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Charging cable temperature monitoring

For the car's battery to be charged safely every time1, the control unit for the charging cable and the plug have built-in monitoring devices for the temperature.

Temperature monitoring takes place in the control unit and the plug.

Monitoring in the control unit

Charging is switched off if the temperature of the control unit is too high. This is to protect the electronics. This may take place at a high outside temperature, for example, and/or when strong sunlight shines directly on the control unit.

Monitoring at the plug

If the temperature at the power source to which the charging cable is connected is too high, the charging current is reduced. If the temperature exceeds a critical level, charging is stopped completely.


If the temperature monitoring has automatically lowered the charging current repeatedly and charging has been interrupted then the cause of the overheating must be investigated and rectified.


Avoid exposing the control unit and its plug to direct sunlight. In such cases, the overheating protection in the plug is at risk of reducing or interrupting the charging of the high voltage battery.


If charging is unintentionally stopped, both the charging cable and the car's charging system should be checked by a trained and qualified Polestar service technician. The wall socket should also be checked by a licensed electrician.
  1. 1 Refers to charging with a Mode 2 charging cable.