Dual Redundant Picture Frame Refrigerant System For A Refrigerated Container

A picture frame refrigerant system for a known shipping container is provided. The picture frame refrigerant system includes a refrigeration unit having a body secured to an open end of a known shipping container, a first cooling unit, a second cooling unit, and a system interface box connected to the first cooling unit and second cooling unit and adapted to power on or power off the first cooling unit and the second cooling unit in a redundant manner.