GOOGLE search says the Rally 800W 12VDC INVERTER model 7394 is a MODIFIED SINE WAVE type INVERTER.
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Although alot of folks will use these MSW INVERTER for electronic devices I have always steered away from them. It only has "NOT TO WORK ONCE" before going up in blue smoke. It really doesn't cost that much more to have a PURE SINE WAVE INVERTER just to be safe.
Who knows what someone in the trailer might plug into one just to see it go up in blue smoke...
I use a 600WATT PSW AIMs INVERTER (AMAZON) that cost $149 for all of my electronic home entertainment items plus cell phone chargers and computer chargers etc... I really only need around 250-300WATTS to run these 120VAC devices but having a little extra is nice to have for the occasional higher wattage appliance. A 120VAC Coffee bean grinder is one example... I can also run my cheapo 500WATT WALMART WHite Faced manual operated Microwave unit for a few minutes to warm up some coffee...
My 600WATT PSW INVERTER is direct Connected to the main 12VDC battery selector switch and then I route two 120VAC extension cord drops from the INVERTER Unit with one going to the Home entertainment Center area and the other one going to the night stand area next to the bed. These two location are where 99% of my must have on items are located when camping off the power grid.
Roy Ken