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Dometic CRX65 wiring diagram
Connect the Dometic CRX65 fridge to a protected 12 V or 24 V DC supply. Find the power wires, voltage-specific fuse and ventilation requirements before planning your cabinet and cable route.
- Compatible systems
- 12 V / 24 V
- Rated power
- 66 W
- Continuous draw
- 5.5 A
Connection essentials
Red +, black −
Use a protected DC supply. AC versions need their separate mains installation instructions.
Match fuse to voltage
Dometic specifies 15 A at 12 V or 7.5 A at 24 V. Running current is lower.
Let warm air escape
Keep a lower air inlet and upper outlet, with the clearance shown in the cabinet drawing.
Wiring diagram
How the CRX-65 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.
This 12 V example uses Dometic's 15 A supply protection and a short 1 m run with 6 mm² cable. Check the manual's voltage-specific cable graph for your route. At 24 V, the specified protection is 7.5 A. Running current and the fuse rating describe different things. Manufacturer installation manual
Edit this wiring exampleFridge supply sizing for this 12 V example
This is the fridge’s DC branch from a fused distribution panel. It uses Dometic’s 12 V protection; use the separate 24 V instructions if your supply is 24 V.
1 m one way
12 V system
- Wire
- 6 mm² · 10 AWG
- Example fuse
- 15 A
- Design current
- 5.5 A
- Voltage drop
- 0.3%
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.
This 12 V example uses Dometic's 15 A supply protection and a short 1 m run with 6 mm² cable. Check the manual's voltage-specific cable graph for your route. At 24 V, the specified protection is 7.5 A. Running current and the fuse rating describe different things. Manufacturer installation manual
Supporting parts
- 2 m total of 6 mm² (10 AWG) marine cable
- Terminations for 6 mm² cable, matched to the equipment's screw terminals, leads or studs
- 15 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. 4445103148 \u2014 2021-06-01), checked 2026-10-12. Manufacturer documentation →
Which wires and fuse does it need?
Connect red to positive and black to negative. Dometic specifies a supply protected at 15 A for 12 V or 7.5 A for 24 V, which is different from running current. Use the voltage-specific cable-length graphs on pages 24–25, then check cable ampacity for the installation. The example retains the 12 V protection and uses a short 1 m supply run with 6 mm² cable. Recheck the graph for your actual route.
How much power does the CRX65 use?
The CRX65 column of the CoolMatic CRX manual rates the refrigerator at 5.5 A on 12 V or 2.8 A on 24 V. Check whether the appliance is a DC or ACDC version: mains connection details differ. The drawing represents the DC supply only. Compressor cycling depends on cabinet ventilation, temperature setting and food loading; daily hours are an energy-budget assumption, not a fixed manufacturer consumption guarantee.
Why does it stop when the battery still has charge?
At 12 V the internal monitor cuts out at 10.4 V and restarts at 11.7 V; at 24 V the thresholds are 22.8 V and 24.2 V. These are appliance thresholds, not preferred battery discharge targets. Check voltage at the refrigerator during compressor starting if it cuts out while the battery appears charged.
How much ventilation does it need?
Follow the cabinet diagram with lower cool-air entry, upper hot-air exit and approximately 50 mm rear clearance. Secure the unit and preserve its condenser ventilation and drainage.
What does the wiring example leave out?
Disconnect it before fast charging or work on the supply. The simple two-terminal model omits thermostat control, compressor start behavior, internal undervoltage logic and any AC rectifier. Do not size endurance from the full-load current multiplied by 24 hours unless intentionally testing continuous running.
Source: manufacturer document — cabinet installation pp. 17–19; DC wiring pp. 24–26; CRX65 technical table p. 39 (printed and PDF pages coincide).
Fit check
Connect it to the rest of your system.
Describe your setup to draft a system with CRX-65 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
CoolMatic CRX65 compressor refrigerator, rated 5.5 A at 12 V or 2.8 A at 24 V. Manufacturer DC supply protection is 15 A at 12 V or 7.5 A at 24 V; compressor duty and daily energy depend on installation and use.
- Compatible systems
- 12 V / 24 V
- Rated power
- 66 W
- Continuous draw
- 5.5 A
- Surge current
- 7 A
Terminal map
Red is positive; black is negative. These are the DC supply connections. The displayed current limits are catalog planning values, not the manufacturer's fuse ratings; AC connection and compressor controls are outside this drawing.
+
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 CRX-65.
Open this example as a new project, or add this component to your existing diagram. Use your equipment and cable lengths to review the sizing.
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