Operating Taycan while stationary and connected to charger

[Docjonday]

Hoping someone can explain this……

If my Taycan is connected to my domestic electrical supply and I turn on the radio / PCM, it will operate for 15 mins before switching off (to prevent battery discharge). If I switch on the car via the Power button, this makes no difference.

In an ICE car, it makes perfect sense why the sound system / PCM switches off after 15 mins or similar - the 12v battery powers the PCM and cannot maintain charge without the alternator providing charge from the engine turning. How does this apply in an EV?

I’m assuming that the 12v battery is charged from the main battery pack, this itself being charged from both regen in use and the external electrical supply when connected at home. Is that correct? If so, why is it that when the vehicle is connected to a charger, fully charged and able to call upon power from the domestic supply, that the PCM will not work beyond 15 mins? Surely the constant availability of electricity should mean that the PCM works indefinitely in that scenario?

I suspect there is some flaw in my thinking on account the Taycan won’t allow you to use the PCM for longer than 15 mins while stationary. So, I’d be grateful if someone in the know could shed some light on this.

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[W1NGE]

Hoping someone can explain this……

If my Taycan is connected to my domestic electrical supply and I turn on the radio / PCM, it will operate for 15 mins before switching off (to prevent battery discharge). If I switch on the car via the Power button, this makes no difference.

In an ICE car, it makes perfect sense why the sound system / PCM switches off after 15 mins or similar - the 12v battery powers the PCM and cannot maintain charge without the alternator providing charge from the engine turning. How does this apply in an EV?

I’m assuming that the 12v battery is charged from the main battery pack, this itself being charged from both regen in use and the external electrical supply when connected at home. Is that correct? If so, why is it that when the vehicle is connected to a charger, fully charged and able to call upon power from the domestic supply, that the PCM will not work beyond 15 mins? Surely the constant availability of electricity should mean that the PCM works indefinitely in that scenario?

I suspect there is some flaw in my thinking on account the Taycan won’t allow you to use the PCM for longer than 15 mins while stationary. So, I’d be grateful if someone in the know could shed some light on this.

12v is only topped up when car is powered on hence why it will shutdown even if connected to your EVSE and not powered on.

 

[HerrCooles]

The reason why is to save energy in case you forgot to switch off the car.

 

[Docjonday]

12v is only topped up when car is powered on hence why it will shutdown even if connected to your EVSE and not powered on.

Thanks, but my point was it still shuts down after 15 mins of both connected to EVSE and powered on.

 

[Midlifecrisis]

Presumably they just set it up that way without really considering that you might want to sit in the car like this, listening to the radio on your drive. I can’t see that there is a “good” reason

 

[Brassfactory]

The reason why is to save energy in case you forgot to switch off the car.

This. Whether it’s good or not is subjective, but like most consumer products there are some aspects that are adjustable and some that aren’t.

 

[W1NGE]

Thanks, but my point was it still shuts down after 15 mins of both connected to EVSE and powered on.

If you mean powered on and connected to an EVSE whilst charging then that's weird - understand if no charging in progress, it should shutdown.

 

[W1NGE]

Presumably they just set it up that way without really considering that you might want to sit in the car like this, listening to the radio on your drive. I can’t see that there is a “good” reason

Mine doesn't shutdown if powered on and charging is in progress - pretty sure on that.

 

[Fish Fingers]

Presumably they just set it up that way without really considering that you might want to sit in the car like this, listening to the radio on your drive. I can’t see that there is a “good” reason

There's the answer right there.
Most Porsche engineers must be single men....not married.
Haven't understood that it may sometimes need to be used as an escape pod/safe place.
?

 

[kanthai]

You can make the car run indefinitely by shift to neutral position instead of park and engage the e-brake in vehicle settings to prevent the car rolling away. However, you cannot shift the transmission when charging and it will shift to park immediately when you open the driver's door.

 

[Alex74]

Also, what if you want to go to a drive in movie in open air? It doesn’t work.
that’s why you need more then one car.

 

[bah1590]

Mine doesn't shutdown if powered on and charging is in progress - pretty sure on that.

I agree. I have sat at a charging station with the PCM on for over a half hour and it didn't shut down.

 

[tbinmd]

Have also sat in the garage with the car on and nothing shuts off. Plus doing the same thing at a public charging station. Nice to have heated/massaging seats while waiting.

Is your charger on a timer and not actually providing power to the car?

 

[Docjonday]

If you mean powered on and connected to an EVSE whilst charging then that's weird - understand if no charging in progress, it should shutdown.

That’s exactly what I mean and why I thought it so strange as to post this thread.

 

[Docjonday]

Have also sat in the garage with the car on and nothing shuts off. Plus doing the same thing at a public charging station. Nice to have heated/massaging seats while waiting.

Is your charger on a timer and not actually providing power to the car?

So, I’m the circumstances I describe, the car is connected to power but is fully charged to the threshold I have set (80%). Hence, if the battery charge was to dip below 80%, due to me using the media player, it could immediately restart the charging process and call more power off the grid to reach 80% again.

To me, it makes no sense that the car switches off after 15 mins.

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