how has has your energy usage gone?

crazy!

Probably just the pack heater. It should come down to normal ranges (for winter) after you get a few more miles under your belt for that particular driving session.

Wow! What was the outdoor temperature, and how long a cold soak did you have before starting out?

Here in MD, we have it relatively easy and the coldest I've seen in the Tesla so far in two winters is -15 C (5 F). It sits at work all day and puts on a pretty big burst for the first 10 miles when I head home. But I don't think I've seen it go much off scale (600 Wh/mi, 900 Wh/km). Today it wouldn't go up much at all and I eventually realized I had range mode enabled to see how much it limited the load. ;=)

Definitely the car doing it's own thing prior to you driving it. Happens to me too. Sometimes, I pull out of the garage and I have 999wh/mi and other times it's 340 or so. Depends on how the car is managing itself from when you last parked until your next drive. Having it plugged in changes the number dramatically. But it settles right down after a few miles.

I had something like that when I got stuck in a 5 hour traffic jam going up the mountain to Big Bear Ski Resort.

I always thought going slow would gives the best range, but it turns out stop and go up hill traffic at an average of 2 miles per hour and hour is not ideal. :smile:

I was up over 1400 watts per mile for several hours. At one point it estimated my rage to be 17 miles (and I had over 23 miles to go!). Once I got past the chains required check point, I was able to go 30 mph for the last 20 miles, and ended up with 90 miles RM when I arrived.

With range mode off, with a very cold battery pack the car will use a lot of energy to heat the pack. If you turn on range mode, you will limit the power used to heat it. It makes a significant difference, but it also reduces cabin heat. You may want to switch it on and off multiple times during a particular trip, depending on your needs.

smile...