Too Hot to Handle
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Driver
Joined: Sep 2009
Posts: 56
Likes: 6
From: Wa
Too Hot to Handle
Yesterday was a very hot day for Seattle, 90 degress. I drove my RZ on a few errands with the A/C on, stopping periodically to shop. etc. I got home about 7:00pm when the temps started to drop a little. Plugged in the RZ for a charge and.....nothing. It would not accept a charge. (My home wall charger was functioning just fine.) I waited an hour... nothing. Two hours.... nothing. Finally after three hours the little green light came on. Viola! It started to charge.
Question is: do the folks in Arizona and Texas deal with this everyday? It was only 90 here during the day. They have temps MUCH higher on an ongoing basis.
Question is: do the folks in Arizona and Texas deal with this everyday? It was only 90 here during the day. They have temps MUCH higher on an ongoing basis.
Lexus Fanatic
Joined: Sep 2010
Posts: 26,184
Likes: 4,378
From: Alberta
From what I understand Lexus RZ lacks a comprehensive coolant loop which means there are scenarios like yours where the battery pack is simply too hot to accept a charge. These battery packs will be damaged if charged when the cells are too hot. If you feel like it give your local dealer a call and ask them what's up maybe your experience is not normal.
Driver
Joined: Jul 2024
Posts: 95
Likes: 28
From: NY/NJ
Yesterday was a very hot day for Seattle, 90 degress. I drove my RZ on a few errands with the A/C on, stopping periodically to shop. etc. I got home about 7:00pm when the temps started to drop a little. Plugged in the RZ for a charge and.....nothing. It would not accept a charge. (My home wall charger was functioning just fine.) I waited an hour... nothing. Two hours.... nothing. Finally after three hours the little green light came on. Viola! It started to charge.
Question is: do the folks in Arizona and Texas deal with this everyday? It was only 90 here during the day. They have temps MUCH higher on an ongoing basis.
Question is: do the folks in Arizona and Texas deal with this everyday? It was only 90 here during the day. They have temps MUCH higher on an ongoing basis.
For what it's worth, we've had multiple 90+F days in NJ this summer, and our white RZ is usually parked outside, so it bakes to an even higher temperature.
I've never had a problem getting it to start charging on any of those days.
Perhaps there was an issue with your L2 charger?
That is not accurate.
RZ's battery's temperature is managed via the cooling system for its battery pack (same as for 95+% of the EVs out there), ensuring optimal performance and longevity. In cold weather, RZ's system relies on HVAC heater to help warm the battery and ensure it can accept a charge.
If the battery was overheating before you parked, you would have gotten error codes to that effect.
Either way, you can run this by the dealer and have them scan for historical error codes. Or you can do it yourself with an ODB2 scanner.
I doubt they will find anything. I would look into the charger first.
HTH,
a
Last edited by afadeev; Jul 31, 2025 at 06:28 AM.
Driver School Candidate
Joined: Apr 2016
Posts: 19
Likes: 7
From: SCOTTSDALE, ARIZONA
I'm in Arizona and never had any problems charging with temperatures over 110 degrees.
You might have a charging schedule setup in the application.
Check that.
You might have a charging schedule setup in the application.
Check that.
Last edited by almot; Jul 31, 2025 at 02:28 PM.
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