If I purchased a used Model S that had only one charger, is is possible to have a second charger added at a later date? It would seem this should be doable by just replacing the wiring from the connector to the charger and adding the second charger with wiring to the pack. I would think that Tesla should be able to perform this upgrade at some cost...perhaps not the cost listed as an adder when new ($1500) but perhaps for $2000 or something. The only other issue would be that the VIN would not match the car because the number of chargers is listed on the VIN in character 7:
Somebody asked that question earlier. Yes it can be done, but it is not easy. Expect ~$4,000 to do it after delivery.