Post your MG ZS EV battery SOH data please

[JodyS21]

It was my missus's choice really to change the car. We're both retired & don't use the car every day. She misses a reversing camera & most of all the heated seat which are not on this Gen 1 excite model.

I forgot that there is no reverse camera and bits like heated seats on the Excite model.
Our Exclusive model reverse camera gets obscured by dirt quite a lot and then isn't much use, maybe need to clean the car more often lol.

 

[MoDolph]

It's been a while since I posted an update. I've kept an eye out on the various threads and managed to add some more data points to the charts. I've also started to include the newer SR and LR versions.

 

[Johnberg51]

Hello, long time ago I wrote something.
My SoH after almost 4 years of use and 31830 Km is 90,70%
I always charged at 80% and since the new BMS software (HV 449 V) I changed this to 85% because this results in the same voltage of 436V as before with the old software.
And of course every month a balance to 100% SoC.
Never use fast chargers.
I know somebody who does exactly the same as I and his SoH is still 98% after 4 years with even 50.000 Km. How is that possible?
I'm starting to think more and more that you must be lucky with the battery.
I must say, I make a lot of trips on small roads with many changes in speed and acceleration, maybe that is causing more degradation.
What do you think of the following reasoning?
MG ZS EV has a relatively small battery with a lot of power (105 kW)
I think this also is causing quick battery degradation because the current is divided over less individual cells.
I think the profit of a larger battery is not only a longer range but also less heavy work for the individual cells.
Maybe this explains why some Tesla’s with a big battery still are having a good SoH after many years.
My battery is going down with about 2,5% per year and it is very linear and I cannot notice any slowing down after 4 years.
A good method to check the SoH is: charge to 100% SoC, put it in normal mode with heating complete off.
Then you see the range on the GOM, in my case about 238 Km.
In new state this was 263 Km.
238 : 263 = 0,905 > SoH 90,5%

 

[Barrie]

The GOM is not a good way of calculating your battery SOH as it's based on your driving habits. You need an ODB reader to get your actual SOH.

 

[Johnberg51]

The GOM is not a good way of calculating your battery SOH as it's based on your driving habits. You need an ODB reader to get your actual SOH.

I have a OBD module, so I can check it on two ways.
But in my case it matches quite correct.

 

[gonzoB]

This is my SOH, measured with OBD.
It's going down at about 1.7% per 10,000km.

Don't know why it flattened out during the 20k period. I mostly charge from home, usually to 100%, but a few times a year I do long trips and use fast chargers.

Gonzo

 

[Johnberg51]

This is my SOH, measured with OBD.
It's going down at about 1.7% per 10,000km.

Don't know why it flattened out during the 20k period. I mostly charge from home, usually to 100%, but a few times a year I do long trips and use fast chargers.

Gonzo

How old is the car?
Now 92%?

 

[chris69]

My Gen 1 was 92.13% in November at 21,000 miles and is now 89.1% at 29,000 miles. The car is 53 months old and is mostly slow charged at home with the occasional rapid.

Degradation of 3% over 7 months and 8,000 miles equates to 5.1% per year or 4.5% per 12,000 miles.

Overall degradation since new is 2.47% per year or 4.92% per 12,000 miles so in my case mileage seems to predict degradation better than age. Looks like my car only has an expected life of little over 75,000 miles before it hits 70% state of health.

 

[Johnberg51]

Overall degradation since new is 2.47% per year

That is matching quite well with my 2,5% per year.
I only can hope that it is slowing down in the next coming years.
I've heard so much about this, but untill now it is 100% linear.

 

[gonzoB]

My car is a Gen1 bought in Apr '21. Current SoH is 92%. That graph will update itself as I get more data.
See my review of the car - link in my signature

Gonzo

 

[peterseddon]

just checked my Gen 2 LR at 23,000 mls and got 98.32.

 

[Tread Softly Terran]

Just checked my gen 2. Oct 2022 LR 18K mls. Says 99.11% using both eZS & car scanner (say the same).
Mainly charging 7kW charger & driving in eco (less acceleration stress on the battery??)

 

[Lovemyev]

Just checked my gen 2. Oct 2022 LR 18K mls. Says 99.11% using both eZS & car scanner (say the same).
Mainly charging 7kw charger & driving in eco (less acceleration stress on the battery??)

We have same model / year / milage and same charging habits.
Our battery SOH is reported as 99% at the 2 year service earlier this year.

 

[Daver]

Recently had the first service on my ZS EV Trophy LR and they failed to report my SOH, in fact I got very little feedback following the service! I note than some owners report their SOH following their own test, how might I access this information without major investment in very specialist equipment?

 

[Tread Softly Terran]

There are quite a few posts on here about 'OBD/II' devices that plug straight into the car (under the steering wheel to the right in UK/Japan etc, below the bonnet release. Plugging in vertically upwards).

They cost very little.

You can then download an app (eg eZS or car scanner from either apple store or play store depending upon phone).
It's all quite straight forward.
My OBDII is a 'nexas nexlink' but there are many other OBDII that people reported also work.
Some have suggested not leaving it plugged in, as some models might drain the 12V battery or make the alarm go off when the car goes into sleep mode.
I don't leave mine plugged in.

Hope you have some fun with it. It's far easier than it sounds.

 

[Tread Softly Terran]

Alternatively you could call the service provider and ask them for more info from the last service..?

 

[mattdav]

Only just found this thread as I'm playing with a new ODB2 dongle.

SOH 90.6%
19k miles
48 months old
Very few (<5) rapid charges done. Mostly AC with a 100% charge and balance once every4-6 weeks.

 

[Flatlands]

I think I must have been very lucky with my car!

Gen 1 ZS, registered September 2020.
C.33k miles
98%SoH just reported at 4th service
I've had the car since Feb, and charge pretty exclusively by granny charger, always to 100%.
2 CCS rapid charges in the last 8 months (both just 50-60 mile boosts from >20%)
2 type 2 charges, 1 test to check it worked, 1 to 100%

 

[julianNino]

View attachment 4512

I'm going to try to pull together some data regarding battery State Of Health, we now have cars about that have done a reasonable mileage.

These are the bits that I think would be good to know:
SOH %
Mileage done
Car age (since registered)
Rought percentage of DC (Rapid) charges vs AC charges.
How many times do you think you've charged to 100%
GOM shown in Normal(3) after a 100% charge, with both trips reset (car started without brake pedal pressed/under no load) (this gives a good indication of SOH if you haven't got access to OBD2 data)

Mine, to start things off:
SOH 97.27%
10.5k miles
7 months old
5% Rapid charging (5 Rapids done, about 100 AC charges)
About 84 charges to 100%
GOM 159miles

Want to help , I have done 65k miles on my 2022 sz long range but I havent check the SOH , how can I do it ?

Only just found this thread as I'm playing with a new ODB2 dongle.

SOH 90.6%
19k miles
48 months old
Very few (<5) rapid charges done. Mostly AC with a 100% charge and balance once every4-6 weeks.

Hello , what ODB2 are you using ? Are you on the UK?

 

[Tread Softly Terran]

Hello , what ODB2 are you using ? Are you on the UK?

Please see my posts further up the page... I mention the OBDII devices etc.