Sudden Range Drop at 80% Charge in Macan 4S

[Rocketair]

I brought my car in on Friday, no info back yet...

FYI that I heard back from the dealer, and they said they had to order a new "control module" and gave a mid September date as the earliest it would be delivered... pretty frustrating, on the time it will take (and the fact this is one month in...)

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[chrisk]

FYI that I heard back from the dealer, and they said they had to order a new "control module" and gave a mid September date as the earliest it would be delivered... pretty frustrating, on the time it will take (and the fact this is one month in...)

Do they have evidence the module was defective or are they just replacing random parts?
Anyway, it sounds like you will be on lemon law territory if they don't fix it properly.

 

[Rocketair]

Do they have evidence the module was defective or are they just replacing random parts?
Anyway, it sounds like you will be on lemon law territory if they don't fix it properly.

My question exactly - and they said "Porsche wouldn't approve replacing the part if it wasn't confirmed as needed by the diagnostics" and after my follow up of is this a known issue or is this step one in the troubleshooting it was "there can always be more work after this" - pretty much as expected...

 

[jkickz]

im also facing something similar where the math would result in about 235 miles at 100% despite driving fairly conservatively over the past week (4S, <2000 miles). Keeping my eyes out for updates on this, and hope the module replacement helps, though I reserve my doubts unless they provide more information on how that would cause a range estimation to drop so much.

 

[ChrisFromUK]

In July my car was on the driveway for 10 days and went from 60 to 51% SoC
Then was parked up for 14 days in August and went from 68 to 55% SoC
Any time I leave it for a day or two it is always 1 or 2% lower

So it does look like it consumes about 1% (or very slightly under) a day while parked up.

Also the Satnav is a complete basket case and can't estimate arrival SoC with anything close to accuracy. Last weekend it said I'd arrive at a charger at 5% despite being at 17% and only being a mile or so from the charger - completely nuts.

How many others are seeing this type of behavior?

 

[dimaa_6abc]

In July my car was on the driveway for 10 days and went from 60 to 51% SoC
Then was parked up for 14 days in August and went from 68 to 55% SoC
Any time I leave it for a day or two it is always 1 or 2% lower

So it does look like it consumes about 1% (or very slightly under) a day while parked up.

Also the Satnav is a complete basket case and can't estimate arrival SoC with anything close to accuracy. Last weekend it said I'd arrive at a charger at 5% despite being at 17% and only being a mile or so from the charger - completely nuts.

How many others are seeing this type of behavior?

Try charging to 90% and leave it overnight at 90%.

 

[dimaa_6abc]

OK, I have been posting in this thread, and unfortunately now is the time to post again. We had to leave Macan EV 4S sitting for 19 days, and it lost 16% - from 61 to 45. Before, I had a problem with the car unable to reach programmed SoC (like you set it to 80%, and in the morning you get 76%), I followed the advice to discharge to 20%, wait 12 hours, charge to 90% and again wait 12 hours. That fixed inability to charge to 80%, and other glitches (like the car reporting 31%->70% DC charging progress while station says it sent only 30kWh) as well. However, massive discharge did not go anywhere. It was unlocked in our garage, with the keys on another floor with concrete floor in between. But SoC drop was also observed when it was locked in the public underground garage, so I don't think the problem is related to the car being (un)locked.

Before recalibration I thought that the SoC drop is virtual, car just cannot understand what the SoC is. But yesterday I plugged it in, and this morning I found that it really consumed 46kWh (we drove it yesterday so it lost another 10%, SoC was 35% when plugging in, and 80% is the target). Which means the car actually lost that 16%, and I cannot imagine how it is possible. This is 16 kWh, insane amount of energy, just think of it. Even in theory how would it lose 16kWh other than converting it into heat?

Another strange thing is that EVSE does not get a "stop charging" signal. Current chart shows normal current of 37.8A, and once it consumed those 46kWh, drop to 2.3A. EVSE is programmed to stop charging at 7:00AM, and until then it shows sending 2.3A to the car. EVSE is good, I checked with another EV and it definitely finishes charging session once car reaches programmed SoC. I believe this started some time after getting the Macan, first few months it worked just fine, losing not a % of SoC and ending charging session correctly. I will try public AC charger which shows amperage value, have a few nearby.

Here is the amperage chart. Look at the blue line. First it is at 12 * 3 (I have three phase system and limited current to 12A, it does not matter, might have been 15 or 16), then drops to 2.3A and stays there indefinitely. It stops at 7AM only because EVSE is programmed to do so.

Anyone had this issue (SoC loss, charging glitch is a secondary issue)? Dealer said they have a software update, but I don't believe this is software glitch.

 

[ChrisFromUK]

Anyone had this issue (SoC loss, ...

Yes, I have this exact problem of the car losing a little under 1% per day of not being used. On a recent holiday it was left for 14 days and lost 13% (68% -> 55%) and just this last week I last used the car 5 days ago and today it had lost 6%.

This loss of around 1% a day has been pretty consistent since I got the car in late April.

Very approximately, this means the car is losing 1 KW /day which is an (approx) constant 40W drain. That is quite a lot of power to be in constant use when the car should be in a deep sleep.

I'm at a bit of a loss to know what to do as the dealer doesn't seem interested.

 

[dimaa_6abc]

I'm at a bit of a loss to know what to do as the dealer doesn't seem interested.

I have a dealer appointment in two weeks, on the phone dealer also did not react as this is something out of ordinary. This is definitely not OK, BMW iX lost 0% during that period. Looks like the problem is rare, I saw people reporting 0% loss. OK, I will keep pushing, maybe mention a possible lawsuit to have them at least contact the manufacturer about that, though I'm a nice person and don't go into conflict mode easily, looks like now is the time - Porsche is a premium brand which comes at premium price.

 

[dimaa_6abc]

Yes, I have this exact problem of the car losing a little under 1% per day of not being used. On a recent holiday it was left for 14 days and lost 13% (68% -> 55%) and just this last week I last used the car 5 days ago and today it had lost 6%.

This loss of around 1% a day has been pretty consistent since I got the car in late April.

Very approximately, this means the car is losing 1 KW /day which is an (approx) constant 40W drain. That is quite a lot of power to be in constant use when the car should be in a deep sleep.

I'm at a bit of a loss to know what to do as the dealer doesn't seem interested.

I have shared my issue with local EV forum (not specific to Macan), and someone there suggested that EVSE issue (last part of my post 2 posts above in this thread) hints that car does not let EVSE go into sleep, draining some energy for its needs. I have a clamp meter, and made an experiment - started charging the car (BTW it lost 1% since yesterday according to display), it consumed 1.5kWh, stopped charging, but one phase still consumed 1A, while two others 0.3-0.4A. Once unplugged, all phases went into 0.1A which is probably meter's precision. I know protocol would not allow charging current less than 6A, so I'm lost here. Probably this is specific to this particular EVSE, but with other cars it stops charging correctly.

@ChrisFromUK As you said, it very much looks like the car does not go into the deep sleep, and does not want anything around it (including the EVSE) to do that. Do you have an EVSE at home? Can you look what happens once you are done charging the Macan? Will the EVSE recognize that charging is finished, or will it hang in charging mode?

Another idea - do you have departure time configured in Macan? When I was fighting with under-charging, I tried this feature and it was configured to be repeated each day, however the schedule was off (toggle right top it was off). No climate pre-conditioning was active, but Macan's software might by buggy. I have disabled repeating departure each day, as there is no way of deleting it (I hope it will be deleted automatically once departure date is in the past).

 

[ChrisFromUK]

@ChrisFromUK As you said, it very much looks like the car does not go into the deep sleep, and does not want anything around it (including the EVSE) to do that. Do you have an EVSE at home? Can you look what happens once you are done charging the Macan? Will the EVSE recognize that charging is finished, or will it hang in charging mode?

Another idea - do you have departure time configured in Macan? ....

My problem is not related to charging, the 1% a day SoC loss occurs just when the car is parked up and not being used - not plugged into a charger.

I can't comments on anything to do with charging issues as mine works OK but my EVSE is set for a scheduled 6 hours of charging a day and my charging sessions are generally time limited with the car rarely reaching the target charge (70%) in the time available. My EVSE also provide almost no stats so I'd never see a continueing trickle charge to the car if there was one.

 

[dimaa_6abc]

OK, I see, thanks! Found a way to delete scheduled departure time - just swipe it right to left from the screen. Still car shows that it is charging (green lights everywhere) while display says charging session is complete. I'm paying so much attention to the charging because I believe those two issues (car not terminating charging session and car losing SoC) are related, and it is easier to make the dealer look into the charging as it easily reproducible.

Let's change the angle of the research - are there any Macan EV user who left the car idle for few days (preferably a week or longer) and found 0% SoC loss?

 

[sjohnso5555]

Left mine for 7 days last week with 0% SOC loss.

 

[robrain]

One, possibly really dumb, question that occurs to me: are people with losses using the app at all to check for losses, possibly several times a day? Do they have Apple watch complications? Do they use ABRP or similar apps that link to the car? In ye olden Tesla days these were red flags for vampire loss - the Tesla system needed to wake up some portion of itself to answer these requests and then took time to go back to sleep. Some software even prevented the system ever going fully to sleep.

EDIT: checking the Tesla forums, other things to watch for included: dodgy wifi in the car's resting location causing endless connection/disconnection; dodgy door closed sensors or a door left ajar; extreme temperatures causing battery heating or cooling operations; long-running map updates (esp over dodgy wifi connections); OTA updates (ha!, we can dream).

 

[dimaa_6abc]

One, possibly really dumb, question that occurs to me: are people with losses using the app at all to check for losses, possibly several times a day? Do they have Apple watch complications? Do they use ABRP or similar apps that link to the car? In ye olden Tesla days these were red flags for vampire loss - the Tesla system needed to wake up some portion of itself to answer these requests and then took time to go back to sleep. Some software even prevented the system ever going fully to sleep.

EDIT: checking the Tesla forums, other things to watch for included: dodgy wifi in the car's resting location causing endless connection/disconnection; dodgy door closed sensors or a door left ajar; extreme temperatures causing battery heating or cooling operations; long-running map updates (esp over dodgy wifi connections); OTA updates (ha!, we can dream).

Nothing of the above, though as the car is in our private garage, it is not locked. But SoC loss was observed when it was locked in underground public garage, being underground, it could not have extreme temperature (though it was really hot outside).

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