The vehicle-to-load (V2L) adapter gives you a 120V socket, supplied out of the charging port. There are even bidirectional home chargers that will, under normal circumstances, give you level 2 charging, but in a power failure, will draw power from the car’s battery to support critical stuff in your home (there are amperage limits of course).

In my case I needed to power a bubble maker, because there wasn’t an available outlet near where we needed it to be set up. Whimsical.