Agree with this. It seems that most who see 40% loss are driving in Montana or similar, gale winds with large elevation changes. Not typical NE or mid-Atlantic conditions.
Thank you @CSFTN ; my assumption of 40% loss was actually based on a blog post for someone who had bought an 85D, and lived in MA. Not too far from where I live (can't seem to find the link now, but will paste here once I find it again).
When doing my calculations, I actually added a buffer to that, and assumed a 55% loss, just to be safe.
Thank you @JohnQTwo questions: 1) do you have access to charging at your place of work? I'm assuming you don't since you're concerned about having range for the full 170 mile round trip. 2) How fast do you drive?
1) Checking online, I could find a Tesla Destination Charger less than 3 miles from where I'll be working (Ridgefield, CT, if that helps)
2) I usually average around 75, with speeds varying between 70 & 80mph (rarely go over 80).
What I'm planning on doing over the next couple of weeks is to actually drive out to the place and see if they have any chargers in the parking lot that are not considered 'public'. If they do, then we have a much easier problem to solve here.
I'm in SW CT and have a 2013 85kWh that I've owned since new. When it was new, I could make the drive to Boston--exactly 170 miles--in the dead of winter if I charged to 100% and kept the speed between 75 and 80 mph. 100% charge was 265 miles and I usually arrived with about 40 miles when temps were in the single digits. I'd then charge up over 10 hours at an L2 while at work (this was before there were any superchargers on the I-84 to I-90 route) and make the drive home the same day.
If you don't have a charger at work you have to consider the energy to reheat the cold soaked battery while you're at work. If you slow down, that'll help, of course. I'd honestly be uncomfortable with that drive in the winter, including the cold soak, with less than 250 miles range. You'll get killed on range if there's slush on the road and that would definitely require a supercharger stop on the way home.
I still wouldn't get the Audi or BWW, I'd just get the right Model S for the job if it's in your budget--current model year LR.
Thank you for explaining your ownership experience, this actually helps.
You also bring up a great point; my commute is going to be something like this in the dead of winter:
- Leave garage at home, fully charged (% charge TBD, based on model)
- Drive 85 miles
- Sit for 10 - 12 hrs in single digit freezing weather - I'm sure I'll venture out for the occasional lunch every now & then
- Drive 85 miles back
That last bit is the one in question
I want to make sure I have enough juice, after pre-conditioning, to allow me to drive back with no issues.