You can get a cheap battery Tender at Walmart for $18 that you can leave plugged in all of the time without boiling your battery, or you can get a heavy duty knife switch for $5 that will disconnect the battery from the system. Your battery has to be accessible for that to work. You can also buy a 3 or 4 stage converter / battery charger and set it up to charge the house batteries as well as the chassis battery. with a 3 or 4 stage charger your batteries will not boil and the plates will de-sulphate so that your batteries will last longer. Not cheap about $350. Thats what I did. I leave my Motor Home plugged into shore power 24/7 except when traveling or boondocking.
2006 Four Winds Hurricane 31D, Steer Safe, CHF, 50 Amp Conversion, 3000 Watt Inverter, Toad is a 2007 Jeep Liberty Sport. Blue Ox Aladdin Tow Bar, Apollo Braking System