The best thing that Tesla has done is to allow the Model S to be charged with a $5 to $8 NEMA 14-50 receptacle. Only a 50 amp breaker is needed for the NEMA 14-50. As you can see in MTN Ranger's post on the previous page, there is a NEMA 14-50 receptacle on the wall under the charge station. I plan to install both so two Telsas can charge at the same time. For the fastest charge at 62 mph, you must have a 100 amp circuit breaker for the High Power Wall Connector and the twin charger option built into the Model S. A smaller breaker can be used for a slower charge with the Wall Connector. (A 200 amp second meter panel was installed after purchasing the Volt with the knowledge that the Tesla would need the extra power.)
Tesla includes with each Model S, the 240 volt adapter, 120 volt adapter and a J1772 adapter for charging almost anywhere.