Maxxfan Deluxe 7500K
Plan a protected supply circuit for your Maxxfan Deluxe 7500K. See the positive and return connections, then enter your roof-to-panel cable length in the editable example.
Open this example as a new project. Use your own parts and cable lengths to make the plan yours.
The example uses the manual's minimum supply requirement as a planning allowance. The displayed fuse is a preliminary cable-protection result; the manual does not specify an external branch-fuse rating.
3 m one way
12 V system
Sized against ABYC E-11. The design current is a supply allowance based on the manual's minimum service requirement, not a measured operating draw or startup surge. The length is one way; voltage drop includes an equal-length return.
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.
Wiring diagram
Open this example in Crimp to use your own parts and cable lengths. Review the assumptions and installation notes as you adapt the circuit.
Installation notes
Guidance for this model, with sources linked beside the relevant advice.
Verified against the manufacturer's documentation (rev. 11E90001K — 11-2017), checked 2026-09-11. Manufacturer documentation →
This is the Maxxfan Deluxe 7500K, a reversible roof fan with a powered lid and remote control. The Airxcel installation and operating guide includes this model. Dome, Mini, Compact and international KI variants have their own instructions; their fuse or voltage specifications should not be substituted for the 7500K.
One DC pair supplies the fan and lid mechanism. With vehicle power disconnected, connect the supplied leads using the provided insulated connectors. The tagged black (+) lead goes to positive; do not infer polarity from black insulation alone. The manual requires stranded cable and a circuit capable of supplying at least 5 A. Check available capacity if sharing a branch.
The protected path is house battery or distribution positive, branch fuse, fan positive, then the fan return back to the negative system. The simple starter draws this directly from a placeholder house bank. In an RV or campervan with a distribution panel, replace that source with the real branch and include the upstream feed when reviewing voltage drop.
Wire size depends on current, run length, voltage drop and installation conditions. Crimp uses a 5 A supply design allowance, following the manual's minimum service requirement. It is not a measured high-speed draw. The reviewed manual does not specify startup surge, so this catalog entry does not invent one.
The reference uses 3.048 m (10 ft) each way, shown as 3 m in the metric overview. The calculation includes positive and return conductors. Open the starter and enter the actual roof-to-panel route; do not use the total circuit length as the one-way input. Low-speed operation may use less power, but should not determine the supply cable for all fan settings.
No. The manual specifies supply capability and describes an onboard self-resetting fuse, but does not prescribe an external branch-fuse rating. The fuse displayed here is the engine's preliminary cable-protection example. Its current rating alone does not establish startup performance. Confirm the exact fuse, holder, cable and your unit's requirements.
The onboard device does not protect the full upstream cable. Use a protected distribution branch, such as one planned with the Blue Sea 5026. For a lithium bank, the fuse checker separates current rating from fault-interruption evidence. Read the methodology for the engine's sizing assumptions.
The campervan and RV wiring examples put this 7500K on a fused distribution branch, with the upstream house feed and solar or alternator charging included.
Build it out
Add Maxxfan Deluxe 7500K to your diagram, then connect your batteries, chargers and loads. Crimp calculates cable sizes and checks the connections as you draw.
Every cable you draw there is sized against ABYC E-11, from the same tables as the reference on this page.
Technical reference
Check the model, ratings and connection points against your own unit before choosing installation hardware.
Check stud sizes, fuse type, run length and how warm the space gets against the gear you actually have before you order.
Catalog connection points, current direction and planning limits. Check the manufacturer's pinout and connector ratings before installation.
+
pos
positive · input
−
neg
negative · input
Method & provenance
Manufacturer specifications describe the equipment. Crimp calculates cable results from the circuit and assumptions you enter.
From the maker
Manufacturer, model, ratings and which terminal does what come from the catalog. A newer revision, or the nameplate on the unit in your hand, can say something different — when it does, the nameplate wins.
ABYC E-11
Sized against ABYC E-11. Boats built to UK or EU rules answer to ISO 13297 — check these figures against it before you build. The run length and the current above are what drive the result. Crimp doesn't know how warm your space gets; draw the cable inside an engine-bay zone on the canvas and it sizes for the heat.
Next step
Open this example as a new project. Add your equipment and cable lengths, then review the sizing and checks for your setup.