SoH battery PHEV calculations

[Henk{GP}]

I checked my files, have this historic data on the SoH

~ 2023 Oktober
I have Orbit reporting 83,4% SoH Drivetrain

~ 2024 May
I have Orbit reporting 82,7% SoH Drivetrain

* dealer visit with CEM update in 2024 september

2025 June
I have Orbit displaying SoH Drivetrain 82,47% on 2025-05-06

no dealer visits in this period in between 

2025 September
I have Orbit displaying SoH Drivetrain 83,1% on 2025-09-02

2025 September 5th.
Dealer service, CEM reload/update etc.
Empty Battery : Orbit reads SoH 83,27%

2025 September 6th
Full Battery in the evening Orbit reads SoH 83,99%