An inverter's jusrt a waste of power for a little trailer. That's just for a big family RV when people want to run all kinds of stuff like 110 volt razors, cell chargers, curling irons, whatever off the battery. It draws a whack of power for that little convenience.
All a little trailer needs is a deep cycle battery and means of charging it. In my converted Cargo I have a generator and shore power plug (when that's available) for running things like microwave, A/C, toaster, and a smart charger for the battery. Everything else is 12 volts.
The smart charger doesn't overcharge, it tapers off as the battery approaches full charge and it doesn't backfeed when 110 is off so it can stay in circuit, it'll just automatically charge the battery when it needs it and when 110 is live. As well I have solar cells for charging the 12. volt battery and the battery charges from the tow vehicle when that's hooked up and running, though there's a solenoid in it to disco the trailer power when the vehicle isn't running.
The 3 way fridge of course and the stove/oven and catalytic heater run on propane.
Don't need no steenking inverter.
