Nezhv can not be turned off when charging, but it is recommended to turn off when charging to avoid safety hazards. If you must charge without turning off, it is necessary to confirm that the vehicle battery has been fully charged, otherwise it will affect the charging efficiency, and it is necessary to monitor the charging situation at all times to avoid abnormal conditions in the vehicle during the charging process. In addition, charging without turning off may also affect the life of the vehicle, especially the battery life, so it is recommended to turn off the engine during the charging process or choose other safe charging methods.