Regen Sometimes Not Working?

[Big Toys]

2015 70D. Lately I've noticed that after a supercharge, or after a moderate charge, I'll start driving, and notice that regen not giving that "grip". It is a bit unnverving not having the care slow by itself once yo are used to it. It seems to come back on later in the trip, or maybe after a certain speed, I can't tell. The setting is on "Standard". I switch it to Low and back, I've rebooted, nothing seems consistent. Does this happen to anyone else?

 

[Tam]

..."grip"...

Regen is strongest when your battery is low and weakest or none at all when your battery is fuller or fullest.

It's also weakest or none in cold weather (until it warms up).

 

[Langhorne]

Not unless the battery is almost full or too cold like @Tam stated. I see that you joined the forum a few months ago - I am not sure how long you have owned the car so I might be pointing out the obvious, but if you see yellow dotted lines on the energy meter, regen is limited.


Everything you learn as a new Tesla owner in winter

 

[ewoodrick]

You very possibly should be seeing the dots in the blue power line indicated limited regen. It's basically saying that I can't recharge a batter that is already charged, so no regen.

 

[animorph]

Are you charging above 90%?

 

[rsg123]

I agree it’s unnerving at high SOC when you actually have to use the brakes to slow down. It makes you realize you are driving an extremely heavy beast.

 

[David99]

For full regen to be available the battery has to be at aprox 86% or lower. It also depends on the battery temperature, but if you just charged at a Supercharger, your battery is definitely not cold.

It's an issue that unfortunately part of how batteries work today. If they are close to fully charged you can't charge them at a high rate which regenerative braking mostly is. The higher the state of charge, the lower the allowed charge rate, and the weaker the regenerative braking power.

Same is true for a cold battery. The colder it is, the lower the allowed charge rate. Below freezing temperature, the battery must not be charged at all to prevent damage.

It would be nice if the car could automatically compensate by applying the friction brakes to give a consistent braking experience.

 

[TomJock]

2015 70D. Lately I've noticed that after a supercharge, or after a moderate charge, I'll start driving, and notice that regen not giving that "grip". It is a bit unnverving not having the care slow by itself once yo are used to it. It seems to come back on later in the trip, or maybe after a certain speed, I can't tell. The setting is on "Standard". I switch it to Low and back, I've rebooted, nothing seems consistent. Does this happen to anyone else?

Happens to me a lot lately (2017 S 90D). Seems to work more consistently at < 10mph, but I can’t identify any pattern.