SOH

[maskull]

250 miles .

 

[Buster72]

How do you actually check the battery soh ?

 

[siteguru]

Dealer only with the MG4 (unless you can find it via the Home Automation route? See posts by @wattmatters). Other models might be able to get the info via OBD2/11.

 

[Tig170]

Cleevely EV use some form of "software that goes to the cloud" : 5:30 mins in




A bit more here: Health State of the Battery (SoH) - Battery Diagnostics

 

[wattmatters]

Dealer only with the MG4 (unless you can find it via the Home Automation route? See posts by @wattmatters). Other models might be able to get the info via OBD2/11.

The Home Assistant integration I have doesn't report SOH. I don't know if that's a limitation of the integration or of the information available via the SAIC API.

But my OBD reader does show a SOH value:

Since it is reporting a 100% SOH value, I guess I'll have to wait to see if/when it drops below that to see what it says and what precision level it reports.

 

[wjohnson12321]

100% SOH at 12 months mark on 12000 miles

 

[siteguru]

The Home Assistant integration I have doesn't report SOH. I don't know if that's a limitation of the integration or of the information available via the SAIC API.

But my OBD reader does show a SOH value:

View attachment 25301

Since it is reporting a 100% SOH value, I guess I'll have to wait to see if/when it drops below that to see what it says and what precision level it reports.

Why the 2 (differing) SoC values? (SoC and SOC)

 

[mg4mc]

Why the 2 (differing) SoC values? (SoC and SOC)

I think one is the "reported" SoC (what you see in the car) and the other is the actual SoC taking the reserved headroom/basement into account.

 

[dave99]

SOH mis-reporting will probably be (one of) the EV scandals in 10 years like diesel emissions - 95% SOH but only goes 50 miles

 

[DaevM]

Response to dave99 was ?, in my head ??

 

[fshuk1]

Lol...
first service SOH =95%
Second service SOH = 100%

new advertising from MG "Self healing technology"

 

[HazardLights]

Lol...
first service SOH =95%
Second service SOH = 100%

new advertising from MG "Self healing technology"

Given MG state an accuracy to within 3% for their SOH algorithm an answer with a lower value in year two is possible if there is only modest decline.
[ Moderator: lawyer -> lower. ]

 

[MickeySw]

Given MG state an accuracy to within 3% for their SOH algorithm an answer with a lawyer value in year two is possible if there is only modest decline

You’d be surprised how may people can’t tell the difference between SoC/SoH, dealers included..

 

[fshuk1]

I had 90% charge.

 

[gdog]

my mg 4 se sr is 6 months old now. almost 5k miles and OBD reader claims 95% SOH. I'm hoping it will plateau out shortly from what i read. but maybe it just follows some MG algorithm. interesting thread to me, to se others LFP SOH

 

[Bam Bam]

my mg 4 se sr is 6 months old now. almost 5k miles and OBD reader claims 95% SOH. I'm hoping it will plateau out shortly from what i read. but maybe it just follows some MG algorithm. interesting thread to me, to se others LFP SOH

Yeah ours was listed as 95% at first year MG service. Not sure if they checked or assumed. Also hoping that was the initial drop which will tail off.

I think these initial drops are hidden for the other chemistries because they have a much bigger buffer.

 

[jammamon]

The EU should step in and enforce a uniform standard of measuring SOH for all electric vehicles. Just like they did with charging ports.

 

[MickeySw]

I think these initial drops are hidden for the other chemistries because they have a much bigger buffer.

Spot on, you can make a 65kWh NMC battery and label it 61kWh (as an example) but the lower energy density of LFP won’t allow to go much beyond what’s written on the label, therefore initial, rapid degradation is more pronounced but doesn’t really matter at the end of the day..

 

[Lovemyev]

Manufactures know and understand that battery degradation will be higher to start with, therefore they hide some of the capacity in the head of the pack.
This is aimed to alleviate new owners from panicking when they see the percentage fall, very early in the life of the car.

 

[kenneth104]

23000KM with 95.2% SOH

LFP battery