The XOPeng P5 model shows a range of 390 km after full charge, which may be due to the error caused by a long time without endurance calibration. It is recommended to drive continuously for a period of time after being fully charged, and charge at multiple charging stations to allow the vehicle system to automatically calibrate to obtain a more accurate range display.
In addition, you can also try to reset or update the battery management system of the vehicle, or contact the manufacturer for relevant technical support to solve the problem of inaccurate battery display.