In Tucson, summer is later this week. Then it will be time to plug in the Bolt to optimize the battery system cooling effect. I have tired, but failed to find some threads on what is the best strategy for very hot days and nights. If someone knows some threads with good advice, please post a link.
I have one specific question. Somewhere the manual states that when plugged in the cooling system activates more frequently (couldn't find it today). If I am using time of departure charging, will the battery cooling system be as active as if I use the plug and charge immediate option?
Any other specific recommendation, except move to a cooler climate, would be appreciated.
I don't own a Bolt, and my response is not directly to your point, but I do have a kind of different-but-related suggestion or pet-topic that may or may not apply as much (if at all) to a Bolt or other modern liquid-cooled vehicle. I used to mention this to fellow drivers here once in awhile.
My suggestion is to avoid, if possible, charging (or even parking) in the direct sun, and particularly avoid public charging in direct sun during the warmer months. The immediate extreme example that comes to mind is a DCFC with no shade, but it could also include an L2 where you will be parked for awhile, or just a decision at the airport long-term parking lot of whether to spend a few extra dollars and park in a shaded spot rather than under direct sun. Choose the shade if you can, in my view. It is a practice borne out of a more extreme situation where I had an air-cooled Leaf and it seemed best just to err on the side of caution. I don't really "know" that this will help, but part of how I think of it is that I know sometimes my body will tell me "yeesh, it's hot, you need to get out of the sun ASAP". If our cars and batteries could talk, maybe they would also say this. Yes, I understand that in a way a Bolt running its cooling may already be taking effective measures.
I used to argue a bit that most or all public stations in Arizona should come with a Ramada or shade of some sort, but unfortunately too often this attempted suggestion would get side-tracked by someone wanting to talk up onsite solar panels. Clean energy charging is great, but it is not the point I was trying to make.
Now, I should immediately add, since I do not own a Bolt, that for all I know, the liquid cooling and other programming onboard the Bolt obliterate the need for this sort of caution, so I really don't know, but just an idea.
PS: On the airport parking:
Over the years, this one particular lot has emerged as the only one (so far) offering (L1 wall-plug) charging in shaded spots. Unfortunately they have not hard-wired yet for J1772, and their plugs sometimes do require a check to verify they are hot before you leave your car and go get on your flight, so I have learned to just make sure my car is not only plugged in but actually charging. I do recommend "joining" this company for free and getting their RFID card if you have not done this already. It's just slightly more convenient to make reservations and keep track of bonus points earned and such. I did run into a Bolt driver at a TEVA meeting who discussed with me that he was really pleased with this airport parking option. This is not a big-town airport, and Tucson does not yet have a lot of electric vehicles, so others from bigger cities with lots of EVs may regard all of this as very small-time stuff, but I've been really happy to see this parking lot come along a bit in what it is offering, though they still need to finish the job and hardwire some L1 J1772 in there, IMO.
PPS: As I think about it, maybe at the airport, if you can afford it, a better option arguably is to park in the garage away from the wall/window spots, and just stay much much more out of the sun. I don't think they offer charging there yet.