Murphy. Thanks for your input. I know it is normal for the battery fan in the trunk to turn on at every charge, with this trunk fan being quiet. I am talking about very loud air conditioner fan turning on in the front hood, next to the engine. The air conditioner fan is so loud, that initially I mistook it for the ICE (internal combustion engine) turning on. If it happens to you, and you are next to your car, you will not miss it, because the air conditioner fan makes a such a loud fan noise from the front hood of the car. This happens irregularly, may be once a month. Just want to know if any other ford fusion energi owners have the same experience. My dealer did a check of the electric and battery system, and found no problems.