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

[platypus]

Unfortunately this didn’t do it for me. I turned off the battery conservation feature a few months ago after the 1% drain started, and it made no difference.

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[TurboSpain]

Unfortunately this didn’t do it for me. I turned off the battery conservation feature a few months ago after the 1% drain started, and it made no difference.

Ok. Did you notice any difference between the ambient temperature and the battery temperature?

 

[TurboSpain]

Yes, I'd say it matches the outside temperature more or less. At least it's not recognizable that it's way warmer or colder.

Without BMS intervention, the temperatures should be the same after a few hours.

A few degrees difference means energy is being added for cooling or heating. How much? I don't know.

I'll continue testing for a few more days and will report the results.

 

[craz8]

I think it takes a little longer than a few hours for the pack to lose temperature - it is a very dense thing with a high thermal mass, but your point on the extra temperature in the battery is a good one as an indicator of the work being done by the BMS

I think that the 1% drain is related to the BMS not getting to a stable state and stopping its work, so every night it finds work to do. My BMS reset from a few weeks ago did NOT stop me losing charge over time, but I think these are related problems of the software being confused

 

[TurboSpain]

I think it takes a little longer than a few hours for the pack to lose temperature - it is a very dense thing with a high thermal mass, but your point on the extra temperature in the battery is a good one as an indicator of the work being done by the BMS

I think that the 1% drain is related to the BMS not getting to a stable state and stopping its work, so every night it finds work to do. My BMS reset from a few weeks ago did NOT stop me losing charge over time, but I think these are related problems of the software being confused

Yes, that's right, lowering the temperature by 5 degrees to match the ambient temperature can take approximately 15 hours.

This graph, which assumes a mass of 500 kg, can serve as a reference.

For example, assuming a garage with a constant temperature of 15 degrees,
if after 10 hours the temperature is still 3 or 4 degrees above the ambient temperature, it means that energy has been used to heat the battery.

 

[craz8]

Today, I lost no SOC between Saturday and Tuesday. Gah! (battery at ambient temperature on startup)

Weirdly, I DID lose 3% between noon and 3:30 whilst parked at an appointment.

Today, I also had weirdness with the route planner for a 1 mile trip showing an arrival SOC 10% lower than the current SOC. (I was playing with maps today, and voice commands to set routes)

 

[Reno]

“EVowner” Did you take some pictures of your Porsche Macan so the rest of us can see it for ourselves?

 

[EVowner]

I have many pictures, but I honestly dont see added benefit of posting them here. Long story short more than a month ago I left my car at service center for a week so they can properly look at all the issue that I reported. After a week they handled me back car with statement diagnostic was reporting issue with HV system. Diagnostic also showed SoH 91% after 6 months/8k kms with car being charged 98% at home which even the technician confirmed as not being normal. They rebalanced battery (this procedure was done on my car multiple times already) and claimed issue was fixed. Upon arriving home car dropped 12% of SoC in 10 hours.

Car was towed back to service center where it spent more than a month. They gave it back to me last week with statement that they multiple times rebalanced battery again and now it is fixed. They even provided me with certificate stating that SoH is now 100%. Funny enough when they handled me the car they stated that it is charged to 100%, but when technician disconnected it from charger in front of me it was already showing 99% (luckily also technician recorded it)... After few days of driving car seems to be again starting to drop 1% SoC in a matter of hours (saw it happen already 3 times in a day). Yesterday it started refusing to charge at full 11kW speed (again).

For anybody saying that this is normal it is not. For more than a month I had loaner Macan that have not done any of this once. If I remember correctly somebody here already stated same with their loaner Macan. My conclusion here is same as before some cars have this problem and those cars should be either fixed or replaced. If you have this issue just collect evidence and demand fix or your money back.

 

[Reno]

strange you don't want to show pictures of your Porsche Macan, a car you only have negative things to say about, I have to say with your last post, I find what you write unbelievable

 

[EVowner]

strange you don't want to show pictures of your Porsche Macan, a car you only have negative things to say about, I have to say with your last post, I find what you write unbelievable

Jesus you Porsche fanboys... Could you please explain to me what I am gaining by writing this up other than letting other owners, which if you have not noticed are reporting same things, that there is really something wrong with their cars and they should not let service centers to push them around like idiots?

I am dealing with this for last 6 months (mine issues showed up 2 months after buying this stupid thing and no discharge is just one of many other issues that I have). But hey lets see some made up pictures:

Here we have 12% drop:

This is from today:

Would you like me to continue, because trust me I can. I have also many nice videos of PCM crapping out, planner stating that I will arrive with higher SoC than car has at the start, comfort acess not working, frunk not opening, blind spot monitor seeing ghosts or car not charging at full 11kW...

 

[M324]

I do believe you and I was the one mentioning that I hod none of these issues with my loaner Macans / Taycans .

 

[Dekord]

I will also write about the behavior of my Macan 4 purchased in October 2024. For the first 6 months, the car did not lose energy when it was parked and there were no rapid drops in charge while driving. In May 2025, the service performed an update and since then the problems have started. The car loses about 1% per day, but not always. Since I have a constant temperature in the garage, whenever it loses energy, the battery temperature is 3 to 4 degrees Celsius higher. Another interesting phenomenon occurs. When the battery charge drops below 30%, the battery no longer loses energy and the battery temperature also drops to the ambient temperature. In November 2025, I performed a new update and also calibrated the battery, but things did not improve. There is also a problem with the rapid drop in battery charge while driving, which also started to occur after the first update in May 2025. This is fixed for a while if the battery discharges below 10% and probably calibrates itself. I had to try really hard at the service center to get them to believe me about what was happening with the battery, but they couldn't solve the problem. My wife also has a BMW iX1 and it doesn't have any similar problems.

 

[Reno]

“EVowner”

First of all, thank you for the pictures and apologize in advance.

I just have to say that it is also disappointing when you have bought your dream car and it does not live up to expectations. That said, you are very angry and negative in your posts and that does not help your case and when you also call someone names, you lose credibility.
The photos you have posted, I can't see with good will that there are major problems, you yourself have said that the car loses 2-3% a day and sometimes more, I don't see that in those photos. What I notice is that the battery temperature and the temperature in the room (garage) in 2 of your photos are different, namely that it is higher on the battery than in the garage. Have you just driven inside or warmed up the car, are you using the app too much or what explanation do you have for that? The door to the garage is also visible in some photos, is it open or closed and it is cold outside.
It's a bit strange that some people care so much about whether the power drops a little, they must have the same concerns with their mobile or laptop.
Here in the country there is our Porsche dealer, just the service reminder the 2 times I have used them, once for an update and my rear window broke, no problem and I myself know 2 others with a Macan EV, they experience the same, namely a fantastic car and driving machine You just seem a bit too thin skinned if it was me who had lost my love for the car, I would sell it and not look back, you are spending too much energy on it.
Good luck on your journey

 

[EVowner]

“EVowner”

First of all, thank you for the pictures and apologize in advance.

I just have to say that it is also disappointing when you have bought your dream car and it does not live up to expectations. That said, you are very angry and negative in your posts and that does not help your case and when you also call someone names, you lose credibility.
The photos you have posted, I can't see with good will that there are major problems, you yourself have said that the car loses 2-3% a day and sometimes more, I don't see that in those photos. What I notice is that the battery temperature and the temperature in the room (garage) in 2 of your photos are different, namely that it is higher on the battery than in the garage. Have you just driven inside or warmed up the car, are you using the app too much or what explanation do you have for that? The door to the garage is also visible in some photos, is it open or closed and it is cold outside.
It's a bit strange that some people care so much about whether the power drops a little, they must have the same concerns with their mobile or laptop.
Here in the country there is our Porsche dealer, just the service reminder the 2 times I have used them, once for an update and my rear window broke, no problem and I myself know 2 others with a Macan EV, they experience the same, namely a fantastic car and driving machine You just seem a bit too thin skinned if it was me who had lost my love for the car, I would sell it and not look back, you are spending too much energy on it.
Good luck on your journey

I dont believe I called anybody names, before you acused me of lying. What I find weird is that somebody who claims that he is happy with his car is spending his free time commenting in thread where people are discussing problems with their cars and acusing them that they are making it up or they are weird that they feel need to complain that their cars are losing charge/range.

You have no idea what we are hearing from service centers nor how our cars bahave yet you feel like you need to comment. When I posted my comment about service center confirming issues with discharge and even diagnostic showing up issue with HV system you could not believe it. When I post pictures that you needed to see for some reason you sre trying to poke holes in them for some reason. I dont know what is your problem, but I would sugest to sit in your 0 issue car and drive into sunset which is btw something that any of us would love to do instead of dealing with issues that our cars are having.

 

[platypus]

Meanwhile, my car has gone back to steadily losing 1% every day. I keep it plugged, so usually after a day or two it will restart the charging process from 78 to 80%.

I feel lucky compared to other people in this thread (namely @EVowner), because it hasn’t worsened, and I can wait/hope that an update will eventually address this.

From the other stories above, it does seem that this issue was introduced by a software update. That’s certainly the case for me, it all started after a June 2025 visit to the dealership.

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