Hello, (IMAI: 863738076307595 )
I would like to correct my previous report, because after additional testing I found that the issue is different from what I initially described.
The main problem is that the State of Charge (SOC) data received from the FMC150 OEM on Peugeot e-208 P21 (2019–2023) becomes chaotic after charging.
What I observed:
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During vehicle charging, the SOC data may appear normal.
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However, after disconnecting the charging cable, the device sends a packet showing the battery at 1%.
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Then, during driving, new packets start arriving approximately every 30 seconds with values such as 5%, 9%, 11%, 14%, 18%, 21%, and so on.
This makes it look like the battery is charging while the vehicle is being driven, which is clearly incorrect. The SOC increases step by step very quickly until it reaches the real battery level. After that, it changes direction and only then starts showing the correct discharge behaviour.
So, the issue is not only an incorrect SOC value at the beginning or immediately after charging. The real problem is that after charging is finished, the SOC logic becomes incorrect: during driving it behaves like an artificial charging sequence instead of showing normal battery discharge.
This creates invalid battery data for the client system and makes the SOC information unreliable.
I am also attaching the photos you requested, including the VIN number.
Additionally, I am attaching a separate photo marked TEST. In that test, I was able to retrieve odometer, engine RPM, door status, and accelerator pedal data. However, I was not able to retrieve battery capacity / battery charge data.
I also tested different OEM versions.
At the moment, the vehicle is connected via CAN1 on OBD using the OEM profile that matches your provided wiring diagrams.
It seems that after charging ends, the SOC signal or its interpretation becomes incorrect until it eventually returns to the correct values.
Thank you.
Best regards,
Vladyslav
Technician Commander Slovakia
