limited regenerative charging (not cold, not fully charged)

[carrot]

We have a 2015 Model S. Example of problem. It is 60 degrees outside. The car is only 50% charged. The regenerative charging shows yellow dashes. Even starting at a high speed it charging is limited to only 20-25 wh. Everything I read says the problem is that its cold or fully charged. What else could cause this? Thank you

 

[jjrandorin]

Just because you dont think its cold, doesnt mean that your car's battery isnt cold.

What else could cause this? Thank you

The battery being cold. it was not 60 degrees all day / night.

 

[Zythryn]

If your location is the location of the car, the battery was likely cold soaked.
Langley, WA had overnight temps in the mid 30s (Fahrenheit).
If you don’t have the car plugged in overnight, try doing so. Preheating the car can help mitigate that as well.

 

[ucmndd]

60 degree cell/pack temp is not warm enough for full regen. I can’t recall the exact number but there’s been some discussion on the topic here in the past and as I recall it’s north of 80 degrees in recent firmwares.

 

[carrot]

We have a 2015 Model S. Example of problem. It is 60 degrees outside. The car is only 50% charged. The regenerative charging shows yellow dashes. Even starting at a high speed it charging is limited to only 20-25 wh. Everything I read says the problem is that its cold or fully charged. What else could cause this? Thank you

One thing for sure, I never claim to be smart. I do appreciate all the feedback but... It has been happening all summer also. I can't believe the batteries are colder than the outside air when it's 50-80 degrees outside. It doesn't only happen in the morning, and it is still happening at 4PM after driving for an hour. The batteries are not cold soaked. If I plugged it in all night that might help warm the batteries, but then it wouldn't regen fully because I would be driving on a full charge. Any additional thoughts that do no have to do with cold batteries?

 

[bro1999]

That's one thing I've noticed about my SR+3....the battery seems a lot more sensitive to temperature (WRT regen braking) than my previous Chevy Bolt. The Bolt, unless it was sub-freezing overnight and unplugged, almost never had reduced regen braking alerts, but in the 3 I have then almost daily these days (even if the temperatures are a relatively mild 50F). Guess the battery chemistry is just more sensitive to temperatures than the Bolt's.

 

[milnerb1]

I have the same iss

One thing for sure, I never claim to be smart. I do appreciate all the feedback but... It has been happening all summer also. I can't believe the batteries are colder than the outside air when it's 50-80 degrees outside. It doesn't only happen in the morning, and it is still happening at 4PM after driving for an hour. The batteries are not cold soaked. If I plugged it in all night that might help warm the batteries, but then it wouldn't regen fully because I would be driving on a full charge. Any additional thoughts that do no have to do with cold batteries?

I agree with you 100%. This is not due to the battery being too cold. I have two Model S's manufactured within 1 year of each other. One is always restricting regen and the other is not. I'm wondering if the battery heater needs to be replaced. I know that there are several heating elements in the PTC Cabin Heater and when some of the elements go out, the car does not fully warm up. It may be the same with the battery heater.