so this might not be new news, but it was to me.. I drove to Artarmon to fill up with electrons today, only to find all supercharger stalls occupied. In a first, they were all occupied by customer cars - no hire cars!! I waited 10 minutes and then drove home unfulfilled, wishing there was a way to check whether there was a vacancy before I set off. Well, there is. On the Nav screen, if you set the destination to the supercharger site, then press the map pin, it will tell you how many stalls (sounds like a urinal) and how many are free.