Bluetti AC180 test on washer - fail to start 

It actually says in the manual that if you have if have it plugged into the wall and running AC at the same time the AC will bypass the batteries and pull power straight from the wall plug.

It may need to have a ground that's why it works with the cord plugged in Would like to see you plug a bonding plug into it and see if it works then. Just a hunch

Mine didn’t come with a screen sticker. Do you think I received a used unit?

Not sure what you do wrong mine works😅

Have you tried upgrading the firmware? I got mine last week and first thing I did was upgrading the firmware