A water-maker converts sea water to fresh water by extracting the salt. NauticExpo lists boat models by required voltage: 12V, 24V, 230V, etc. Ship water-makers may use different systems: reverse osmosis, distillation, etc.
A water-maker is used to produce fresh water from salt water.
Water-makers use a variety of desalination systems: reverse osmosis, distillation, refrigeration, evaporation, etc. Each functions in a different way.
Choice will depend on the device's output and energy consumption, and the space available for its installation.
