I did a quick analysis to see the efficiency of the Tesla wall connector at various charging speeds. It seems most efficient charging happens when you have a circuit breaker at 40 Amps (drawing 7.7 KW output) followed by at 50 Amps (drawing 9.6 KW). So my question is can a Tesla Wall Charger drawing current from a 60 Amp breaker switch be set to run at 7.7 KWH power rate? Or does the system go for the maximum power rate of 11.1 KW which is the second lowest efficiency in terms of bang for your buck. I have ordered a wall charger and a Model YLR so my apologies if the question is stupid. I have attached a graph showing the efficiency at various power levels. Thanks.