SoH battery PHEV calculations

[Henk{GP}]

Hi there,

A noticed an slight increase on SoH of the PHEV Battery (10.8 kWh model / 6 years old). Current report 83,1% and last report 82,7% months back. I am little surprised and I guess I should be happy it reached some sort of stable level.

Can you share anything on how Orbit retrieves or calculates this value?

I also found VIDA has been upgraded to compute and generate SoH certificates from MY21 onwards, so Volvo modified their SoH calculations probably too. Can you state something about this too? Orbit probably is more close to the legacy calculation of VIDA?

Thank you.

[leandro.vitali]

That's an interesting question, I'd also like to know how Orbit does this calculation. 

[x119]

OrBit will be providing the vehicle calculated value returned when the vehicle is queried via PID. It’s possible that Volvo has an updated the calculation algorithm for display within VIDA, but that would require investigation.

[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