I know that this topic is discussed to death, but I am wondering about those -20c to -35c days, setting a scheduled departure prior to leaving and then warming the car up fully while on wall power is the best "normal" method to drive.. But what if I wanted to add some more heat to the battery?
From what I understand, preconditioning via scheduled departure brings the battery up to 15c as a target, which is not that warm, and in those real cold days still barely gets me full regen or if it does it's only for 10 minutes. Driving on those cold days seems to essentially lose temperature (wish I had a scanmytesla to verify) while driving. Also, from what I understand, preconditioning the car to supercharge targets 60c.
What I am thinking, is that because the battery is such a large thermal mass, and it gets better efficiency in general when its warm, and the heat pump instead of being in "heating mode 5" (heating both the cab and battery while driving), if the battery was already warm it could focus on just the cab and use less KW in general... I am wondering if somehow preconditioning for a supercharger while at home plugged in would give better efficiency for a long time while driving.
I am thinking the easiest way would be hop in the car, turn the climate control to OFF, then setting navigation to a supercharger (this is after it had a scheduled departure and maybe an hour before I leave so the battery is decently warm), and getting out but not fully shutting the door but instead leaving it open a crack... This would fire up the motors and heat pump to warm the battery to supercharger temperatures, then maybe 15 minutes before I leave I turn the climate on, hop in, and go.
This would allow it to pull 8KW (SR+) from the wall all towards the battery heating and because it's such a large thermal mass, having it at that 30-40c+ instead of the 15c from scheduled departure would get me much further, and allow me to do less supercharging, and since my home power is so cheap, it would be a lot cheaper in general for those 400KM round trips in winter.
Does any of this make sense? Has anyone tried this? Another way to get it to precondition manually would be having one of those S3XY Knobs, and that has a button to manually precondition... I think I'd still have to leave the door cracked.
From what I understand, preconditioning via scheduled departure brings the battery up to 15c as a target, which is not that warm, and in those real cold days still barely gets me full regen or if it does it's only for 10 minutes. Driving on those cold days seems to essentially lose temperature (wish I had a scanmytesla to verify) while driving. Also, from what I understand, preconditioning the car to supercharge targets 60c.
What I am thinking, is that because the battery is such a large thermal mass, and it gets better efficiency in general when its warm, and the heat pump instead of being in "heating mode 5" (heating both the cab and battery while driving), if the battery was already warm it could focus on just the cab and use less KW in general... I am wondering if somehow preconditioning for a supercharger while at home plugged in would give better efficiency for a long time while driving.
I am thinking the easiest way would be hop in the car, turn the climate control to OFF, then setting navigation to a supercharger (this is after it had a scheduled departure and maybe an hour before I leave so the battery is decently warm), and getting out but not fully shutting the door but instead leaving it open a crack... This would fire up the motors and heat pump to warm the battery to supercharger temperatures, then maybe 15 minutes before I leave I turn the climate on, hop in, and go.
This would allow it to pull 8KW (SR+) from the wall all towards the battery heating and because it's such a large thermal mass, having it at that 30-40c+ instead of the 15c from scheduled departure would get me much further, and allow me to do less supercharging, and since my home power is so cheap, it would be a lot cheaper in general for those 400KM round trips in winter.
Does any of this make sense? Has anyone tried this? Another way to get it to precondition manually would be having one of those S3XY Knobs, and that has a button to manually precondition... I think I'd still have to leave the door cracked.