Hey,
@DeaneG! I'm trying to better understand the first line above... At what SOC level does leaving the car idle in hot weather become a potential problem? I can see where 100% would be risky, but what about a SOC approaching 100%, but not quite there? After I saw your note, I drove around enough to get the car to 97%, but wondered if even that was too high. While probably poorly stated... I'm guessing the problem you are referencing could only arise when the battery is so maxed out that some action or reaction is 'forced' due to there being nowhere else to go.
Also, what temperature would you consider 'hot'? We are hitting around 95 degrees in Seattle today, which would have me running the heater if I were still in Phoenix!