If the electric car charger is hot when charging, it may be because the battery and the charger do not match to cause the charger to heat, or because the charging time is too long, and the battery is too short of electrolyte, which causes the charger to heat, or the radiator inside the charger is damaged, resulting in hot phenomenon. If the electric car charger is hot, it should be unplugged at this time, and it is not recommended to continue charging or replace the charger in time.