Every published figure the site holds for the Sleipner SRL100, with where each came from.
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 |
|---|---|---|---|---|---|
| 12 V | 740 Anominal draw | 3/0 AWG for up to 22 ft of cable counted out and back. Longer runs take heavier cableinstallation guide | ANL 500installation guide | 750 CCA DIN minimumSleipner installation guide, SRL and SRV 80 and 100, document 2881 rev 20 (2026) | Not published |
| 24 V | 340 Anominal draw | 1/0 AWG for up to 22 ft of cable counted out and back. Longer runs take heavier cableinstallation guide | ANL 325installation guide | 400 CCA DIN minimumSleipner installation guide, SRL and SRV 80 and 100, document 2881 rev 20 (2026) | Not published |
The Sleipner SRL100’s draw, cable, fuse, battery and run limit, as the maker publishes them.
- At 12 V: size the cable for your run, or check the battery you have.
- At 24 V: size the cable for your run, or check the battery you have.
Our notes from the manual and listings
In the box: Gasket, bolts and anode with the unit. The panel, its cable, the fuse and main switch are bought.
12 V
This retractable lives in a housing let into the hull through a large opening, and drops when used. It is a bigger yard job than a tunnel. It also has a mechanism to keep in order. The low-profile build of the 100 kg retractable, on/off.
24 V
The product page gives 380 A at 24 V; the manual gives 340 A.
Where each point above comes from
- Sleipner sells it for either end, so it can go at the bow or the stern.The maker's listing
- It is sold at 12 V and at 24 V.The maker's and dealers' listings
- Sleipner also prints a second, lower thrust figure for when the battery sags under load: 220 lb at 10.5 V.The maker's published rating
- The boat comes out of the water to install 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 installed cost.The maker and the dealers the database reads
Not sure this is the one? The thruster finder asks about your boat and prices every unit that fits.