Might be the Auto Defog setting that is doing it, if you haven't turned it off yet. It is a setting located in the center stack settings, not the front/rear defrost button.I have to clarify my original post. The term on the Energy Info screen I'm concerned about is "Climate Control", which I suppose is to track the use of the power-robbing fan, heat/cooling, defrost, Max vs. Eco settings, etc. I drove on a fresh full charge today until the charge was all gone, and finished the 100km trip on the generator. That bar graph stayed stuck on -5 from beginning to end!
I still am none the wiser!
A lot of Gen 1 owners feel that the Auto Defog runs too often and just leave it turned off. However, in my Gen 2, I decided to leave it on, and I think it works better that the Gen 1 version to keep the widows from fogging up. It uses a sensor on the windshield to determine humidity and can turn on the A/C and/or heat automatically.
I see from your signature that our Volts are nearly twins. They were probably on the assembly line together.