Well Sir, since not all coaches are wired the same, one of the things that you may want to check is, whether or not, your house, and or, chassis batteries remain being charged if, you keep on shore power but, turn the battery disconnects off. There are some coaches that do, and some that don't. If you're handy with a volt ohm meter, a simple test will tell you what you need to know.
First, unplug the coach from shore power. Turn on some lights, maybe even the furnace for a few minutes. That will drain the house batteries just a tad. Now, with everything shut off in the coach, and the disconnect switches still ON, take a reading of both your house batteries and chassis batteries.
Now, plug your shore power plug in and, take a reading of both sets. This will tell you what kind of charge your converter putting out. Next, turn off your battery disconnect switches and, then take a final reading. This will determine if, your converter is wired in such a manor that, it will continue to charge either the house batteries or, the chassis batteries or, both sets, even though the disconnect switch is off.
There are some folks on here that think that ALL coaches cease battery charging from the converter or, inverter (depending on what you have) if the disconnect switch(s) are turned off. Well, that's just not so. Some do, some don't.
2004 ITASCA HORIZON 36GD, 2011 GMC Sierra 1500 4x4 Toad '08 GL 1800 Gold Wing
Retired-29.5 yrs, SDFD, Ham - KI6OND
Me, Karla and the Sophie character, (mini Schnauzer)