DC VOLTAGE REQUIREMENTS
The operational range of the unit is a minimum of 9.6V DC to a maximum of 22V DC, the unit will automatically shut down until voltage has decreased to 18V DC. The refrigerator requires at least 9.6V DC for proper operation; however the panel lights will continue to illuminate until voltage has dropped to 4V DC or below.
AC VOLTAGE REQUIREMENTS
Proper Operating Range is 100 to 132 Volts. If voltage drops below 100 volts, cooling efficiency will decrease with voltage decrease. The refrigerator will not switch to another mode of operation until all AC power is lost.
Landing gear motors need the proper DC voltage too - as voltage goes down the current draw goes up to provide the same power to the motor - too low of a voltage and you could damage the motor - but will probably blow fuses first.