@paco You can get a configurable EVSE that will limit what it will draw. As an example, I have a J+ Booster that I have set to 24A on my 30A circuit. I do use an adapter since it came with a 14-50 plug.

Adapters are kinda frowned upon for these kinds of cases, but so long as you can limit the draw, it should be fine.

In your case, I'd probably limit it to 16A or 20A since it's shared with something else and you want to follow the 80% rule on a circuit.