I am considering a JuiceBox L2 charger and will probably install a 40 A plug for it as my house only has 100 A service and my electrical pane probably does not have the capacity for a 50 A circuit. The difference in price between the JuiceBox 32 and 40 is only about $50 and I was wondering if the JuiceBox 40 can be used with the 40 A circuit (32 A max current) in case I move or otherwise upgrade to a 50 A plug. There has to be a way to limit the power of the charger right?