We have an inverter in our ambulance that provides power to just two outlets; one to recharge our high tech heart monitor/defibrillator, and the other is available if needed to run other 110vac appliances. In practice, just the monitor/defib unit is used on the inverter. The inverter is pretty much separate from all the other wiring in the rig which is all standard 12vdc stuff. It's not terribly different from an RV system in many respects. And there is no transfer switch.
As already recommended, while your choice of inverter is way to small to run all the outlets in the RV, it can provide adequate power to a single new outlet.
Be sure to use adequate size wire from the battery or distribution point to the inverter. The Power & Ground Cable chart on this page may be helpful:
http://www.the12volt.com/info/recwirsz.asp
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'11 Cougar 326MKS loaded with mods
'12 Ford F250 SuperCab 6.7 PowerStroke Diesel
Amateur Radio: KD2IAT (146.520)
GMRS: WQPG808 (462.675 TPL 141.3)