For my 2016 Volt I need to run the defroster to be able to actually see out of the window though. And that takes around 4KW on average. I can get less than hal

For my 2016 Volt I need to run the defroster to be able to actually see out of the window though. And that takes around 4KW on average. I can get less than half the range on cold days in the winter (65 MPGe) vs the maximum in the summer (140 MPGe)