6% Battery Degradation after 3 years, 35k miles

[ocdxfv]

According to the Car Scanner app, my '21 Select, RWD, Std Battery shows 6% degradation after 39 months and 35k miles. This was checked after an 80% charge and an ambient temp of 68 deg. The GOM used to show 200 miles on an 80% charge but now shows 190 (which is down about 6%). Sound about right?

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[grein002]

My understanding is that the SOH estimate depends on some recent charge-to-100% sessions for maximum accuracy.

 

[ocdxfv]

I wondered about that.

 

[0CO2]

My '21 FE (so premium extended range) with similar mileage to yours shows less than 2% degradation. I don't do much DCFC (perhaps 8-10x per year), so perhaps that's a factor?

 

[generaltso]

According to the Car Scanner app, my '21 Select, RWD, Std Battery shows 6% degradation after 39 months and 35k miles. This was checked after an 80% charge and an ambient temp of 68 deg. The GOM used to show 200 miles on an 80% charge but now shows 190 (which is down about 6%). Sound about right?

That's not necessarily the case. There was an OTA update recently that changed the way that the SOH value is calculated. That resulted in batteries appearing to lose SOH, but nothing has actually changed.

 

[azerik]

Normal from what I've seen. I don't have much cold here but I do have tons of heat throughout the year and 2% is what I've seen in my EV's for the last 12 years.

Also GOM guesses based on available power at that time. Not the SOH from what I've read.

 

[Jerrytball]

Normal from what I've seen. I don't have much cold here but I do have tons of heat throughout the year and 2% is what I've seen in my EV's for the last 12 years.

Also GOM guesses based on available power at that time. Not the SOH from what I've read.

This is the dashboard you were telling me to get that number yesterday?

 

[RWD_ER]

My '21 FE (so premium extended range) with similar mileage to yours shows less than 2% degradation. I don't do much DCFC (perhaps 8-10x per year), so perhaps that's a factor?

Hey, apparently, there could be multiple factors. Where do you live? And do you keep the charge between 10% and 90% often?

 

[Teslaeata]

According to the Car Scanner app, my '21 Select, RWD, Std Battery shows 6% degradation after 39 months and 35k miles. This was checked after an 80% charge and an ambient temp of 68 deg. The GOM used to show 200 miles on an 80% charge but now shows 190 (which is down about 6%). Sound about right?

My SoH lost 6.5% at 34 months and 84,000 miles checked after 100% charge, assuming there ever was a 100% which I never saw because I didn’t start checking SoH until c 40,000 miles.

 

[azerik]

The thing with worrying about the SOH is how often you need 100% of the battery, vs how often you use 100% -2, -2, -2, -2, -2 =% 5 years after buying. 5 years from now you've taken a 10% range hit and 99% of your driving is less than 50% of your range it's nothing to lose sleep over. Does it hurt a little knowing the numbers? Yes. just like the sleep people lose over their phones only having 90% of the battery 2 years later.

 

[Jerrytball]

This is the dashboard you were telling me to get that number yesterday?

I ran this today when I got home. My battery was at 47% charged so I put it back on the charger for now. It’s only four cents?

 

[GarageWarrior2023]

How accurate is the carscanner pro SOH readout? is it the same as what Ford would see or does Car Scanner do some math based on battery capacity and the last few 100% charges. IE, if it charges to (for example) 66kwh at 100% and knows 70kwh capacity is potential 100% then it does the math to display the number.

I've wondered because I have 2 mach-e's, same year same age relatively the same mileage and within 4 months of owning them (less than 10,000km) we hit winter and at 100% in the cold the app was seeing 66kwh at 100% charge which I assume was because of voltage drop in the cold with a colder battery. Both vehicles showed similar. SOH was reading between 94% and 95% on the two machines.

I haven't yet done a new warm weather reading. but before I do, I was curious if anyone can shed some light on how I should be interpreting the data.

 

[spicy_taco]

My 1 year old 23 extended dropped to 96.5 in the winter. I charge to 85% on a daily basis , and only used DCFC a handful of times during road trips.

 

[GarageWarrior2023]

My 1 year old 23 extended dropped to 96.5 in the winter. I charge to 85% on a daily basis , and only used DCFC a handful of times during road trips.

Mine are both 23's as well. Did your SOH go back up in the summer again? I'm assuming it will when I take my readings this weekend.

 

[spicy_taco]

Mine are both 23's as well. Did your SOH go back up in the summer again? I'm assuming it will when I take my readings this weekend.

I checked recently and it's still 96.5 but I haven't charged to 100% recently. Might try it over the weekend.

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