As we always regulate around the point of feed-in, you could store a positive eco-offset in your meter so that we always try to feed some power into the grid. In the wallbox settings, the parameters for charging power in amperes and phase switching must match your car and your wallbox. You should select “Clever” mode as the charging mode and set the slider for the solar component to 100%. Once you have done this, all you have to do is activate automatic charging via the switch on the wallbox in the device overview.