Don't be fearful that the amp rating of the RV exceeds the rating of the outlet. Your home circuit breaker will kick off if you try to draw too much power. Your 15 amp outlet will power the converter/charger, the refrigerator, a few lights and a fan. Just don't try the A/C, electric water heater, or other high draw items. Just be aware of what else the home outlet might be powering so you don't go over 15 amps total.
Bob & Donna
'98 Gulf Stream Sun Voyager DP being pushed by a '00 Beetle TDI