We have ours plugged in right now in our barn to a regular wall outlet using an adapter. It's just to keep the ceiling fan running and the ability to have lights and occasional water pump use (when we're too lazy to go inside the house to use the toilet). We've ran the fridge before this way as well to get ready for a trip, but as we have a month before our next one, it's currently off. No way would we try to use ACs or anything else.
We have a 50AMP outlet but it's on the "wrong" side of the barn and requires a long extension cord. So this is easier.