Looking for advice here. My car is parked outside in the Midwest & it’s been cold (for me, anyway, ~7F-20F). To charge comfortably, the battery needs to heat itself, if only to 45F(?) or so. If the battery completes charging, it allows itself to get quite cold, my guess is to 20F or so (all guesses, maybe it’s allowed to go all the way to ambient – I need to get a replacement battery for my temperature data logger – Ha!, an excuse to go for a ride!). Therefore, I made a little spreadsheet to help me target my desired charging rate (XX Amps @ 240V) based on (a) remaining “Rated Miles” and (b) how many hours until I intend to drive again, so the battery will /just/ be done charging before I depart in the morning, therefore keeping a bit of heat (45F?) in the car and a having nearly full (standard 80%) charge. E.g., I’m charging at 240V/12A right now because I had 125mi rated remaining & 12hrs before I drive again.
This isn’t a *bad* idea, is it? I’m trying to avoid the big “heating the battery via the battery” penalty and have the car a little closer to my a$$’s preferred temp when I climb in. Any thoughts about if it’s a bad idea to use this approach for a Range charge (more slowly charging toward 100%)? Based on what I’ve read here & on TMC, it should be fine for standard charge, but /maybe/ not so good for a Range charge, which is fine, I wake up & can bump up to 40A 1-1/2 hrs before Range launch.
400mi (newbie) & totally loving it!