SDRick
Active Member
I think 40.50.1 was the update where they increased the temperature at which regen-capping happens. Regen capping is basically Tesla protecting the battery when it is cold by limiting the amount of charge you can get from regenerative braking. The cap will slowly increase as the battery warms up until it goes away completely. Here are some roughly correct (made up based on my personal experience) numbers to illustrate:
Battery @20F: No regen
Battery @32F: 25% regen
Battery @50F: 50% regen
Battery @65F: 75% regen
Battery @75F: 100% regen
Previously the 100% threshold was somewhere around 50 degrees F, and now it's a fair bit higher somewhere in the 70 degree range. I can tell this from experience since I live in Southern California where it rarely gets below 50 degrees. Last winter I almost never had regenerative braking limited, and when I did it would go away quickly. This winter I have had regen limited every morning even when ambient temps are 55-60F, and it takes much longer for regen to come back to 100%.
Longtime Tesla owner here in Southern California experiencing the same loss of regeneration in moderate temperatures. I hope it's not true but if this is a permanent change to protect the battery in colder temperatures, I hope Tesla will implement something to provide a more consistent one pedal experience.