I should be getting my Model S in early December! While I'll do most of my charging at home or at Superchargers, I often park at Phoenix Sky Harbor airport. One of the parking facilities has standard household 120 VAC 15 amp outlets available for electric vehicles. I know the charging rate is slow, but if the car is plugged in for 3-4 days while I'm on a trip, it'll be fully charged when I get back, thus eliminating a Supercharger stop on the way to Tucson or Flagstaff. I believe the car comes with an adapter to fit the UMC to a household outlet. I have not yet parked at this parking company location, so I don't know how far the outlet is fro the parking stall, so I don't know if I'll need an extension cord. If I do, what gauge should the extension cord be? I doubt it would need to be more than 15" feet long. Are there any other issues I need to be aware of?