I really wouldn't worry about an inverter unless your using 110v stuff like coffee makers. If you have a 7 pin trailer plug , it will supply 12v for charging the battery while you drive. If you change out the light
bulbs with led(yes you can keep the same fixtures) you will use very little 12v power. If you are using 110ac at a powered campsite, you could hook up a simple trickle battery charger and wire it into the 12volt line to top up the battery or add a solar
panel(there is a 110vac outlet in the fridge
The main thing is think light
, everything you put into one of these animals adds up on the weight
. I tow with a Subaru outback.