How / can you check battery SOH ?

Ayoull said:
ABRP does now show degredation, I have a NEXAS ODB2 dongle and my car with just shy of 2500 on the clock is showing 1.8% degredation which is a tad higher than I'd expect, but not going to worry just yet as degredation is higher in the first year than the remainder of the cars life generally.

Edit:

Screenshot from ABRP

View attachment 16181
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LFP can degrade as much as 10% and then levels off pretty flat, LFP Teslas are seeing comparable degredation to yours. Believe NMC is slower initially but keeps progressing down steeper after the first year and obviously can do only about half the cycles total.
 
Les burrows said:
Quite a lot do nowadays nothing wrong in that I wonder how long it will be before they have an EV on sale.
Les
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I wonder if they will be running a “Bog Off Offer” ( Buy One - Get One - Free - Offer ) any time soon ! 🤣.
I think we are bit away from that !.
We have a new Aldi that opened close by last summer, it has two A/C units with four dedicated EV parking bays !.
Brilliant you may think, but the manager had them turned off ages ago because of an issue over the parking rights on the car park !.
What a complete waste of money and chargers for that mater.
Oh well ……. There is always a Tesco next door, with four Pod Point units that are always in use.
I wonder why that is ??? 🤔.
 
The 7 year warranty says they guarantee at least 70% battery capacity y the end of year seven

But how can we check it for real if only the dealers can tell you then they will say it’s still more than 70% no matter what.


Really the range from a full charge should tell you the capacity left compared to when it was new
 
tsedge said:
LFP can degrade as much as 10% and then levels off pretty flat, LFP Teslas are seeing comparable degredation to yours. Believe NMC is slower initially but keeps progressing down steeper after the first year and obviously can do only about half the cycles total.
Click to expand...

If you do a rough calculation on typical data…

Lets say NMC is good for 800 charge cycles. Say 200 miles real world range for LR battery. Thats 160,000 miles.

Obviously assuming 100% to 0% discharges which isn’t happening. But ive never kept a car over 93000 miles in the days i was doing long commutes. Those example figures would do 12-15 years for me.
 
Driven a mile down the road before it updated the SoC on ABRP properly, but still 1.8% degredation


Screenshot_20230324-072034.png
 
If we do a crude extrapolation (linear interpolation) on these 2 points (LFP battery)
Distance (miles), Degredation (%)
2500, 1.6
6300, 2.6

... a 30% degredation comes in at 110420miles
 
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ABRP can also record kW usage (it does include ancillary usage such as heating / AC mind) could be used to see power throttling problem.

You can export to CSV and it has the power ratings per GPS co-ordinate.
Screenshot_20230324-080207.png
 
Thank you guys Ayoull, and Tig 170, for the posting and pictures but I have to admit I’m lost in try to understand what it all means, so Ayoull shows that a 100% Soc makes no difference as I requested, the only other thing I can see difference is you both have about the same voltage but very different power 3.0kw against 0.2 kw and also different elevation what ever that means, so please excuse me I don’t understand what all of this means but if as Tig170 has posted the car we still be running at 110,000 miles then there’s no worries it’s the wife’s 4SESR and her last car she had for around 16 years and was under 60,000 when she got the MG4.

But as I said at the start of thank you guys for the interesting inputs
Les
 

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