Regen // brake lights

[chidd]

I had my Porsche Experience Day this week (v good fun by the way) and the instructor mentioned to me that the brake lights come on when you lift off the accelerator with regen on.

Does anyone know if that's true? If so I will use it a lot less, as part of the reason I use it on the motorway is so that you don't have to touch the brakes to maintain the gap in front, which can be very annoying for the car behind...

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[WuffvonTrips]

This has been discussed in several threads and I don't recall their final conclusions (they might be listed in the "similar threads" section below), but it seems that in general, lift-off deceleration is less than the threshold that triggers the brake lights. Lift-off (or Auto-regen for that matter) from very high (not road-legal in UK?) speed might be enough to cross that threshold and trigger the lights.

 

[O2TheL]

Brake lights do NOT come on when lifting accelerator with regen on. Super easy to prove with a car following you and mobile phone.

Your instructor needs better training.

 

[Tooney]

I had my Porsche Experience Day this week (v good fun by the way) and the instructor mentioned to me that the brake lights come on when you lift off the accelerator with regen on.

Does anyone know if that's true? If so I will use it a lot less, as part of the reason I use it on the motorway is so that you don't have to touch the brakes to maintain the gap in front, which can be very annoying for the car behind...

See if you can reach a definitive conclusion from the 46 posts in this thread: Brake lights during recuperation? Not sure I can.

 

[simcity]

I had my Porsche Experience Day this week (v good fun by the way) and the instructor mentioned to me that the brake lights come on when you lift off the accelerator with regen on.

Does anyone know if that's true? If so I will use it a lot less, as part of the reason I use it on the motorway is so that you don't have to touch the brakes to maintain the gap in front, which can be very annoying for the car behind...

From memory when discussing this topic previously over the years (not just Taycans) It's enshrined in the C&U regs and there is a rate of deceleration beyond which brake lights are applied by the car without use of the brake pedal.

 

[WuffvonTrips]

From memory when discussing this topic previously over the years (not just Taycans) It's enshrined in the C&U regs and there is a rate of deceleration beyond which brake lights are applied by the car without use of the brake pedal.

details in thread that @Tooney linked above-
https://www.taycanforum.com/forum/threads/brake-lights-during-recuperation.15786/post-247435

 

[simcity]

Brake lights do NOT come on when lifting accelerator with regen on. Super easy to prove with a car following you and mobile phone.

Your instructor needs better training.

When I had a Tesla the car graphic on the in-dash display used to indicate when the brake lights were being applied, so it was super easy to tell under what conditions they would come on under regen.

Note that by default the Tesla regen setting is comparatively quite strong, so that would be quite often! ?

 

[simcity]

details in thread that @Tooney linked above-
https://www.taycanforum.com/forum/threads/brake-lights-during-recuperation.15786/post-247435

Sure. I didn't read through the link as it was something lodged in the back of my memory full of useless information ?

 

[Tooney]

From memory when discussing this topic previously over the years (not just Taycans) It's enshrined in the C&U regs and there is a rate of deceleration beyond which brake lights are applied by the car without use of the brake pedal.

Yes, it is in the EU regs.
But, has any owner here verified it actually works on a Taycan?

 

[O2TheL]

100% do not come on in my '22 4S when in Sport mode and regen on.

 

[rim23]

It’s also easy to see when driving at night and watching the side mirrors while passing road signs with your foot off the accelerator as soon as you press brakes you’ll see the road signs reflecting your brake lights, which doesn’t happen if you’re just slowing down due to regen without pressing brakes.

 

[Hirschaj]

I verified last night in my CT with a dirty rear window. Brake light shows up easily on the grime when I press the brake pedal. The brake light definitely does NOT come on when decelerating due to recoup/regen being activated. I know that the brake light WILL come on when auto-recoup is enabled and the vehicle is decelerating past a certain limit.

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