This morning when I went to the garage, the car was humming, and the charge-port door light was green. The same thing happened a few days ago, but usually the car is silent in the morning until I open the door, and the charge-port door light is off. I have the car set to start charging at 1:00 a.m., so it was fully charged (Standard mode) and showed 185 miles ideal range. Should I be concerned about the green light, which I think is supposed to mean "ready to charge," but is not normally on in the morning; or about the humming, which normally does not start in the morning until I've opened the door? It's chilly in the garage these mornings, but not nearly as cold as in the winter, and it didn't do this then. Thanks.