So if you charge to 90%, does the car have to stay plugged in to precondition the battery? I only plug my car in once a week or so. Now that cold weather is here, I have a noticed my normal short daily trips are using a few more percent of battery.
I'm not sure if you can precondition battery if not plugged in, I wouldn't be surprised and wonder how much battery power would be reqd?
Up until July Volvo recommended charge to 80% , then update 1.4 came out and now recommends 90% due battery preconditioning.
I find that at 90% plugged in I can tell app to heat car( and battery) 30 mins before I leave and everything is nice and cozy warm plus battery drain initially is almost normal. When I tried to do the same thing at 80%, I found that over 50% of the time the car would start to heat interior and then quit after a couple minutes according to my app and I would find car was only partially heated and initial battery wasn't as good as at 90%, so I'm still on the fence on which way to go.