What's the Record for maintaining Battery SOH at 100%

[ayres]

Yeah I reckon it will stay above 70% but way it’s going I’m expecting low 80s

 

[Alb]

I've avoided DC charging but made no special efforts beyond that.

 

[MickeySw]

I've avoided DC charging but made no special efforts beyond that.

Every Lithium battery degrades with usage, that’s why car manufacturers fit packs with (for example) 105% capacity but cap the usage to 100%. If you see a SoH of 99% it actually lost 6%.

It’s quite telling that only a few PFL SR models show ‘no degradation’ for years, therefore supporting the theory that they are indeed equipped with 120% batteries?

Imho both 100% and 88% SoH are outliers due to the particulars of the car and not related to ‘usage’.

 

[ayres]

Every Lithium battery degrades with usage, that’s why car manufacturers fit packs with (for example) 105% capacity but cap the usage to 100%. If you see a SoH of 99% it actually lost 6%.

It’s quite telling that only a few PFL SR models show ‘no degradation’ for years, therefore supporting the theory that they are indeed equipped with 120% batteries?

Imho both 100% and 88% SoH are outliers due to the particulars of the car and not related to ‘usage’.

Agreed. Think battery health is just luck of the draw.

 

[salty]

Imho both 100% and 88% SoH are outliers due to the particulars of the car and not related to ‘usage’.

Agreed. Think battery health is just luck of the draw.

Agreed.

 

[m4rmite]

Well this is a strange one
Service and mot done today, upon collecting the car i asked the service person what the hv Soh was.
Quick as a flash she reads the service sheet and it's showing 94%, picture attached.
A little disheartened as car scanner shows 100%, but at least I know what it actually is.

Anyway i drove 10 miles home and looked at the service sheet.
94% soh at 87% soc.

Wtf. I've only got 60%soc so either, I used 27% of the battery in 10 miles at 26c or the technician misread 67% for 87%.
I know for certain it was never 87% as I only got back from holiday yesterday, when I did fire up the car I had the 80% soc that I left it with 15 days earlier.

Time will tell at the next service.
Fully charged it still shows 214 miles off charged.

Well, after having the rear washer connector in the door pillar leak, and require the car to be recovered and repaired, i collected it yesterday.
They had done a car inspection on it and low and behold they had recorded the brake pad thicknesses.
At the mot/service in June 2025 they had stated front pads at 8mm and rear at 6mm, at this weeks inspection they have them recorded at front pads 10mm and rear at 8mm
Different dealerships i might add.

My hunch as previous is that they mixed up the numbers on the others cars they were testing with each other.