Maxxfan Deluxe 7500K
Maxxfan Deluxe 7500K: 10-speed reversible 12 V roof fan with a powered lid and rain shield. The 5 A planning allowance follows the manual's minimum supply requirement; it is not a measured speed or surge rating.
The reference run on this page is 3 m one way, sized against ABYC E-11. Your own run will differ, and the canvas sizes that one.
Wiring diagram
The drawing shows where the feed, the return and the fuse land on this part. The starter uses the same reference circuit and sizing assumptions. Read the installation notes for manufacturer requirements before adapting the runs.
Build it out
Open the canvas with Maxxfan Deluxe 7500K already placed, then add your batteries, charging, distribution and loads around it.
Every cable you draw there is sized against ABYC E-11, from the same tables as the reference on this page.
Technical reference
The catalog facts for this part, which terminal takes what, and the hardware you'll want around it. Check the nameplate on your own unit before you order.
3 m reference run
12 V system
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 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 shared starter uses 3.048 m (10 ft) runs unless a shorter run is stated. These are example assumptions for you to adapt to your own installation.
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
Field notes
What we've read and heard about installing this exact part. These are notes, kept apart from the numbers Crimp works out.
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.
Verified against the manufacturer's documentation (rev. 11E90001K — 11-2017), checked 2026-09-11. Manufacturer documentation →
Method & provenance
The manufacturer publishes some of these numbers and Crimp works out the rest. It's worth knowing which is which.
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
It lands on the canvas already placed. Add what it connects to, and every run gets its wire and fuse as you draw.