I still use a $15 heated blanket in the winter, I also use a 12v defroster to keep the window from fogging. To run both at the same time I had to add a supplemental key-switched, fuse protected power outlet as both items will exceed the stock fuse. search my posts to see it. I've got a 33 mile commute with a 8-bar '12 so its on the edge what is possible in a cold climate. The biggest factor is wind, if there is a strong headwind I loose 10 miles range so I check the weather and if I have a head wind I take back roads and go 45mph, it kinda sucks.