@JodyS21 has done a fantastic job of planning out and set up a speed sheet, of HV performance / SOH of the ZS EV Gen1 model battery packs.
This has been compiled by data provided by Gen1 owners who has supplied facts and data from their cars.
This data has been taken from cars running on both the original factory software AND cars that received the BMS soft ware update release on the 15th Jan 2020.
It makes very interesting reading
which I am sure could provide interesting reading for some people.
There is pattern that strongly indicates that the Gen 1 model does suffer from battery degradation, more than you would expect compared to other EV’s.
A LOT of data provided by owners with very different usage cases also.
Some with low usage and some covering a lot of miles, regular rapid use and some with none.
Some following what is considered to be a kind to the battery protocol by charging from 20 to 80% and others charging to 100% every single time.
In a nut shell, mileage covered appears to be the dominant factor here !.
Some owners with low usage cases, who have only covered less than 10,000 miles in two years and charge from home reporting 100% SOH to higher usage cases with similar charging behaviours but higher mileage recorded, now seeing a lower SOH of around 94%.
We know that manufactures build in an extra top buffer at the top of the HV pack because when new, they expect the battery to degrade fairly quickly, then slow right down.
This is done so the owner does not start to panic when there range starts to decrease very early in life.
However it appears that this maybe not the case on the Gen 1 models.
As the previous owner of a Gen1 model for over two years and covered 20,000 miles ( with BMS update done ) and 99.9% of my charging done from home and following what is thought to be “Good” charging protocol ( 20 - 30% SOH ) for the majority of the time.
Unless making a longer journey and then charging to 100% and also not allowing the car to sit at 100% SOC - I know that my actual range had been slowly decreasing over this time period.
Others owners have witnessed the same condition happening.
Owners of other EV’s with much larger mileage covered, do not appear to be witnessing as much degradation this early in the cars life cycle ?.
A lesson to be learnt ( and by myself ) here is this.
When choosing an EV set against your present usage case, build in some degradation loss into that equation, or you could be finding yourself charging a lot more often as time passes by.
Just connected up the OBD scanner to the ZSEV to see for myself.
