Charging when not in use for 7+ days

[castlg]

If the car is not being used for at least a week. Should it be left connected to the home charger at 50 percent max charge?

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[daveo4EV]

If the car is not being used for at least a week. Should it be left connected to the home charger at 50 percent max charge?

it won't hurt one way or the other 45 to 60+ days is when you want to be concerns - and even then - it's mostly about not storing it in direct sunlight and nearly full/empty battery…

leave it plugged in - and set it to not charge above 80% (or less)

7 days is not a concern.

https://www.macanevowners.com/forum/threads/faq-question-im-a-new-ev-macan-owner-im-stressed-about-the-battery….17629/

NOTE: just because it's plugged in doesn't mean it's charging - these are not trickle chargers or $45 RC toys - the car will charge the battery when it needs to - but once it's at it's set SOC - the car no longer charges and will just sit there waiting for you to come home - there is no impact to the battery from leaving it plugged in - because there is no power flowing once the battery is at it's set/target SOC…

 

[castlg]

it won't hurt one way or the other 45 to 60+ days is when you want to be concerns - and even then - it's mostly about not storing it in direct sunlight and nearly full/empty battery…

leave it plugged in - and set it to not charge above 80% (or less)

7 days is not a concern.

https://www.macanevowners.com/forum/threads/faq-question-im-a-new-ev-macan-owner-im-stressed-about-the-battery….17629/

NOTE: just because it's plugged in doesn't mean it's charging - these are not trickle chargers or $45 RC toys - the car will charge the battery when it needs to - but once it's at it's set SOC - the car no longer charges and will just sit there waiting for you to come home - there is no impact to the battery from leaving it plugged in - because there is no power flowing once the battery is at it's set/target SOC…

And is there any concern about the 12V battery?

 

[daveo4EV]

And is there any concern about the 12V battery?

the answer should be "no"

in the real world there are issues - but rarely over a 7 day period 20+ days or more and some people have had issues with the 12V (Taycan community, I'm not aware of any Macan EV 12V issues but it's a newer car)

below feedback is based on Taycan forum conversations…YMMV - Macan might have a different 12V strategy vs. Taycan - only Porsche internally knows…

the system is supposed to maintain the 12V battery as long as the vehicle is plugged into a working EVSE and main battery is above a certain % threshold

there are numerous threads on 12V, how long it can last, will it die, do I need to hook it up to a trickle charger…

it all depends how defensive you want to be…

if everything is working properly there should be no issue for even up to 30 days for 12V battery…

YMMV

at the end of the day these cars are designed to behave to normal expectations of normal automobiles in the real world - if you're comfortable leaving your ICE vehicle for 7 days you should be comfortable leaving your EV for 7 days…the failure rate on the 12V is going to be about the same for the EV as it is on ICE - i.e. no-one and no-product is immune to a problem - but that's not the expectation.

 

[RickDCMD]

Just came from a trip of 12 days, I left the Macan with 71%, today 3 days after arrived I took the car for a spin, still have 70% no phantom drainage, amazing and the small battery 14V. I don’t think people should be worried about leaving the can unplugged for days.

 

[JerShanMan39]

I went away for 5 days and my battery was at about 35%. When I got home, the car was completely dead. I couldn't even get into it as the locks wouldn't unlock with my key fob or the app. I had to call roadside service and they came and boosted the 12v battery to give it some charge. Evenutally we were able to pop the frunk and charge the battery from there which allowed us to unlock the doors and get into the vehicle and allow me to open the chargeport door. I charged overnight and everything seemed ok the next day, except all my settings had reset and my windshield wiper motor didn't work anymore. Had to be reset at the dealer.

Long story short, it was a huge pain in the ass, so I'd recommend you leave it plugged in while you are away.

 

[USMA81]

I’m not sure where I saw this, inside the Porsche world or in the greater EV community. It’s best for longer term storage (7 days isn’t that, but whatever), leave the battery in the 35-ish to 50-ish range.

 

[CandianPorsche83]

I went away for 5 days and my battery was at about 35%. When I got home, the car was completely dead. I couldn't even get into it as the locks wouldn't unlock with my key fob or the app. I had to call roadside service and they came and boosted the 12v battery to give it some charge. Evenutally we were able to pop the frunk and charge the battery from there which allowed us to unlock the doors and get into the vehicle and allow me to open the chargeport door. I charged overnight and everything seemed ok the next day, except all my settings had reset and my windshield wiper motor didn't work anymore. Had to be reset at the dealer.

Long story short, it was a huge pain in the ass, so I'd recommend you leave it plugged in while you are away.

Very odd. I’ve been away for 11 days and left it at 50% as per instructed in manual. I also plugged in my car.

For some reason it looks like there’s an issue with charger as it’s been stucked on “initializing” and not charging. However my battery is down to 35%. That’s a bit weird.

 

[Petzi]

i think there is confusion about the 100kw battery and the 12v battery.
the 100kw has no drainage. the 12v battery which opens the doors has the same capacity as in any ICE and will NOT be charged by the 100kw battery (for reasons i can not comprehend). so especially people that run aftermarket dashcams aso. there will be significant drainage over a week.

 

[daveo4EV]

i think there is confusion about the 100kw battery and the 12v battery.
the 100kw has no drainage. the 12v battery which opens the doors has the same capacity as in any ICE and will NOT be charged by the 100kw battery (for reasons i can not comprehend). so especially people that run aftermarket dashcams aso. there will be significant drainage over a week.

not if you leave it plugged in - the Macan is supposed to periodically charge the 12V battery if it's not been driven over time…I'm not saying this is flawless - I'm saying that's the plan/goal/intention

 

[TRP]

not if you leave it plugged in - the Macan is supposed to periodically charge the 12V battery if it's not been driven over time…I'm not saying this is flawless - I'm saying that's the plan/goal/intention

That's the way my Mach E works. If it's plugged into the home charger it will maintain the 12v battery. I plug the car in every day whether it needs charging or not and so far I have not had an issue with the 12v. Still on the original one in fact.

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