Running trailer from tow vehicle inverter

carringb wrote:

Boon Docker wrote:
Not sure how you would get a closed loop when using the inverter in the tow vehicle.
You are not using the trailer battery, you are using the tow vehicle battery.

If you are hooked up to the 7-way plug, the converter will attempt to charge both the trailer and Tow Vehicle. I'm not aware of any OEM that include a diode to the trailer charge circuit. If you're disconnected from the 7-way, it's not an issue.

Would not hurt a thing.
Chances are the vehicles charging circuit would be above the voltage of the converter. Thus. the converter will not be putting out much. If the vehicles voltage level is below the converters then the conv will charge everything - again, no issue.
It's also no different than plugging in the RV while the vehicle is connected and running.

Either way, it isn't a short and wont hurt anything at all.

Years ago I did exactly as the OP describes to power my 2 way fridge and had no problems.