Thanks for the replies..
Yes I have an inverter, because as I said I have a residential fridge. It doesn't run on propane.
All the lights are LED
I have a battery compartment for 6 batteries, but I'm not interested in the additional weight and cost.
I'm slightly interested in an inverter generator, but I don't have an extra $1200 kicking around.
My trucks batteries don't necessarily have the voltage to keep up, once the 6v's are low, after the voltage drop through small guage wire travelling from the front of the truck to operate 3 electric slides and a high demand electric 6 point leveling system.
I DO, however, have this $25 90amp isolator and a brand new 12 volt battery sitting around.
My thought was to always have a fully charged 12v battery to operate only the slides and Ground Control, by separating those systems from the 6v's. Or, for that matter, just to have an extra battery if the 6v's die.
Very similar to a MH that has separate "house" and "starting" battery banks.
I dry camp very little, but I have had to park (with no power) for many hours in the heat with the exhaust fan running, fridge running, and having very little power left to operate the slides.
I just don't know how the progressive charging system of the converter will act being hooked to an isolator charging two separate battery banks.