You can do bidirectional with most GM vehicles now with the GM energy solution. I don’t have this but I did have a call with them.
Thier max output is only 9.6kW so it can’t do a whole home backup and the car can only run in backup mode when the grid is out.
> Thier max output is only 9.6kW so it can’t do a whole home backup and the car can only run in backup mode when the grid is out.
9.6kW should be enough to backup your entire house, that's 87A... Lots of people only have a 100A supply in general. Depending on your setup you may have to limit what you use at one time but even in a large house that will be more than enough for AC, lights and electronic devices.