HVB SOH 80%

[BillTinVT]

Hi, How concerned should I be that my 2023 Premium extended range with 15,800 miles is showing an Hvb SOH of 80%? Everything else about the battery seems fine to me. Could this be due to the state of charge at the time when I run the scanner? Or something else that I'm doing wrong?

Thanks,
Bill

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[Mach-Lee]

Give this a try and see if anything changes: https://www.macheforum.com/site/threads/hv-battery-calibration-procedure.23815/

LFP or NCM battery? What is your normal charging routine like?

The warranty kicks in at 70% if that is reached in less than 8 years.

 

[BillTinVT]

Since it's an extended range, it's NCM battery, right?

My charging routine has been to charge at home most of the time with a very short commute to work, 4 miles round trip. I was plugging in and charging to 100% every night for the 1st 6 months or so, until I read that it was better to charge to < 100%, since then, I charge to 80% unless I have a trip planned.

 

[Mach-Lee]

Since it's an extended range, it's NCM battery, right?

My charging routine has been to charge at home most of the time with a very short commute to work, 4 miles round trip. I was plugging in and charging to 100% every night for the 1st 6 months or so, until I read that it was better to charge to < 100%, since then, I charge to 80% unless I have a trip planned.

Extended range is NCM, yes. So if you are only charging a couple percent at a time, the SoH estimate may be way off because of the shallow charge cycles. The calibration should help with that. In theory it shouldn't update the SoH value until it sees a deep enough charge cycle, but there have been some tweaks with the thresholds.

Because you drive short trips, I recommend not charging every day unless you need to use preconditioning. So if your target is 80%, wait to charge until you have it down to 70% or less.

 

[BillTinVT]

Thanks. I'll try the calibration routine. I recently did a long road trip which I thought might result in some recalibration. I had noticed the low SOH a while before I went on the trip. I was disappointed that it has not improved since the trip. On the bright side, the trip went great and the predicted and actual range were within what I would expect.

If I did damage the battery by charging to 100% during my first few months of ownership, I will be annoyed that this risk wasn't made clear to me and every other owner from the start. There should be a warning on the charge port door, or the default target charge should be <100%. I assumed that the software would manage the state of charge for optimal battery health.

 

[Sikkun]

You probably didn’t damage it, the software also doesn’t actually let you go to 100%.

But the manual does also tell you to not go to 100% for optimal care.

 

[BillTinVT]

Thanks. I didn't find anything in the printed information that came with the car ( not that I would have seen it if it was there anyhow).

I did find this with a bit of searching in the on-line manual.

Storage State of Charge
You can increase the battery life by maintaining the state of charge below 100%. When you park your vehicle for an extended period of 30 days or more, we recommend the battery state of charge be at approximately 50%. Storing your vehicle's high voltage battery at higher states of charge is less favorable than storing at lower states of charge.

 

[E90alex]

Since you drive so little you can also consider lowering the charge limit to 50-60% instead.

 

[Maquis]

Since you drive so little you can also consider lowering the charge limit to 50-60% instead.

That won’t help the calibration and could even make it worse.

 

[Sikkun]

Thanks. I didn't find anything in the printed information that came with the car ( not that I would have seen it if it was there anyhow).

I did find this with a bit of searching in the on-line manual.

Storage State of Charge
You can increase the battery life by maintaining the state of charge below 100%. When you park your vehicle for an extended period of 30 days or more, we recommend the battery state of charge be at approximately 50%. Storing your vehicle's high voltage battery at higher states of charge is less favorable than storing at lower states of charge.

Also:

Either way there are plenty of people who charge to 100% every night, while not the best for LONG term necessarily, shouldn’t have killed 20% of your battery in a couple months either.

 

[RickMachE]

Thanks. I didn't find anything in the printed information that came with the car ( not that I would have seen it if it was there anyhow).

I did find this with a bit of searching in the on-line manual.

Storage State of Charge
You can increase the battery life by maintaining the state of charge below 100%. When you park your vehicle for an extended period of 30 days or more, we recommend the battery state of charge be at approximately 50%. Storing your vehicle's high voltage battery at higher states of charge is less favorable than storing at lower states of charge.

You might want to download the manual in PDF format to all your devices and read through it. Charging to 90%, not 100%, is pretty clearly called out.

 

[mkhuffman]

After charging to 100% check Energy to Empty (EtE) and then divide by 91 kWh. I suspect it will be much higher than 80%. If so, you can worry less.

 

[crl]

FWIW I drive less than 10 miles a day (most days less than 3) and I've almost always charged to 100% daily, since day one of ownership. According to TorquePro/Carscanner apps, my HVB SoH is 99%.

 

[GreaseMonkey]

FWIW I drive less than 10 miles a day (most days less than 3) and I've almost always charged to 100% daily, since day one of ownership. According to TorquePro/Carscanner apps, my HVB SoH is 99%.

Great. Now you know. This is a perfect time to stop doing that, then.

 

[BillTinVT]

Well, I’ve started the calibration with the first easy step. Charged to 90%. Now I need to drive 250 miles to get my SOC down below 10%.

My daily commute is now 20 miles due to multiple construction projects that I like to avoid. With that and some unnecessary road trips, I can probably get down to 10% by the weekend. Just need to pick a good time to be without the car for a day while it rests and recharges. The kWh at 99% is not encouraging

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