Incorrect SOC value for Porsche Taycan Cross Turismo (MY 2021) in ABRP

Hello ABRP Support Team,

I am using ABRP with my Porsche Taycan Cross Turismo (Model Year 2021) and I am noticing that the SOC (State of Charge) shown in the ABRP app does not match the SOC displayed in the vehicle.

The deviation is consistent and not just a short-term delay. The SOC shown in the car differs from the value ABRP uses, which leads to incorrect range and charging predictions.

Context / details:

• Vehicle: Porsche Taycan Cross Turismo, MY 2021

• ABRP usage: iOS / Apple CarPlay

• Data source: Porsche Connect integration (no manual SOC input)

• Issue: ABRP SOC differs from the SOC shown in the vehicle

I have verified that:

• the vehicle connection is active,

• the ABRP app is up to date,

• and the issue persists across multiple drives.

Could you please clarify:

• which SOC value ABRP uses for the Taycan (BMS SOC vs. displayed SOC), and

• whether there is a known synchronization or calibration issue specifically affecting 2021 Taycan Cross Turismo models?

If required, I am happy to provide screenshots, logs, or further vehicle details.

Thank you in advance for your support.

Best regards