SE80/185T (24V)
Sleipner SE80 Bow Thruster 24V wiring diagram
24 V SE80 on/off thruster, 4.4 kW / 6 hp. Manual revision 30 lists 280 A nominal current and a 250 A ANL fuse, with S2 operation for 2–3 minutes at 20°C. Rated thrust depends on loaded voltage at the motor.
- Compatible systems
- 24 V
- Continuous draw
- 280 A
- Surge current
- 400 A
Wiring diagram
How the SE80 24V is wired.
Open this example in Crimp to use your own parts and cable lengths. Review the assumptions and installation notes as you adapt the circuit.
Cable sizing for this example
Use the diagram as a starting point for your installation. Replace the example equipment and cable lengths with your own, and check the connections against your exact model's instructions.
3 m one way
24 V system
- Wire
- 95 mm² · 3/0 AWG
- Example fuse
- 350 A
- Design current
- 280 A
- Voltage drop
- 1.3%
Sized against ABYC E-11. The design current is the part's continuous draw. The length is one way; voltage drop includes an equal-length return.
Run-length and manufacturer assumptions
The editable example uses 3.048 m (10 ft) runs unless a shorter run is stated. Metric overviews round these to 3 m. Adapt the parts and lengths to your installation before choosing cable and protection.
Supporting parts
- 6.1 m total of 95 mm² (3/0 AWG) marine cable
- Terminations for 95 mm² cable, matched to the equipment's screw terminals, leads or studs
- 350 A fuse and holder on the positive run
- Heat-shrink, strain relief and terminal boots sized to the cable
Check stud sizes, fuse type, run length and how warm the space gets against the gear you actually have before you order.
Installation notes
Before you install.
Open a question for model-specific guidance and sources.
Verified against the manufacturer's documentation (rev. 2687 revision 30 — 2025), checked 2026-10-01. Manufacturer documentation →
Read the 24 V SE80 figures
Installation manual 2687 revision 30, page 5, lists 4.4 kW / 6 hp for the SE80. Its 80 kg thrust figure is measured at 21 V at the operating motor; at 24 V the table lists 96 kg. Battery resting voltage is therefore not a useful substitute for the loaded voltage at the thruster.
Page 20 lists 280 A nominal current and a 250 A ANL fuse for the 24 V 80/185T. Those are different quantities, consistent with a short-duty motor and time-dependent protection. Do not replace the specified fuse solely because a general continuous-load calculator returns a larger number.
Include isolation and control wiring
The power circuit needs a positive main isolator, specified protection, suitable battery supply and a full negative return. The simplified canvas omits the control panel and control loom. Follow the manual's connection diagrams for the standard SE on/off model; the SEP proportional version and ignition-protected versions have different equipment requirements.
Keep the main isolation reachable so that a control fault does not leave the motor running. Protect terminals against accidental shorting, support the heavy cables independently and use the model's documented fastening instructions.
Size from round-trip length
The page 20 chart uses total positive-plus-negative cable length. For the 24 V SE80 at less than 7 m it recommends 35 mm²; at 7–14 m the minimum remains 35 mm² but the recommended size becomes 50 mm². Check the full row for longer runs and allow for voltage drop in every joint and switch.
The same chart specifies minimum battery CCA in separate DIN, SAE and EN scales. Do not treat those scales as interchangeable or translate Ah directly into motor-start capability. For lithium, verify BMS current and transient capability explicitly. The catalog's surge is a planning estimate, not a separately established manufacturer peak.
Respect motor duty and tunnel requirements
Page 5 specifies S2 operation of 2–3 minutes at 20°C ambient. Plan manoeuvres and cooling accordingly. The tunnel position, propeller clearance and mechanical installation in the manual are prerequisites for rated thrust; adding cable area cannot correct a poor tunnel installation.
Before service, isolate all supplies and keep people clear of the propellers. Commission with the vessel afloat, verifying direction, stop response and loaded voltage. Inspect the anodes, propellers, cables and isolation arrangement as part of normal maintenance.
Fit check
Connect it to the rest of your system.
Describe your setup to draft a system with SE80/185T (24V) connected. Review the selected parts and cable lengths, then edit the diagram in Crimp.
The model only picks parts and draws the connections. Every wire size and fuse rating still comes from Crimp's own sizing, never from the model.
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Technical reference
Specifications and terminal map.
Check the model, ratings and connection points against your own unit before choosing installation hardware.
Catalog specification
24 V SE80 on/off thruster, 4.4 kW / 6 hp. Manual revision 30 lists 280 A nominal current and a 250 A ANL fuse, with S2 operation for 2–3 minutes at 20°C. Rated thrust depends on loaded voltage at the motor.
- Compatible systems
- 24 V
- Continuous draw
- 280 A
- Surge current
- 400 A
Terminal map
Catalog connection points, current direction and planning limits. Check the manufacturer's pinout and connector ratings before installation.
+
positive · input
−
negative · input
Sources and sizing method
Equipment specifications. Model details, ratings and terminal roles come from the catalog. Check your unit’s label and current manufacturer documentation for its exact revision.
Example sizing. Sized against ABYC E-11. Boats built to UK or EU rules answer to ISO 13297 — check these figures against it before you build. Results use the example current and run length shown above. Set your actual equipment, lengths and installation conditions in Crimp before choosing hardware.
Read how the sizing worksNext step
Plan your installation with SE80 24V.
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