I have now had two of these (GE replaced the first one free of charge when I could not get it to work). In both of them, although it is set at 20AMPs, my new Volt tells me that it cannot charge with it. Does anyone have a similar problem? Is there something on the Volt that I need to set? I have used commercial level 2 chargers at parking lots successfully so I don't understand why this does not work. I have had a very experienced electrician install it and it seems to be getting power to the charger but it will not charge the Volt. Any thoughts would be appreciated.