Charging concern

[Crafty42]

My 23 MME is just 2 weeks old. I've installed an Emporia home charging station, 220V plugged in (not hardwired). As recommended, I'm charging to 90%. When I get in the car and start it up, it shows 90% but can drop anywhere as low as 85% within the first 2 miles of driving. Early on, I'd go 13 miles before using 4-5%. Something I'm missing? Something I should get checked out? Weather hasn't really been any different.

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[Vulnox]

5% in 2 miles doesn't seem right... I know you say weather hasn't really been any different, but what IS the weather? Only thing I can guess at is you don't have departure times set and maybe it's getting down to the 50s/60s overnight. So when you leave, the car is trying to bring the battery up to ideal operating temp which consumes a lot of power. When you have departure times set, the car preconditions before departure using the EVSE.

For example we only charge to 80%, but my wife gets to work, an 11 mile drive, and gets there with 76%. That is in Michigan where overnight temps have been high 50s to mid 60s the last couple weeks.

If we didn't have departure times, I believe she would get there with about 73% or so, depending on overnight temps.

When you go on one of these drives, pull up the power guide on the main screen and see where it says power went for the drive. If it says something like 80% went to battery conditioning, then that's the cause.

 

[kodiakng]

nothing to be concerned about at this early of a stage. you don't mention how many miles and charges you've done but should expect your MME is still calibrating battery and charging values.

i'm 4200 miles and 2.5 months into mine and on the same short drive (5 mi) soon after charging i can sometimes get a quick drop in percentage and other times it holds much longer. however, over longer drives (20 mi or more) the consumption is the same.

 

[Crafty42]

Thanks guys. The low last night here was in the 60s. I unplugged the car last night after it had reached 90% because I have a husqvarna automower that helps me with the 5 acres of grass I have to cut. It runs at while I sleep and don't want the cord to get nicks in it. I'll figure something out though so I can leave it plugged in at nights while I sleep.

I do have a departure time set, but without it being plugged in, doesn't do much good, plus I took a few hours off this morning, being a Monday. New to the EV side, but excited to learn.

 

[ArthurDOB]

My 23 MME is just 2 weeks old. I've installed an Emporia home charging station, 220V plugged in (not hardwired). As recommended, I'm charging to 90%. When I get in the car and start it up, it shows 90% but can drop anywhere as low as 85% within the first 2 miles of driving. Early on, I'd go 13 miles before using 4-5%. Something I'm missing? Something I should get checked out? Weather hasn't really been any different.

I'm a relatively new owner, too (approx. 3 months) and I've seen more or less the same thing. For example, I charged to 90% overnight last night. As soon as I started the car this morning it was instantly at 89%. Then when I was out of the driveway and down the street, it was at 88% and I had not even driven 1/4 mile! I have no idea why it does this.

 

[Mach-Lee]

My 23 MME is just 2 weeks old. I've installed an Emporia home charging station, 220V plugged in (not hardwired). As recommended, I'm charging to 90%. When I get in the car and start it up, it shows 90% but can drop anywhere as low as 85% within the first 2 miles of driving. Early on, I'd go 13 miles before using 4-5%. Something I'm missing? Something I should get checked out? Weather hasn't really been any different.

Hmm, 5% is a lot, do you possibly have a LFP pack? What is the 8th digit of your VIN?

 

[Crafty42]

Hmm, 5% is a lot, do you possibly have a LFP pack? What is the 8th digit of your VIN?

No, I have the NCM. 8th digit is "S".

I'm guessing it was battery conditioning. Today I had the car plugged in with my departure time and it wasn't nearly as dramatic a drop. Of course my first mile is uphill too, but still wasn't what I was expecting after previous days of driving.

 

[Crafty42]

When you go on one of these drives, pull up the power guide on the main screen and see where it says power went for the drive. If it says something like 80% went to battery conditioning, then that's the cause.

Battery Conditioning is listed as what, in the Trip Monitor? My assumption is "Exterior Temperature" but just want to make sure.

 

[Mach-Lee]

No, I have the NCM. 8th digit is "S".

I'm guessing it was battery conditioning. Today I had the car plugged in with my departure time and it wasn't nearly as dramatic a drop. Of course my first mile is uphill too, but still wasn't what I was expecting after previous days of driving.

OK, just keep charging the car the same way every day for a couple weeks, the pack might still be balancing out so the drop will get less after it’s balanced.

 

[azerik]

You mention departure time. That costs battery power if you have a scheduled charge time window. That could pull it down as well. The charging of the MME seems to cut off just as it touches your "charge to XX%" so over night cooling will drop a percent or 2, departure time might drop it more if the charger isn't supplying power at your departure time.

 

[azerik]

Battery Conditioning is listed as what, in the Trip Monitor? My assumption is "Exterior Temperature" but just want to make sure.

yes

 

[Crafty42]

You mention departure time. That costs battery power if you have a scheduled charge time window. That could pull it down as well. The charging of the MME seems to cut off just as it touches your "charge to XX%" so over night cooling will drop a percent or 2, departure time might drop it more if the charger isn't supplying power at your departure time.

I'm aware. However, I was under the impression that departure time does nothing unless the car is plugged in and charging. If the percentage drops overnight, shouldn't it start charging again while plugged in?

I'm still figuring out things, but this morning the car was nice a warm when I got in it and the seat warmers were on, which I wasn't expecting nor wanted. It was showing 89% when I started it up. I haven't set up any charge windows yet. I don't pay anything different if I charge during the day or night.

 

[RickMachE]

I'm aware. However, I was under the impression that departure time does nothing unless the car is plugged in and charging. If the percentage drops overnight, shouldn't it start charging again while plugged in?

I'm still figuring out things, but this morning the car was nice a warm when I got in it and the seat warmers were on, which I wasn't expecting nor wanted. It was showing 89% when I started it up. I haven't set up any charge windows yet. I don't pay anything different if I charge during the day or night.

Your understanding is incorrect.

If you set a departure time, and the car is not plugged in, it will use battery power to warm / cool the cabin. If it warmed the cabin, that uses more energy than cooling. Hence the 89%. In the dead of winter, it might drop further.

 

[azerik]

If it's not plugged in a departure time has to get that energy from somewhere.

 

[Crafty42]

Your understanding is incorrect.

If you set a departure time, and the car is not plugged in, it will use battery power to warm / cool the cabin. If it warmed the cabin, that uses more energy than cooling. Hence the 89%. In the dead of winter, it might drop further.

If it's not plugged in a departure time has to get that energy from somewhere.

Not according to what I read in my manual. Unless I'm not reading it right.

"Setting departure times allows you to control charging schedules and warm or cool your cabin and the high voltage battery WHEN your vehicle is plugged in,..."

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