Does your Macan EV keep SoC stable when left idle for a week or longer?

[byebye]

Context: my Turbo is at the dealership since 12 days for the red circle of death issues, and related total or partial loss of power.
The loaner I have is an almost new Macan EV In @Petzi conditions (ie: error free, btw a pleasure!)

It has been parked in the same conditions as my turbo, 5 days, idle, underground without 4g/5g:
- my turbo in October 2025 : -5%
- Loaner this week : 0%
(My turbo from 11/2024 to 09/2025: it was 0%, even after 15 days idling...)

Something is wrong with my Turbo...

The simple Macan is a very nice car, very efficient compared to the turbo, the spring suspensions + 20" wheels are so smooth.
I strongly recommend this setup for a DD, there is no lack of power, and this one doesn't cut the power (maybe that's why I'm happy with the simple Macan)

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[dimaa_6abc]

Something is wrong with my Turbo...

And not only with your Turbo. Vote shows 8 people losing 1% per day. With my 4S it is not so good. It had 65% at dealership, drive home, which is 65km, dropped SoC to 51%, while it showed 17kWh/100km consumption. It must have used 11kWh if consumption figures are correct. 65-11=54, this explains why I see 51 - some people report SoC loss when they start driving.

If the dealer fixes your Turbo and SoC loss issue goes away, I would appreciate it if you could share exactly what they did.

the spring suspensions + 20" wheels are so smooth

I think wheels contributed more to the smoothness than steel suspension. Our 4S has air suspension and 20" wheels and it is just great, we can drive through speed bumps almost not braking. I bet your Turbo has 22" wheels?

 

[chaz]

I've been away for 2 weeks so far with it plugged in and charge set to 50%. I see it's been holding 50% when I check on occasion. However, the charging activity status appeared on my lock screen today showing it was charging because it had dropped to 40%. I don't know when it dropped since I do not check the app daily. It did start charging again and now it's back to 50%. Strange that it could have dropped 10% (possibly more) while plugged in. Glitches be glitchin.

 

[dimaa_6abc]

Did you have a situation when either after charging, or some idle time after a drive, SoC raises few %? I often see that when charging to 80%, SoC is 81% or even 82%, and yesterday I got an interesting situation. If I subtract consumption * distance driven from the starting SoC, I will get some figure greater than displayed SoC by good 6-7%. But after it sat for 2 hours, it showed SoC of 3% bigger that when parked. To give some figures so it is easier to understand:

SoC when beginning the drive - 67%
SoC when parked after driving 105 km - 37%
Consumption - 22 kWh / 100km
SoC when starting another drive 2 hours later - 40%

First, 67% - 37%= 30 kWh, how 105 km @ consumption 22 kWh / 100km it could have spent 30 kWh?

How SoC could have gone 37% -> 40%? It got an energy from an ether?

 

[Fly4ever]

Did you have a situation when either after charging, or some idle time after a drive, SoC raises few %? I often see that when charging to 80%, SoC is 81% or even 82%, and yesterday I got an interesting situation. If I subtract consumption * distance driven from the starting SoC, I will get some figure greater than displayed SoC by good 6-7%. But after it sat for 2 hours, it showed SoC of 3% bigger that when parked. To give some figures so it is easier to understand:

SoC when beginning the drive - 67%
SoC when parked after driving 105 km - 37%
Consumption - 22 kWh / 100km
SoC when starting another drive 2 hours later - 40%

First, 67% - 37%= 30 kWh, how 105 km @ consumption 22 kWh / 100km it could have spent 30 kWh?

How SoC could have gone 37% -> 40%? It got an energy from an ether?

My 4S does similarly the same thing as well.Even though I haven't so closely monitored the SoC yet - I just got the car 15 days ago - I noticed more than a couple of times the SoC is slightly increased after a while when the car is parked and unused for short time period.But not after a charging session is completed but rather after a drive, irrelevantly the distance.

I asked a friend with a BYD and he told me his car does it too rather frequently and it's a common thing for him.

 

[krissrock]

this was the first time i've attempted to do this or pay attention to it.
I haven't driven the car for 4 days, haven't accessed the app....nothing. It's cold/snowing - below freezing here. My garage is probably 40's, as that's the usual battery temp it shows when i depart.
I turned off the data on my phone so that it would load the last numbers in the cache...

so over 4 days of inactivity of at low temps, and it only lost 1% of battery (72 > 71%).
So it really makes me wonder for those saying they're losing 1% each day, is it because they're checking the app each day, which is basically turning on many systems in the car...

 

[Fly4ever]

I intentionally left the car for 10 days in my garage before take it out for a ride. Temperatures inside the garage never went below 8-10°C.SOC remained stable exactly where I left it 10 days ago @61%.However after a few 100s meters of driving it went to 60%,but it most likely was because it showed 61% for pretty much time prior leaving the car all those days ago.
Like Kriss I'm also convinced the more the app is used while the car remains parked the most the SOC lost will be.Even though not completely certain I think I also red it somewhere in the manual.

 

[platypus]

Adding my experience - started having this issue in July.

Initial incident

• Left car unplugged at 60% SoC in underground parking garage (valet) with relatively stable temperature (~25°C).
• After 2 weeks, the car had lost 15%. I had never observed this before, despite parking it in the same location for the same amount of time.
• Asked a friend to plug it in, recharged to 60%. It then kept losing 1% per day while plugged in.
• Pre-climate on unlock was OFF.

To me, the only difference between before/after was a dealership visit in June to apply the latest software updates.

First dealer visit in September

• Dealer confirmed the 1%/day drain (dashcam unplugged to isolate)
• Porsche said drain was “within normal range”

Second dealer visit in November (after finding this thread)

• Asked them for deeper investigation
• Porsche said it was due to the low temperatures (despite the issue already happening in Summer).
• Dealer said they couldn’t do more without issue worsening.

Has anyone successfully resolved this with Porsche? Would love advice on next steps!

Thank you

 

[Cogs79]

Second dealer visit in November (after finding this thread)

• Asked them for deeper investigation
• Porsche said it was due to the low temperatures (despite the issue already happening in Summer).
• Dealer said they couldn’t do more without issue worsening.

Has anyone successfully resolved this with Porsche? Would love advice on next steps!

Thank you

Hi,
I haven't been able to open both of my manual charge port doors for the last 6 days or so. The car has been sitting outside with temperatures dropping to as low as -19C, and mostly -10C for most of the time. It was at 77% and still was 77% when I took it to the dealership earlier this morning. I checked the percentage charge almost daily so it was connecting to the car and refreshing the data. So even in cold temperatures, it did not lose much charge. Hope this helps!

Cogs

 

[platypus]

I can still remember when my car’s charge was as stable as yours. Fun times!

 

[pm4s]

Has anyone successfully resolved this with Porsche? Would love advice on next steps!

Mine used to do that but it was a simple fix as we knew the problem, dealer fried an ecu while performing an an update.
The car was undrivable but I monitored it as we were waiting for the ecu to arrive.
The car would not stop waking up which would drain the HV battery.
To see what's causing the drain (there are 100s of modules) the easiest to switch off is Porsche Connect.
Enable Privacy Mode, lock the car, take the key as far as possible and monitor it for a couple of days. Sit beside the car (without the key) and hear if it wakes up. I was to lazy so setup my camera to record. You could clearly hear the contactor for the HV battery closing, ECUs booting up (car waking up) and contactor opening (car sleeping). When I would switch off the 12V trickle charger the 12V battery would go flat after a day.
Anyone saying the HV will keep it from going flat is delusional I remember reading somewhere on here that it does up to 2 times then gives up but no evidence to support it.
I have found only 3 ways to keep it charged, 1) drive the car (even when all screens are dead & the only thing working was the gear selector/brakes/steering/etc.) 2) charge the HV battery, 3) charge the 12V battery.
Btw module arrived from Germany, swapped, car good as new, 0% loss since.
From this experience if I had to guess I would say your update was not 100% successful and probably a module is in an unfinished state and it keeps polling/rebooting/waiting/logging/etc. (all assumptions) it will never rest unless the update is redone.
A piece of advice, if your dealer is useless nothing you say will educate them, need to find a better dealer and when I say better I mean one that can get PAG onboard to solve it otherwise trading/selling/passing/etc. it on is what people end up doing.

 

[rcomeau]

On many EVs, the issue of phantom drain is caused by the computers on the car not shutting down properly, so it is always running, draining the 12V and that causes the car to tap into the HV battery to keep the 12V charged.

I am still lurker here (decided to keep my Jag I-pace a little longer for various reasons) but I think these issues are common to all EVs, so I thought I'd comment anyway...

1: If your HV is dropping 1% per day, the car is not shutting down properly. This can be for many reasons (a module crashes and stays in an ON state until it gets rebooted), some accessory (dash CAM?) stays on etc... On the I-Pace, one could monitor the hazard light button, as it stays lit until the car fully shuts down (usually ~15min), so if it stayed on, something failed to shut down. Does the Macan have some similar indicator?

2: If your 12V is getting drained, something is wrong. I doubt the car only tries a couple of times to maintain the 12V then arbitrarily gives up. This makes no sense (why have all the hardware/software in place and then only half heartedly do the job?). Many EVs have had many issues with the maintenance of the 12V battery and these weren't by design of the manufacturers, but due to failure of a component/software. Given that EVs have been around a while, a 12V drain is more likely a component failure than design flaw. Almost certainly not intended.

 

[platypus]

@pm4s super helpful, thank you. I’ll ask my dealership to investigate further, and maybe retry updates. As for finding a good dealership, I’m open to recommendations in the NYC area! I’ve tried a few and have had nothing but mediocre experiences.

@rcomeau thanks as well, indeed I’m quite sure at this point there is something not shutting down properly, but it doesn’t look like the dealership has managed to find what it is for now. I’m not aware of a visual indicator that the car is awake, but I’ll research this. I suspected my dashcam (Blackvue with external battery) but they reproduced the issue with the dashcam off, and I didn’t have the drain before, when the dashcam was already there.

 

[rcomeau]

Is there a way to do a reset of the system short of disconnecting the battery? Not sure if I'd go this far, but disconnecting the battery and reconnecting it (or doing a simpler reset), then leaving the car for a few days might reveal something?

 

[krissrock]

if you're checking the SoC everyday, you're causing the drain each time.
so try only checking it once/week....

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