I generally charge my P85+ at home with a 240V, 50A circuit (which delivers ~40A to the car.) This results in 28-30 miles of range added per hour. I charge my '08 Roadster with a 90A circuit Tesla HPWC (delivers 80A to the car.) Given that the S has dual chargers, I'd expect I could nearly double the rate of charge if I could use the HPWC. A Tesla tech told me that Tesla used to offer an adapter ( Roadster cable/plug to S receptacle) that would make this possible but that it's no longer available. Anyone use one and/or know if a source for these exists?