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Regenerative Braking: Standard Mode Quit Working

MichaelP90DL

Active Member
Apr 19, 2019
1,571
1,578
Lancaster, CA
I have my car set to Standard for regen braking. This morning, I unplugged the cable, planted my foot on the brake, flipped into drive and took off. A surprise happened as I approached a stop sign: The car barely slowed. Hit the brake. I checked the driving screen and standard regen braking was active. I tapped low regen then standard. Resumed driving. Low regen only. What the heck? I pulled over and stopped. Put it in park, exited and the car turned off. Got back in, resumed driving, but still low regen only. I had a 70-mile trip to LA to do, so I took off, using Autopilot. An hour later, I exited AP and noticed standard regen was finally working. I made a few stops at various shops, and when I resumed driving, the car remained in standard regen. That was a little weird.

Has that happened to anyone else?
 

Alex362

Member
May 16, 2018
21
19
New Jersey
I have my car set to Standard for regen braking. This morning, I unplugged the cable, planted my foot on the brake, flipped into drive and took off. A surprise happened as I approached a stop sign: The car barely slowed. Hit the brake. I checked the driving screen and standard regen braking was active. I tapped low regen then standard. Resumed driving. Low regen only. What the heck? I pulled over and stopped. Put it in park, exited and the car turned off. Got back in, resumed driving, but still low regen only. I had a 70-mile trip to LA to do, so I took off, using Autopilot. An hour later, I exited AP and noticed standard regen was finally working. I made a few stops at various shops, and when I resumed driving, the car remained in standard regen. That was a little weird.

Has that happened to anyone else?
What was your state of charge when you started trip?
 

Hugh Mannity

Mediocre Member
Jul 31, 2014
1,349
805
Calgary, AB
100%. Up from around 40% the night before.

so two things if you've never experienced either:

1. if your battery is at 100% SOC you will have virtually NO regen until there is enough "room" in the battery to store the power generated back in.

2. What was the ambient temperature where you live when you left ? Have you ever seen the dotted lines where the re-gen green line shows ? That means the battery is too cold and won't accept a charge. I live in a cold place; if the pack is below freezing I have virtually no regen ever until the pack heats up enough
 
  • Informative
Reactions: Snowstorm

GHammer

What a long strange trip its been.
Feb 1, 2016
903
2,101
Wren, Oregon
I guessed wrong. A cold soaked battery will also not accept a charge and have reduced regen until it warms up. It was on my mind since that's what I ran into this morning, 16F and parked outside.
 

Jim T

Member
Sep 8, 2017
57
29
Murfreesboro, TN
I have my car set to Standard for regen braking. This morning, I unplugged the cable, planted my foot on the brake, flipped into drive and took off. A surprise happened as I approached a stop sign: The car barely slowed. Hit the brake. I checked the driving screen and standard regen braking was active. I tapped low regen then standard. Resumed driving. Low regen only. What the heck? I pulled over and stopped. Put it in park, exited and the car turned off. Got back in, resumed driving, but still low regen only. I had a 70-mile trip to LA to do, so I took off, using Autopilot. An hour later, I exited AP and noticed standard regen was finally working. I made a few stops at various shops, and when I resumed driving, the car remained in standard regen. That was a little weird.

Has that happened to anyone else?
Happened to me today. Battery charge @ 60%. Ambient Temp 64 deg F. 'Regenerative Braking' set for standard. Tried toggling between 'standard' and 'low' several times to no effect. Can't think of any other reason for Regen braking being limited....
 

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