BEST advice for procedures to leave Taycan undriven ~ 6 weeks?

[WindOfTheDog]

Hi,

A link to valid advice this forum agrees with would be great!

In the past with my Rivian - I left it plugged in the garage and set to 50% SOC. Was told that HV battery would service the 12V. Came back to all OK.
Now I'm reading Taycan should not be plugged in, and recommendation on what % SOC it should be left with varies. I buy Porsche trickle charger for 12V?

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[WindOfTheDog]

Hi,

A link to valid advice this forum agrees with would be great!

In the past with my Rivian - I left it plugged in the garage and set to 50% SOC. Was told that HV battery would service the 12V. Came back to all OK.
Now I'm reading Taycan should not be plugged in, and recommendation on what % SOC it should be left with varies. I buy Porsche trickle charger for 12V?

Saw rec for 30% SOC in hot weather if car is not being used. Now I'll dig into the trickle charger rec.

 

[chun]

Mine was perfectly fine at 60% plugged in for 3 months; with pre-conditioning scheduled daily; which would also trigger the 12V charging, and then in the night it would top back up to 60% if needed

That’s how I was told to do it by porsche, but some things have changed since.

The car is supposed to top up the 12v by itself now, without preconditioning. The 12V is also supposed to “leak” much less, since app pings no longer trigger a live check on the actual car - just to the server (the server is updated if something changed to the car automatically)

In general it’s not good to keep the battery very low or very high in terms of charging for more than 12-24h.

 

[WindOfTheDog]

Mine was perfectly fine at 60% plugged in for 3 months; with pre-conditioning scheduled daily; which would also trigger the 12V charging, and then in the night it would top back up to 60% if needed

That’s how I was told to do it by porsche, but some things have changed since.

The car is supposed to top up the 12v by itself now, without preconditioning. The 12V is also supposed to “leak” much less, since app pings no longer trigger a live check on the actual car - just to the server (the server is updated if something changed to the car automatically)

In general it’s not good to keep the battery very low or very high in terms of charging for more than 12-24h.

Thanks Chun, I appreciate you commenting on how you handled it.

Dr. Dahn in this post said 30% storage in hot weather is easiest on battery.
https://www.taycanforum.com/forum/t...tery-degradation-data-by-taycan-owners.12815/

Trickle charger was older car, old news?
Unplugged was old news?
They told me not to wake up my Rivian.
OK I'll check with a dealer then.

 

[kern417]

Just make sure the battery recall is done. One of the reasons was to prevent issues with leaving the car sitting for a while.

https://www.taycanforum.com/forum/t...ing-parked-for-long-period-jan-12-2026.33336/

 

[WindOfTheDog]

Just make sure the battery recall is done. One of the reasons was to prevent issues with leaving the car sitting for a while.

https://www.taycanforum.com/forum/t...ing-parked-for-long-period-jan-12-2026.33336/

Thank you!
He said no open recalls
At risk of being a PITA I will ask about this specific recall.
I am going to ask for current Porsche recommended procedure on storage and see what the say

 

[WindOfTheDog]

Mine was perfectly fine at 60% plugged in for 3 months; with pre-conditioning scheduled daily; which would also trigger the 12V charging, and then in the night it would top back up to 60% if needed

That’s how I was told to do it by porsche, but some things have changed since.

The car is supposed to top up the 12v by itself now, without preconditioning. The 12V is also supposed to “leak” much less, since app pings no longer trigger a live check on the actual car - just to the server (the server is updated if something changed to the car automatically)

In general it’s not good to keep the battery very low or very high in terms of charging for more than 12-24h.

Chun I wanted to add how cool you auto and background is!

 

[Tooney]

https://static.nhtsa.gov/odi/tsbs/2022/MC-10209809-0001.pdf
https://static.nhtsa.gov/odi/tsbs/2022/MC-10209808-0001.pdf

 

[WindOfTheDog]

https://static.nhtsa.gov/odi/tsbs/2022/MC-10209809-0001.pdf
https://static.nhtsa.gov/odi/tsbs/2022/MC-10209808-0001.pdf

Thanks

 

[gnr3312]

https://static.nhtsa.gov/odi/tsbs/2022/MC-10209809-0001.pdf
https://static.nhtsa.gov/odi/tsbs/2022/MC-10209808-0001.pdf

Fantastic info as always @Tooney, thank you.

 

[WindOfTheDog]

Thank you!
He said no open recalls
At risk of being a PITA I will ask about this specific recall.
I am going to ask for current Porsche recommended procedure on storage and see what the say

Workshop Campaign = Recall. Ridiculous need to learn this company nomenclature. Recalls are VIN based, this car never needed it, if I follow storage procedure and 12V is dead when I get back, I'm sure I'll post!

 

[Tooney]

Pay attention to these two items from the TSB:

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