I do have this nifty auxiliary power supply that has jumper cables, an air compressor, and an inverter supplying two AC plugs. I ran my home upright air conditioner for nearly an hour one blackout. On another one, I ran an AC fan even longer.
It also has 12V 'cigarette lighter' plugs for DC use, and that lasts even longer. I have a couple of 12V fans I've been using ever since I tent camped, and they still work. I use them in my trailer when I don't have shore power or generators.
I suspect there is no easy way to use this inverter for my trailers needs, so I won't even ask.