Last week I took delivery of my new red Tesla at the factory. My wife already has a Leaf and uses our J1772 AVinc charger to top it off every time she takes a trip, so it's basically plugged in all the time when the car is in the garage requiring coordination as to who was going to get the one plug. To avoid arguments about whose car did or did not get charged up I added a separate NEMA 14-50 outlet so I could plug in the Tesla and because I only have power (50A circuit) to charge one of the EVs at a time I needed a method to transfer power to one or the other cars on some prearranged schedule. To solve this I went to the local electric supply store and bought two 50A contactors, and an electric timer control with NO and NC contacts. I wired the timer control to the contactors so that one or the other of the charger circuits are powered up. Then I set the timer so that the LEAF charger is on 20 hours a day as the Leaf has only a 3.3KW charger and slow and set the Tesla to be charged in the middle of the night. It seems to work pretty well and there is a manual switch to power one or the other up separately.