The WFCO would likely go into boost mode if it was located at/on the battery. Not 10 ft or more from the battery with #6-8 wire in between.
What happens is the instant power is applied the voltage at it's own terminals jumps past the 13.2V cut off and sets to normal 13.6 mode.
The way to correct this is to have a small wire from the battery to the converter circuitry to "sense" the actual battery voltage. This costs more money of course and can have it's down side because of this:--You would have to make sure all connections for the 12V things come from the battery only. This is because voltage at the converter could be 16-17 volts allowing for the drop with the small wiring in most rv's. This could be damage or death for many things in the RV so they build the WFCO for "average" use.
As has been said, If you spend most of your time at a power post don't worry about it, it works ok. If you boon dock a lot with a generator update the converter with a PD or like unit.
