We had a massive heatwave here in SoCal today (105-115F) ambient temps most of the day, and it was interesting watching the Volt pull power from the wall to cool it's battery pack automatically:
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. Looks like the A/C cooling fired up roughly every 30 mins, and ran for a 8-minute session each. The power spikes to 2-2.3 kW and then levels to 1.3 kW for a bit before shutting off. I eyeballed the chart and it seems like each session pulled roughly 0.18 kWh, but this seems a bit on the low end.
Do ignore the massive 2nd and 3rd spikes-- those are from when I manually initiated remote cabin precondition sessions. I'm used to doing that for my non-active battery cooling EV (I won't mention which
), so I did this out of habit. I stopped manually preconditioning once I saw this chart of it cooling itself automatically!
tl;dr: Volt's active battery TMS ftw!

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. Looks like the A/C cooling fired up roughly every 30 mins, and ran for a 8-minute session each. The power spikes to 2-2.3 kW and then levels to 1.3 kW for a bit before shutting off. I eyeballed the chart and it seems like each session pulled roughly 0.18 kWh, but this seems a bit on the low end.
Do ignore the massive 2nd and 3rd spikes-- those are from when I manually initiated remote cabin precondition sessions. I'm used to doing that for my non-active battery cooling EV (I won't mention which
tl;dr: Volt's active battery TMS ftw!