For the do-it-yourselfer, Dometic offers the CoolMatic and Adler/Barbour ColdMachine series of condensing units and evaporators designed for easy installation.
The compact PolarMate Series is available in air/water-cooled or water-cooled only configurations. The PassageMaker Series of condensing units can cool one or multiple boxes. The Mariner Series of holdover refrigeration systems run on DC voltage. The Caribbean Series is designed for boats which utilize power from the main engine.
The KRA Series of cabinet condensing units is designed for use with cockpit freezers/refrigerators, catch-box chillers, or built-in galley freezers/refrigerators.