Running trailer from tow vehicle inverter

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.

The OP hasn't provided any details at all as to what means he'd use to connect this inverter to the trailer, whether the trailer battery is also connected or not, whether the trailer converter would be on or off, whether he would intend any other 120 vac devices in the trailer to be on or off. Regardless, any system must avoid creating a closed loop.