Battery heating question - Cold Weather

[tinsley207]

Hello All,
It's been a while since I've posted but I have a question about best cold weather practices. I have a 2016 Kia Soul EV has that lived most of it's life in my garage but now needs to spend more time outside in my driveway. I live in Maine and the temps can get pretty cold here. This morning it was 2 degrees F when I got up. Here's my question. On a cold night like this, does it make sense to charge the vehicle with a level 1 charger over a longer period or with a level 2 charger closer to the morning hours? I was thinking the level 1 would sort of "trickle" charge the car and activate the battery heater. Is that right? Or does it make more sense to just use the level 2 charger which theoretically add's more voltage and therefore more "heat" to the battery just through charging. I guess what I'm driving at is, is it ok for the battery to get very cold overnight before it charges with level2? I can also confirm that my SOH is 90.5% according to EV SPY and I just hit 80k miles in the car. Thanks in advance for your input.

 

[JejuSoul]

I do not have a battery heater in my car so I cannot give you a good answer on charging techniques in cold weather. But a couple of things to consider.
Trickle charging is much less efficient than level 2. see Onboard charger : less efficience at low power ?
Trickle charging may not provide enough power to run the battery heater.
Trickle charging does not provide enough power to run the climate heater to warm the car before you get in it.
Over the long-term trickle charging may increase longevity ( But depending on driving style, climate, etc as well.)

My reality is to level2 charge so that the car is warm in the morning. Caveat no battery heater and not a cold climate.
-----------Daily High and Low Temperature for Jeju,South Korea. (pre-Global-Warming)