Charge loss while parked
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Member
Joined: Mar 2013
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From: NE Florida
2023 EQS 580
Charge loss while parked
I charged our 580 to 80% Friday night and I removed the charge cable Saturday morning. We did not drive it again until Sunday Morning. When leaving the house, I was at 78%. Why the 2% loss? The only thing I could think of, is a setting that is consuming energy while parked. Maybe dashcam? We are getting around 4.05mi/kWh. I should be able to go 250 miles between charges (charging from 20% to 80%). I’m only getting around 200 miles. Average temperature outside is about 65. Would love to hear others experiences and/or recommendations.
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From: WI
17 E43; 21 GLS580
My expirience with phantom losses is that the car has barely any, even at temperatures well below zero. I have have parked the car for 2 weeks at normal temps with zero losses.
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Cannot explain the 2% loss but it is not from the dashcam. I thought the camera was not even active when parked, just if the alarm detected an issue (based on other sensors, not the camera), it would trigger photos. In any case, the camera runs from the 12 V battery as does everything else when the car is parked and after it has entered full sleep state. The high voltage battery should not lose SOC unless pre-heating or something similar was activated. Minor internal leak makes it lose charge but this is very slow.
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From: WI
17 E43; 21 GLS580
Cannot explain the 2% loss but it is not from the dashcam. I thought the camera was not even active when parked, just if the alarm detected an issue (based on other sensors, not the camera), it would trigger photos. In any case, the camera runs from the 12 V battery as does everything else when the car is parked and after it has entered full sleep state. The high voltage battery should not lose SOC unless pre-heating or something similar was activated. Minor internal leak makes it lose charge but this is very slow.
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From: NE KY, on the Ohio River
2018 S560; 2022 EQS450+
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Thread Starter
Member
Joined: Mar 2013
Posts: 116
Likes: 38
From: NE Florida
2023 EQS 580
I charged our 580 to 80% Friday night and I removed the charge cable Saturday morning. We did not drive it again until Sunday Morning. When leaving the house, I was at 78%. Why the 2% loss? The only thing I could think of, is a setting that is consuming energy while parked. Maybe dashcam? We are getting around 4.05mi/kWh. I should be able to go 250 miles between charges (charging from 20% to 80%). I’m only getting around 200 miles. Average temperature outside is about 65. Would love to hear others experiences and/or recommendations.
Does it get better? What have others experienced?
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MBWorld Fanatic!
Joined: Aug 2009
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From: NM
2023 AMG EQS
Thanks for the reply’s, I’m going to monitor the phantom loss and schedule service if it persists. We are also trying to gauge miles between charges. We are currently below expectations. I thought we’d get at least 200 mi (we charge 20-80%) but we are only getting 180 miles. Sorry, I misspoke in the OP. Forget about 4.05mi/kWh. We are at 384wh/mi or 2.6mi/kWh. I don’t know why, but mi/kWh is frequently used as a measurement, however the EQS uses wh/mi in the car display. Wouldn’t you need to get 3.2mi/kWh or 345wh/mi to yield 340 mile range? Seems unachievable for us and we’re on flat land in 65 to 70 degree weather.
Does it get better? What have others experienced?
Does it get better? What have others experienced?
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Joined: Oct 2014
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From: WI
17 E43; 21 GLS580
Check your app. If you have scheduled preconditioning times it can be quite easy to not turn it off even if you think you did! Personally Im still uncertain if just flicking off the time or deactivating the feature is the one that kills it off if you dont need it! I thil that I have simply forgotten to hit save when I flick the time off! There is an annoying additional step in the process. The cabin preconditioning does use a not insignificant amount of battery.
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From: Dallas TX
2022 EQS 450
There is also the driving style which the computer uses to determine range. If you drive above the speed limit and accelerate quickly every time the range is affected. Many factors are used to determine range. Try resetting your trip computer, drive conservatively. use the ECO monitor and achieve 5 stars and notice the new range target.
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From: SF
E-Class
I assume the 2% is the car's connection to the network. You can constantly check your car's status and other stuff on your phone, but your car needs to be using some energy to give you that info. I can't comment on the range.
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Connectivity from/to the car to/from MB servers does consume some power but NOT from the high voltage battery when the car is parked. The 12 V battery provides power to these control units.
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No Mercedes yet
It's possible that the 2% drop that you saw was a one-time occurrence, and would not continue if you continued to leave your vehicle parked for many more days. That's what happened to me, when I left my EQS SUV parked for more than 2 months. It started off at 37%, where it stayed for 6 days. But then, the next day it suddenly dropped to 34%. This worried me at first, but the vehicle stayed charged at 34% for the next month and a half, when it dropped 1% more, to 33%. It stayed at 33% for several more days, until I returned.
I don't know what caused the sudden 1-day drop from 37% to 34%, but I was pleased that it didn't continue.
I don't know what caused the sudden 1-day drop from 37% to 34%, but I was pleased that it didn't continue.
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From: SF
E-Class
It's possible that the 2% drop that you saw was a one-time occurrence, and would not continue if you continued to leave your vehicle parked for many more days. That's what happened to me, when I left my EQS SUV parked for more than 2 months. It started off at 37%, where it stayed for 6 days. But then, the next day it suddenly dropped to 34%. This worried me at first, but the vehicle stayed charged at 34% for the next month and a half, when it dropped 1% more, to 33%. It stayed at 33% for several more days, until I returned.
I don't know what caused the sudden 1-day drop from 37% to 34%, but I was pleased that it didn't continue.
I don't know what caused the sudden 1-day drop from 37% to 34%, but I was pleased that it didn't continue.
Definitely bring it in if you are not getting close to maximum range for 80%.
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My car is garaged, but I have never lost any charge while it is parked, even in Winter. It has been parked on occasion for up to three weeks without any charge loss. I suspect you may have a battery defect, and I would recommend taking it in for evaluation.
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Joined: Mar 2013
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From: NE Florida
2023 EQS 580
Agreed. I did not notice any loss today, so maybe it was a onetime occurrence. The other weird thing I noticed is the fluctuations in power added. Maybe, I’m missing something but if the battery is 108kwh and I charge from 20 to 80%, I should be adding 65kwh. The last charge, I started at 19% and added 74kwh. Wouldn’t that be adding 68% or 12-80%. I do t know. I’m going to keep an eye on that too. Maybe there is a good reason for the extra power, battery conditioning etc.
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2010 E350 4Matic
Another possibility is that the car's SOC charge calculation is incorrect.
Last edited by MBNUT1; Feb 8, 2023 at 11:07 AM.
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From: Cincinnati
2010 E350 4Matic
Agreed. I did not notice any loss today, so maybe it was a onetime occurrence. The other weird thing I noticed is the fluctuations in power added. Maybe, I’m missing something but if the battery is 108kwh and I charge from 20 to 80%, I should be adding 65kwh. The last charge, I started at 19% and added 74kwh. Wouldn’t that be adding 68% or 12-80%. I do t know. I’m going to keep an eye on that too. Maybe there is a good reason for the extra power, battery conditioning etc.
What were the circumstances of the charging? How do you know how much you put in? Were you at a public charger or does your wall charger give you this information?
Thread Starter
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Joined: Mar 2013
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From: NE Florida
2023 EQS 580
The average from my 4 charges is probably close to 70kwh added. So maybe an average 5kwh loss. But still, that seems like a fair amount. I guess the preconditioning consumes a lot.
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What amperage are you running? Do you precondition the cabin / battery before leaving?
Last edited by MBNUT1; Feb 8, 2023 at 01:58 PM.
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GLK350
I charged our 580 to 80% Friday night and I removed the charge cable Saturday morning. We did not drive it again until Sunday Morning. When leaving the house, I was at 78%. Why the 2% loss? The only thing I could think of, is a setting that is consuming energy while parked. Maybe dashcam? We are getting around 4.05mi/kWh. I should be able to go 250 miles between charges (charging from 20% to 80%). I’m only getting around 200 miles. Average temperature outside is about 65. Would love to hear others experiences and/or recommendations.
Not sure this applies to you but I read an article recently(either Motortrend or Car & driver) that tested several EV's and it that most lose charge just sitting and not being used. They stated that with an EV the vehicle conducts routine conditioning (not sure what) which draws down the batteries.
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Joined: Dec 2006
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223.168 & 213.012 & 906.633 & 214.005
Not sure this applies to you but I read an article recently(either Motortrend or Car & driver) that tested several EV's and it that most lose charge just sitting and not being used. They stated that with an EV the vehicle conducts routine conditioning (not sure what) which draws down the batteries.
Any battery loses charge over time even if completely disconnected from the outside world. For lithium batteries this is insignificant. What sort of figures did the article talk about? 1% a day, week, month, year? Makes a difference!
I'm not sure if the high voltage battery control unit actually did some periodic checks. I would assume more like hard wired leak monitoring but in any case, nothing that would cause noticeable battery drain on an EV with a relatively huge battery.
The 12 V battery has a lot of continuous load. Nothing like the starter on an ICE car but significant compared to the total capacity. The alarm system is on when parked (of the order of 40 mA power consumption), the remote access modem is on, keyless go is active etc. All these are a significant power drain if e.g. the car was not driven for a month.
The 2% loss for the high voltage battery that is being discussed, must have some other explanation than normal periodic tasks or battery internal leak. Could be timed (unintentional) cabin pre-conditioning, the car detecting the key and triggering heat seating. Perhaps battery cooling after charging session although this should not be needed when charging at home with low current (cooling or heating).
