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

[ChrisFromUK]

My car was built in March 2025 and delivered April 2025 and has always had the 1% / day SoC loss. This has continued after the 28.13 update although since the update the SoC is more erratic but over a few days will always return to the 1%/day loss trend. I'm not sure I see the battery warming. Car lives outside and the battery temp seems to be approximately the average of day and night temps.

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[Fly4ever]

My car was built in March 2025 and delivered April 2025 and has always had the 1% / day SoC loss. This has continued after the 28.13 update although since the update the SoC is more erratic but over a few days will always return to the 1%/day loss trend. I'm not sure I see the battery warming. Car lives outside and the battery temp seems to be approximately the average of day and night temps.

Now I'm getting a bit confused...!! I was hopping I might have found a plausible explanation what is going on here...!!!

 

[Dekord]

As I described a while ago, my Macan is behaving abnormally. It loses about 1% of its energy per day once, and then the battery temperature is 3 to 4 degrees higher than the surrounding area. When it is not losing energy, the battery temperature is the same as the surrounding area. The car is a 2024 model and it did not do this for the first 6 months until the first update. The energy loss occurs in summer and winter, regardless of the outside temperature. However, it does not always lose energy. This occurs completely randomly. It mostly loses it. There are also sudden drops in charge while driving, when the battery is below 60% charge. In reality, the battery is not as discharged as the car shows, because when charging, not as many kW are going into the battery as it should. My wife also has a BMW iX1, which does not experience such anomalies and you can rely on it. I can't rely on my Macan, because I never know how it will behave and it is completely unpredictable. The battery behavior is not normal and you can even stop on the road due to a rapid false drop in charge while driving. This bothers me more than the daily 1% energy loss. Calibration helps, but not for long. After two to three charges, the issue repeats.

 

[byebye]

As I described a while ago, my Macan is behaving abnormally. It loses about 1% of its energy per day once, and then the battery temperature is 3 to 4 degrees higher than the surrounding area. When it is not losing energy, the battery temperature is the same as the surrounding area. The car is a 2024 model and it did not do this for the first 6 months until the first update. The energy loss occurs in summer and winter, regardless of the outside temperature. However, it does not always lose energy. This occurs completely randomly. It mostly loses it. There are also sudden drops in charge while driving, when the battery is below 60% charge. In reality, the battery is not as discharged as the car shows, because when charging, not as many kW are going into the battery as it should. My wife also has a BMW iX1, which does not experience such anomalies and you can rely on it. I can't rely on my Macan, because I never know how it will behave and it is completely unpredictable. The battery behavior is not normal and you can even stop on the road due to a rapid false drop in charge while driving. This bothers me more than the daily 1% energy loss. Calibration helps, but not for long. After two to three charges, the issue repeats.

My September 24 Turbo has got the exact same behavior regarding the BMS and the SoC.
My car is mostly parked in an underground parking at 17/18 C , and the 1% loss appeared after some modules updates on september/october 25 (they were intended to solve my red circle of death problems) and the BMS erroneous behavior with sudden apparent discharges appeared juste after the 28.13 update, around January 26 in my case (Which was, with other fixes, intended to fix my red circle of death).

So I think the @Fly4ever 's reasoning is very aligned with my reality check...

(btw, my Turbo has a big issue related to partial or total loss of power / red circles of death that are definitely not connected to any of the updates, and that Porsche is unable to fix. Can't wait to replace this dangerous car with something else...)

 

[dimaa_6abc]

Left our Macan at 59% for 2 weeks. We are back and it is at 59%. Before, it had a mix of what is reported here, the worst is 1-1.5% SoC drain per day with battery temperature a few degrees higher than the ambient. Guys, do you start getting the issue after a long trip with a few rapid charges in quick succession, or just while driving neat home and slow charging? It seems once the problem is there, it won't go away no matter what you or dealer does. But it my case after another SW update and without rapid charging it went away.

 

[byebye]

Since January 26, no fast charge, only 4,7 kWh slow charge

 

[dimaa_6abc]

Since January 26, no fast charge, only 4,7 kWh slow charge

It might have been enough to have a trip in January. Mine was glitching a long time once this started.

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