Dealer gave good advice too a point. If you just want to charge the batteries or run the fridge you should be ok, but most outlets in a home are wired on a 15amp breaker and #14 wire. This will not run the A/C, or if it does, not for long, and you hope the breaker trips before the wire gets to hot. A 15,000 A/C needs to be on a 20 amp circuit which requires #12 wire also dependent upon the length of wire. One thing us RV owners should consider is adding an RV box for home use because one day, sooner than later, you will need to power the RV at home. Be safe.