If you do use your batteries a lot (dry camping) you will NEED a dedicated 3 stage battery charger and a generator to replace the current you draw when the generator is not running.
Your house power center is designed to provide 110 volt AC and 12 volt DC to power the appliances in your camper. It also will charge your batteries but will do so in stages designed to maximize the life of the battery (IE SLOWLY).
While you can pull out 50% of the batteries maximum possible amps in a few short hours; it can take DAYS to replace using the house power center alone. The bigger the bank in amps; the longer the process takes since the stages shift as a percentage of battery capacity (whether measured by voltage; specific gravity; or internal computer).
There is a fixed amount of amp output for each stage of charge. Having a 500 amp hour bank will take 10 times longer to recharge than a 50 amp hour bank.
Running the generator DOES NOT HELP HERE. It uses the SAME power center as shore power. DAYS to top off your bank...
It is far better to plug a dedicated Deep Cycle Battery Charger into an outlet on the generator and hook THAT to your batteries than use the on board power center. Just make sure if you are using a computer to monitor your battery status the PLUS clamp/terminal is located where the red wires split to go to your batteries + terminals (so all batteries are charged) and the Negative clamp/terminal is on the HOUSE SIDE of the Ammeter Shunt so the computer notes the increased amps into the batteries.
Lou and Laura with Bella - German Short Hair Pointer
2008 GMC Sierra 2500HD Crewcab SB Allison Duramax
2010 Flagstaff 8526RLWS - Superglide 3300
HAM CALLSIGN - KC3FFW