Why not have an additional socket inside the car? Then we can have a "Mennekes Type 2 socket" which is inside the car and more protected against vandalisms.Or, more to the point, simply have a single 3-phase charger in the place where the two 1-phase chargers fit. The problem lies not with the charger, I believe, but rather with the pin design of the charging port, which clearly cannot handle 3-phase power.