From my experience today in a massive heat wave in SoCal (105-115F ambient temp), the Soul EV does NOT
have any way of protecting the battery if the car is off, even if it is plugged in.
This data is coming from my EVSE. The orange curve is instantaneous power (kW) and the black line is cumulative energy (kWh) drawn from the wall. From the data above, you can see 4 spikes: these are 4 times when I manually remotely initiated cabin preconditioning via the UVO app. Outside of these 4 cases, the car made no attempt at all to pull any power from the wall. Now, this isn't proof that the battery cooling fan didn't turn on, but at least it didn't pull any power from the wall.
I pulled up Torque and checked the live data: both Batt Fan SPD
and Batt Fan MOD
were at 0. As soon as I turned the car on, the battery fan kicked on to level 5-6. But as soon as I shut off the car, the battery fan turned off as well (and showed that way on Torque). If the Soul EV's default behavior is to do nothing in extreme heat, well this isn't a good thing.