I am in the process of installing solar panels on my roof. And would like to create a system, where the car is charged on excess electricity and it is exported to the grid only if the car battery is charged. The solution that I have found is to add Sunny Home Manager to the SMA system, and use Mennekes Amtron EVSE for the car, as shown below. Does anyone have experience with such a setup? Does it work as you expected? Can you suggest another / better way to do this?