Trickle Charger/Battery Tender for 2024 Taycan GTS

[skudinnit257]

I will not be driving my car for about 10-days and want to make sure I don't have a dead 12v battery at the end of the period. Does anyone have any recommendations? If I leave my 240v charger hooked up with the appropriate profiles/timers will that do the job or do I need something else?

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[Vercingetorix]

Knowing what I know now this is what I have bought for my trailer. Time to join the 21st century with Bluetooth technology.

1. Lithium Ion compatible
   Compatible with Li-ion (LiFePO₄) batteries; when the integrated LI-ION charge mode is selected the charge cycle settings are altered to suit.
   If the charger is connected to a battery where under voltage protection (UVP) has tripped, the Blue Smart IP65 Charger range will automatically reset UVP and start charging; many other chargers will not recognise a battery in this state.
   Warning: Do not charge Li-ion batteries if the battery temperature is below 0°C.

https://www.hodgesmarine.com/vicbpc...GjtoMEMtkRf80dxwOzCp8gdguoHVuHbsSb_mA7Q&gQT=1

 

[W1NGE]

I will not be driving my car for about 10-days and want to make sure I don't have a dead 12v battery at the end of the period. Does anyone have any recommendations? If I leave my 240v charger hooked up with the appropriate profiles/timers will that do the job or do I need something else?

For 10 days you don't need to do anything. For 10 months then follow the laying up procedure in the Owner's manual.

 

[SergeyIndy]

For 10 days you don't need to do anything. For 10 months then follow the laying up procedure in the Owner's manual.

I agree. No issues with me leaving the car for 10 days at 50% SoC.

 

[anonymouse]

For 10 days you don't need to do anything. For 10 months then follow the laying up procedure in the Owner's manual.

That is indeed sound advice ... except that my car’s 12V battery went flat after 9 days over Christmas and we had to get Porsche assist out this afternoon!

 

[Tooney]

TSB: Parking or Storing the Taycan

 

[Watchesandburgers]

Leaving the car plugged into your EVSE (110v or 220v) is the proper thing to do for any extended time away from driving.

 

[W1NGE]

That is indeed sound advice ... except that my car’s 12V battery went flat after 9 days over Christmas and we had to get Porsche assist out this afternoon!

What was the root cause?

 

[f1eng]

For 10 days you don't need to do anything. For 10 months then follow the laying up procedure in the Owner's manual.

That is what I thought until yesterday.
9 days after I last charged and drove it (short journey though) my 12V was so flat I could not even unlock the car.
The Porsche technician who came out (because the emergency key didn't unlock the door because I didn't want to break it - the technician said it was unusual and he thought he might break it, garage checking now) said the HV battery does not charge the 12V when off - I thought it did but maybe only a few times.

Anyway the whole complicated procedure was a complete embuggerance. Electric latches and concealed key hole all pointless bollox on a car IMO. Not being able to drive a car because some pointless embellishment doesn't work

 

[W1NGE]

That is what I thought until yesterday.
9 days after I last charged and drove it (short journey though) my 12V was so flat I could not even unlock the car.
The Porsche technician who came out (because the emergency key didn't unlock the door because I didn't want to break it - the technician said it was unusual and he thought he might break it, garage checking now) said the HV battery does not charge the 12V when off - I thought it did but maybe only a few times.

Anyway the whole complicated procedure was a complete embuggerance. Electric latches and concealed key hole all pointless bollox on a car IMO. Not being able to drive a car because some pointless embellishment doesn't work

That is a shocker for sure and after almost 5 years you’d think this type of issue had been resolved. HV should keep the 12v charged but there is a finite number of times it will do this - I think there is a detailed post on this with excerpts from a TSB from 18 months ago.

Do you think there was something not powering off when the car was locked and had gone to sleep or more likely, a failing 12v?

I’d best go and check my own car - not used in a few days now and we have a lot of snow and so the ambient is low.

Keen to know what the root cause was when known.

Happy New Year!

 

[JohnPM]

Note that the emergency key has to be turned in the opposite direction to what the manual shows for UK cars.

 

[f1eng]

That is a shocker for sure and after almost 5 years you’d think this type of issue had been resolved. HV should keep the 12v charged but there is a finite number of times it will do this - I think there is a detailed post on this with excerpts from a TSB from 18 months ago.

Do you think there was something not powering off when the car was locked and had gone to sleep or more likely, a failing 12v?

I’d best go and check my own car - not used in a few days now and we have a lot of snow and so the ambient is low.

Keen to know what the root cause was when known.

Happy New Year!

Me too.
Happy New Year to you too!

 

[Gino]

I will not be driving my car for about 10-days and want to make sure I don't have a dead 12v battery at the end of the period. Does anyone have any recommendations? If I leave my 240v charger hooked up with the appropriate profiles/timers will that do the job or do I need something else?

I unfortunately can’t install 220 in my garage due association restrictions.
When we go away for 14-21 days we just make sure we leave the car with at least 50% to 55% minimum SOC since the HV Battery will keep the 12V(actually 13.5v) battery charged.
The most I have ever seen my SOC drop over a week or two has been 1-2% so leaving the car unplugged at 55% should never have any issues except when the 12V battery begins to fail. When lithium batteries fail they can just fall off a cliff so I’m not sure what the life of these batteries will be. Mine is 3 years old with no issues. I’m hoping it lasts at least to the end of the main battery warranty.
Since my free charging plan ends this month I will begin using my 120V charger on a timer every night for 8 hours which will serve two purposes. 1) It will always keep the main battery above 50% or on its way to 50% and eventually to full charge over a few days. 2) It will put at least 30 to 50 kWh per evening at 120V which is more than enough charge for our use of no more than 150 miles per week.
I’m hoping I can set my 120V charger or my vehicle to stop charging at 85% but the few times I set up the 85% limit it still charged to 100% anyway when it was at Porsche for service and they had it on their L2 charger.

 

[simcity]

Note that the emergency key has to be turned in the opposite direction to what the manual shows for UK cars.

Yep. I was about to get the pliers out...before I tried that ?

 

[f1eng]

When we go away for 14-21 days we just make sure we leave the car with at least 50% to 55% minimum SOC since the HV Battery will keep the 12V(actually 13.5v) battery charged.

I didn't use the car for 9 days and it had 78% SOC but a sufficiently dead 12V battery for even the central locking not to work.
The life of the 12V is supposed to be the life of the car, totally different to the poor life of lead acid batteries.

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