Now bear in mind, these are MY observations in my 2019 Bolt EV Premier. At 100 Deg F ambient and lower, the set point seems to be a reliable 80 Deg F. Really hot days (like OP is getting in AZ) may see the "aggressive cooling" when plugged in only get it down to 85 Deg F. The point that the system cools the battery down to seems to vary a little bit based on ambient temperatures. Those were days when the ambient temperature was around 105-106 or higher, so I'm thinking that the software logic controlling the battery cooling is a little more complex than I originally thought. The target temp for when the car is parked and OFF is usually 80 Deg F, but on some especially hot days I've noticed it stops at 85 Deg F. Plugged in with the Target Charge level set below the current SOC, the car just draws power from the EVSE to run the battery cooling system. The battery still wants to trend into the 90's F, but I reign it back by making sure I plug in (I don't necessarily charge - I use the Target Charge feature to keep the battery from actually charging if I don't want it to). And I park in the shade routinely both at work and under my carport at home. To bring this back around on-topic: in the triple digit heat we've been getting in my area over the last couple weeks I have been noticing a bit of "battery conditioning" draw pretty much daily. I've just never seen this personally at any sites I have ever visited (and I just got back from a 1400 mile road trip in my Bolt where I visited quite a few public charging sites, both L2 and DCFC). And so do the chargers happily enough, which can only help with their reliability. For example I believe some down in the Baker area heading towards Las Vegas have solar panels to help offset energy usage, with the nifty bonus that the cars (and their batteries!) stay cool underneath. I have HEARD of some EVSE sites that have solar panels covering them. It's just such a no-brainer that I can't wrap my head around how lacking public charging is in this respect. longevity and reliability of their equipment). They are our "gas stations" and there are good practical reasons for us to have them - including reasons that are also of benefit to the operator of the site (i.e. I would just like to see that universal acceptance of covers over EVSEs as well. You just don't see them without some form or other of covering. Whatever the reasons may be for coverings over gas stations, the point is they're universal and accepted as a natural feature of HAVING a gas station. Don't these companies - Tesla especially - WANT their chargers to hold up over time? And by extension they'd be helping their customers keep their cars cooler during charging too, which simply increases the energy efficiencies we're all after. Even Tesla leaves their chargers out in the elements. ad nauseum can't seem to figure this out. I can't fathom how EA, EVGo, EV Connect, etc. Leave ANYTHING roasting in the sun (or freezing in a blizzard) unprotected and YES it will break down more quickly than if it were shaded, pretty much guaranteed. Why have I never once seen a public charger with so much as an awning over it - ANY kind of cover - to shade the charger and stall? How expensive could it be, compared to the cost of the station itself? I think that more public chargers would be operable and more reliable if they had SOME sort of protection from the elements. When was the last time anyone ever pulled up to a gas pump that was out in the open air, with no cover of any kind over it? I guarantee you that you've never seen one unless you're 100 years old (and power to you!). Your issue about charging in the sun brings up a rant I have about public chargers (or even restricted chargers). I take care to plug in whenever I can to allow the Bolt to more aggressively cool the battery - I can keep it down in the low 80's F for the most part. Been seeing more draw for battery conditioning lately - just a trifle (maybe 1 or 2 percent).
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