Trickle Charger for Taycan 12v battery?

[Option7]

This was the advice given some time ago. Not sure how this now would be reduced to 1 week.

There has been a lot of discussions on here about the way the Taycan charges the 12 volt battery and the cycles. But leabing the car for 1 week should not cause any issues whatsoever!

Thank you so much for this additional service bulletin!
I didn't see this one but it shows the software update increased the level of charging of the 12v battery to increase the time the vehicle can sit in storage mode. It also is careful to identify if you connect to the car too often while it's in storage will wake up the vehicle's electronics and draw down the 12v battery more quickly.
The fact the vehicle can now safely sit for 3 months with the new software updates puts the 12v charging issue to bed. Thanks!
I just confirmed with my Porsche dealer this morning that Porsche's official position on 125v charging is still:
"125v charging should only be done in an emergency for no longer than 12 hours. Daily 125v charging should never be done.

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[j.w.s]

Thank you so much for this additional service bulletin!
I didn't see this one but it shows the software update increased the level of charging of the 12v battery to increase the time the vehicle can sit in storage mode. It also is careful to identify if you connect to the car too often while it's in storage will wake up the vehicle's electronics and draw down the 12v battery more quickly.
The fact the vehicle can now safely sit for 3 months with the new software updates puts the 12v charging issue to bed. Thanks!
I just confirmed with my Porsche dealer this morning that Porsche's official position on 125v charging is still:
"125v charging should only be done in an emergency for no longer than 12 hours. Daily 125v charging should never be done.

Daily 120V charging is bad because it pushes residential 120V circuits too hard. Any risk is due to the charger, not the car.

 

[Option7]

I went through this entire exercise with my 2021 Turbo S. All of it is totally unnecessary. I left my car in a air conditioned garage in Florida after charging the big battery to the suggested 85 % ( more on that later)
anyway after seven months the charge went down to 78% and everything worked fine. Obviously the 12v lithium battery IS supported by the big battery. You could alternatively leave it plugged in the whole time but I didn like that idea regards fire etc. AND it is not necessary.

Regarding the 85 % limit to preserve the life of the big battery. That is also incorrect. Turns out that when you charge the battery to 100% , the software still limits it to 85% of max automatically. So now you can the increase range by 15%!

I have owned ten Porsches including a 962, a super cup car , a cup car , a 356, a cayenne turbo, a boxster S , a GT3RS. etc. My Taycan is fun fast and really kind of stupid. It is VERY UNCOMFORTABLE TO GET IN AND OUT BECAUSE OF THE A PILLAR !
The electronics are undependable like most computers. The Range makes it suitable ONLY as a commuter vehicle. I have done the trips and they can be a nightmare.

Mr Toyota has it right A HYBRID !
The totally EV experiment has failed at multiple levels.
By the way if you want a Taycan buy a used 4S with the big battery….you can pick one up for very little. Buying a Turbo or Turbo S is a waste of money.

so there you have my three year review. I should have gotten a 911 Turbo S or a GT3. Hope this helps .It takes time to figure out EVs and the dealer is often not much help. In general the dealer is only worth it for warranty items . They are only capable of replacement…really can’t fix anything. As far as EV knowledge they are very deficient.

I am surprised so many like their Taycan?

Fantastic information! Thank you so much. Luckily for my wife and I this is one of 4 vehicles so it won't likely get driven more than 150 miles per week and sit for weeks to months when we travel.
Your real world experience has been extremely helpful.

 

[Option7]

Hey troll, we’ve already talked through all of this old misinformation you are bringing up. There are plenty of threads for you to read through on this forum if you are interested in the slightest. Good luck with your Taycan if you actually even have one.

What an ass. You have a problem with someone asking legitimate questions in this forum as a new owner of a Taycan for a week seeking to determine if numerous Taycan reports of fire & battery issues have any merit and if so were addressed by Porsche. I appreciate the inputs of helpful people on this forum but could care less for judgmental boneheads like yourself who are not happy with their lives so they lash out at others for no good reason. Have a nice day!

 

[Option7]

Daily 120V charging is bad because it pushes residential 120V circuits too hard. Any risk is due to the charger, not the car.

That is true but Porsche still advised me to not charge at 125v for more than 12 hours in emergencies only regardless if I use a dedicated 20A circuit with zero issues of overload. They only advise the use of level 2 charging at 220V -250V for daily charging. They told me this morning "No Exceptions For 125V Charging" it is not good for the car.
I asked what he meant by "125v charging is not good for the car if used daily even for less than 12 hours a day."
He replied "all I can say is don't do it"
I would love to know exactly why but I'm ok with him telling me Porsche officially does not support daily charging at 125V under any circumstances.
Porsche knows best so I'm not going to argue with them on this.

 

[Vercingetorix]

That is true but Porsche still advised me to not charge at 125v for more than 12 hours in emergencies only regardless if I use a dedicated 20A circuit with zero issues of overload. They only advise the use of level 2 charging at 220V -250V for daily charging. They told me this morning "No Exceptions For 125V Charging" it is not good for the car.
I asked what he meant by "125v charging is not good for the car if used daily even for less than 12 hours a day."
He replied "all I can say is don't do it"
I would love to know exactly why but I'm ok with him telling me Porsche officially does not support daily charging at 125V under any circumstances.
Porsche knows best so I'm not going to argue with them on this.

Porsche does not know best when charging in the USA. That’s why they hobbled their charger to 20 amps. They can’t afford the fire liability if used at 40 amps because of the crappy cord they supplied with it. I charge daily with 120v and have had no issues in 2.5 years. They are simply playing it safe.

 

[WasserGKuehlt]

Well, at least now we have the facts directly from Porsche stating they don't advise charging at 125v for more than 12 hours and only in an emergency. Daily use should be avoided.
Pretty simple.

So your initial concern regarding the 12V battery was addressed? Or did you mean 12.5V above? Trying to understand..

For those making wise cracks, I'm sorry you are not smart enough to know or interested enough to actually find the facts. Just saying the whistleblower was wrong about everything he/she said is just ignorant. Some of his claims have been confirmed by this bulletin saying charging batteries at 125v for long periods is dangerous.

We're not trying on purpose to make wise cracks, it just happens. I can attest that most members of this forum (except for trolls) are serious posters, trying to help one another. For instance, we had a poll on whether the Taycans of forum members were on fire, which saw a good participation with honest, helpful answers. That's how we know that most Taycans are not on fire/do not pose a fire hazard - we're not being ignorant about the whistleblower's claims, we addressed them with data.

I usually don't blindly buy anything without investigating, even when there are rumors. It never hurts to be safe rather than sorry. In this case I did trust my Porsche dealer but they said nothing about the issue with daily 125v charging. I will address this with them tomorrow.

Yeah, don't trust Porsche dealers, those guys are not well versed in the intricacies of daily 125V charging. I hope you didn't have to pay them for the car?

I analyze complex systems for a living, far more complex than any car, in fact the most complex systems on earth, so I can get to the bottom of any technical issue given a few days and talking to right, well informed people.

This is excellent news, we've been waiting for a long time for someone with this extraordinary skill set. There are many, many problems with these cars, and since most of us around here work in telemarketing it's difficult to get to the bottom of issues. Some of us end up taking the cars to the dealers (gasp). Welcome!

 

[Hirschaj]

What an ass. You have a problem with someone asking legitimate questions in this forum as a new owner of a Taycan for a week seeking to determine if numerous Taycan reports of fire & battery issues have any merit and if so were addressed by Porsche. I appreciate the inputs of helpful people on this forum but could care less for judgmental boneheads like yourself who are not happy with their lives so they lash out at others for no good reason. Have a nice day!

Try rereading your entire approach from your first post in this thread and then see if you can figure out why l’m intentionally being an ass to you.

 

[bsclywilly]

I analyze complex systems for a living, far more complex than any car, in fact the most complex systems on earth, so I can get to the bottom of any technical issue given a few days and talking to right, well informed people.

This is nothing to brag about. 50% of the married population could say the same.

 

[Option7]

Porsche does not know best when charging in the USA. That’s why they hobbled their charger to 20 amps. They can’t afford the fire liability if used at 40 amps because of the crappy cord they supplied with it. I charge daily with 120v and have had no issues in 2.5 years. They are simply playing it safe.

Yes they are. Better safe than sorry. It appears the majority of the fires have happened with multiple day 125v charging so I will follow their advice since I don't want to take any chances.
How many miles do you get per hour of charging at 125v? I'm not sure if what it is for 8A or 10A that the Porsche charger puts out but I have also seen other chargers which put out 15A or 16A at 125v which are supposed to work with the Taycan. Which charger are you using and at what current? Very much appreciate your feedback. Thanks

 

[Option7]

So your initial concern regarding the 12V battery was addressed? Or did you mean 12.5V above? Trying to understand..


We're not trying on purpose to make wise cracks, it just happens. I can attest that most members of this forum (except for trolls) are serious posters, trying to help one another. For instance, we had a poll on whether the Taycans of forum members were on fire, which saw a good participation with honest, helpful answers. That's how we know that most Taycans are not on fire/do not pose a fire hazard - we're not being ignorant about the whistleblower's claims, we addressed them with data.


Yeah, don't trust Porsche dealers, those guys are not well versed in the intricacies of daily 125V charging. I hope you didn't have to pay them for the car?


This is excellent news, we've been waiting for a long time for someone with this extraordinary skill set. There are many, many problems with these cars, and since most of us around here work in telemarketing it's difficult to get to the bottom of issues. Some of us end up taking the cars to the dealers (gasp). Welcome!

It does appear after my discussion with my Porsche service tech that it is possible that their standard charging module could overcharge a battery cell to cause a runaway condition if you use low & slow charging at 125v. He is told by his management that 125v charging is only for emergencies like their service bulletin says. He said there is no safe way to use 125v charging on a daily basis even if it was for less than 12 hours per day.
He did say the Porsche software would know what voltage you charge at, what time, for how long and if charging is done on a daily basis. I asked if charging every day at 125v would void my warranty. He said no because this requirement was not present when my car was sold/built. So I assume Porsche is warning customers not to charge at 125v since they would be on the hook for damages should a vehicle they sold before taking this new position where 125v daily charging is forbidden.

 

[Option7]

Try rereading your entire approach from your first post in this thread and then see if you can figure out why l’m intentionally being an ass to you.

I have but remember I was trying to make sense of all the issues identified on the Taycan batteries. One by one with information from people on the site which have had experience with this issues I was able to determine what issues are still present & which ones were resolved by Porsche.
Simply saying everything I was seeing is old news and not credible was both inaccurate and unhelpful since Porsche did take steps over the last 2 years to correct or at least improve these issues. I did verify that there is additional capacity in Porsche batteries which makes it easier for Porsche to sell upgrades to range or performance without requiring a new battery pack. Porsche has the option to access an unused cell or cells to repair a car which is just a good design since taking apart these batteries is dangerous and it can only be done in a special location with fire control systems in place and the tech must wear a "bomb" suit when working on these modules. He said it is common for them to do this when a vehicle has been in an accident and they are unsure if any of the cells have be breached so air can get in and lead to a runaway condition if the humidity in the air is high enough to cause an initial arc to start the chain reaction.
With this in mind Porsche is just being smart to fix a bad cell by reconfiguring the remaining cells. I have not got a cost to replace a cell yet outside of warranty in terms of parts & labor but I heard in Europe the cost to repair/replace a cell is 600Euro.
Based on that number, there are 12 cells per module & there are 33 modules so each module would cost 4800 Euro which actually sounds about right. It may be a bit expensive but not bad if you simply need one cell here or there in multiple modules to get your range back. Time will tell how many cells need to be replaced during warranty and after warranty.
Anyone with experience having paid for cell repair/replacement I would love to hear what the cost ended up being and what happened to your range.

 

[Option7]

So your initial concern regarding the 12V battery was addressed? Or did you mean 12.5V above? Trying to understand..


We're not trying on purpose to make wise cracks, it just happens. I can attest that most members of this forum (except for trolls) are serious posters, trying to help one another. For instance, we had a poll on whether the Taycans of forum members were on fire, which saw a good participation with honest, helpful answers. That's how we know that most Taycans are not on fire/do not pose a fire hazard - we're not being ignorant about the whistleblower's claims, we addressed them with data.


Yeah, don't trust Porsche dealers, those guys are not well versed in the intricacies of daily 125V charging. I hope you didn't have to pay them for the car?


This is excellent news, we've been waiting for a long time for someone with this extraordinary skill set. There are many, many problems with these cars, and since most of us around here work in telemarketing it's difficult to get to the bottom of issues. Some of us end up taking the cars to the dealers (gasp). Welcome!

I just came back from my dealer and addressed this my salesman. He had never seen the Porsche Service Bulletin talking about 125v charging only in emergencies. I wasn't surprised. They don't want to lose any sale. What do you expect when a sales guy only makes a maximum of $300 per car he sells regardless if it is $30K or $300K.
My dealership and many others are trying to move to the Tesla model where there is no need for a salesman since the young folks are happy to purchase a car on an app rather than a person.
I find this forum extremely valuable. In just two days I was able to get to the bottom of every concern brought up by all the news reports on the Taycan. Some had merit, which Porsche recognized & addressed. Some were misleading based on old information and some are still a question mark until Porsche decides to address them in detail. This forum is a great watchdog group for people like me that have had a Porsche Boxster for 23 years but was new to EVs as of 4 days ago.
Thanks to the people on this forum I was able to get fully up to speed in 3 days which I very much appreciate.

 

[Option7]

This is nothing to brag about. 50% of the married population could say the same.

Being married doesn't help if you aren't and engineer, physicist or scientist. The understanding of the Porsche charging system design & architecture was not design by people with the sole background that they are married. LOL!

 

[bsclywilly]

Being married doesn't help if you aren't and engineer, physicist or scientist. The understanding of the Porsche charging system design & architecture was not design by people with the sole background that they are married. LOL!

Don’t worry, you’ll figure it out in a few days.

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