Yep, I had a ground sensing issue when using a Tesla charger as I t needs to sense that the neutral is grounded. The solution was to bond the normally floating neutral and ground in the BLUETTI.
I was doing this by using a plug into one of the Ac200 receptacles. The plug just had a jumper between neutral and Ground. You can buy a plug at any hardware store and then just add a small jumper.
Yes, I can attest to the same issue and solution with the Tesla charger. You need to connect the neutral and ground together.
Note that the AC200P wont charge an EV very much… At 2kwh capacity, you would probably get 1.5kwh into your EV battery after conversion and charging losses. May work in a limited emergency where you need a few km of range, but it probably won’t get you more than a few blocks.