We drove the last leg to the borth of our trip today when we visited my parents at our "cottage". Getting norther the weather was getting even colder, it was almost -30 degrees at our destination.
Even if the trip wasn't that long and we were avle to start off with full battery I wanted to save some energy and minimize charging times along the way. This is a day trip that at warmer weather could easily be done with full battery without any additional stops with our current car.
The increased consumption comes from the heating. Keeping the car at comfortable temperature took additional 9kW per 100 km on out way here. For this shorter trip I dropped the temperature down by 1,5 degrees. The result was that the consumption dropped by 3kW! The energy requirement really goes up drastically at those extremes.
It's easy to forget the effects of exponential growth while the line is usually still on the horizontal part of the scale. Things don't change that much until they do. Reaching that vertical phase comes as a surprise.