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Battery has now dropped to 96.34%. I posted this with Car scanner info for anyone who could cast their eye over it. Battery degradation

Interesting that you are still on the original BMS and having the same problem. I'm on the new one (having had the duff one in Nov). My voltage is still showing the ideal 449 though on this BMS update and 93% soc when fully charged up.

This morning it has dropped to 97.06% from 97.52% yesterday. It that time it wasn't charged and did just 20 miles. Total mileage 19,800.

https://www.facebook.com/groups/MGElectricVehicleOwners/files

Cheers. Any idea how I would go about measuring the unit packs temps?

I can post the instructions but the are files on the Facebook group that need to be downloaded as well.

Looks like the torque pro readings just give the cell error figures. Not sure if this is any good for diagnosing the issue?

Is it best to do a full charge and balance before checking that? I've just set up Torque Pro via links and instructions from the Facebook group which will have the voltage reading for each of the 9 packs.

And after 3 full charges since Friday and 2 rapid charges sue to trips away, my SOH has now dropped overnight from 98.55 to 97.52.

Mileage is 18.5k so I guess the total degradation for that mileage seems probably about fair? It's more the drop in the last month that is concerning now I'm able to monitor it through the app. Very few DC charges and none in the month. Maybe even just 1 or 2 this year.

I've done a couple of full ac charges and balances. Maybe 3. I'm doing around 1.5-2k miles a month. Had the dodgy bms update but during the time I had it I barely used the car so it didn't take much to get it up to the expected 449 volts.

According to the app, my soh has dropped from 99.59 on 14th March to 99.16 on 25th March and now to 98.55 today. That seems a bit concerning?

So are we're saying that the usable battery is now 93% of the original 44.5kwh pack giving a 41.385kwh usable capacity? If so, is the app likely to be updated to revise the % to 100% for this usable capacity when fully charged instead of 93%? Great work btw.

I bought this one off Amazon which was mentioned earlier in the thread. It did give a strange reading for max cell voltage, mind.

Hi. Newbie here! Had my OBD device delivered today. After a bit of fiddling I managed to get things working and had some readings but quickly it crashed with the attached error messages. Any ideas? Thanks.