Originally Posted by Tom48
First I would never run the thing for more than a couple minutes, without a battery in the circuit. The battery evens the load, improves the quality of the current from your converter/charger, which is often fairly ROUGH DC current without the battery as a buffer. Next look at the specs for your converter, you can usually find it on line. Some fans are temp activated, some are current flow activated and I guess some even just run if there is current draw. Decide if what you are seeing is normal or actually a problem.
I agree with the others Re: the FRIG always draws a small current to the digital controls. Most other things like the CO detector and propane detectors use some, but very little power. IF you are worried, check the draw fuse circuit by circuit.
If the refrig is turned off at its control panel, there should be no current draw.
Removing each 12v fuse one at a time to look for the current draw will not (may not) find the device still drawing current. Manufacturers use inline fuses and circuit breakers for some current drawing devices. You may have that situation - just be aware of that.
For example, when our TT factory battery disconnect is shut off, the front leveling jacks still operate. (Dealers wanted this feature so they could operate the jacks without having to get the keys to open the trailer to enable the battery cutoff switch - to aid in moving the trailer in the storage areas).