The charging pile 2 yuan has not been fully charged for 8 hours.

The reason for this situation is that the charging pile and charger do not match, and the charging pile fails.

1. The charger does not match the charging pile: the charging pile belongs to the intelligent charging pile, which will be automatically matched according to the power of the user electric car charger. If the charger has high power, the charging time will be short and the battery will not be fully charged.

2. Charging pile failure: The charging pile itself fails to provide enough power for the electric vehicle, resulting in insufficient charging.