Do not allow the vehicle to remain in temperature extremes for long periods without being driven or plugged in. It is recommended that the vehicle be plugged in when temperatures are below 0 °C (32 °F) and above 32 °C (90 °F) to maximize high voltage battery life.
One key question is just how long a “long period” is. Is a “long period” a few hours while at work, or is it a few days while away on vacation?
Also, this same advice is printed verbatim in the Spark EV manual, but the Bolt has been touted as having a battery with better thermal performance. Are there operational differences (either what the car does or what owners should do) between the two?
I realize that the whole question is of how best to take care of the battery and what the Bolt's TMS does isn't something the Chevy reps like to wade into (even though it would be super helpful to get clarity on all these issues), but here the question is much more direct, what does the text in the car's manual actually mean. I hope a Chevy person can give a clear answer at least to this part.