We have tested three different manufacturers. We have had good service from all three. The simplest to use are the 12 volt units that we have on a half dozen boats. They are made by Aquabase they use energy recovery and are very simple to operate. They make 15 gallons and hour so two to four hours a day keeps up with most boats. They set their own pressure it is a simple on off and back flush buttons. As long as we keep the prefilters clean they have been very reliable. We also have three large 220 volt units made by Blue Water Desalination. While slightly more complicated they make 25 gallons and hour.
We also have one Desalinator that is OEM on a new Beneteau 48 it is dual voltage and works very well. It also is slightly more complicated as you have to set the pressure and decide between 110 volt and 12 volt for operation.


Jay