Refrigerators also need ventilation and fresh air to remove all unwanted food smells coming the minute you open it. This is a solar powered ventilator that can easily be fixed onto any compartment in the fridge. The system includes a solar panel, DC fan and the vent cover. It easily fits all domestic and most norcoid vent bases. The solar panel drives the DC fan to increase the efficiency of the fridge by up to 40%. The process cools the condenser and absorber coils tapping greater efficiency. Solar-powered RV Fridge Vent System is available here for $90