I am wondering ( and salivating) after just discovering Jeep's invention: 4 plugs board 1800W each conected to the regular charging socket. Looking at it: justba regular charging EV cord with 4 outlets on the other side. Obviously, insude are transformer, some circuit breakers, protection. There must be a comtroling settings on the vehicle side as well With Prius Plug-in ( Prime) it would have a tremendous benefit. Regular ones may be useful outdoors with a running engine. As of now it is impossible to use on anything but Jeep. But may be daredevils here would sugest some kind of vivisection or at least point to a dream https://www.motortrend.com/how-to/2024-jeep-wrangler-4xe-power-box-deep-dive-review/
I'm seeing them on ebay for <$200. I'm tempted to buy one and see if it can be modified. EDIT: Nevermind. It looks like the power box is fed with 120vac from the battery. They must have an onboard inverter. Its nothing more than a fancy power strip.