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installed a PUR 80 below the head sink. Works well, but you need to pay attention to the electrical budget.
The solar panels on the boat keep up with all the electrical needs of boat except the watermaker. Typically would run the water maker when either the solar panels were working really well (batteries back to full capacity by 10-11 AM) and would run it for the afternoon and the let the panels catch up over the next day or two. Or would run the watermaker on the day before we knew we would be motoring and/or while motoring. Would run the watermaker while
underway as long as the boat was not heeling to the port side.
The larger the unit the better as the electricity consumed per gallon of production remains about the same. Don't focus on the published specs of gallons produced per day and think more of the gallons produced per hour to see if it fits your needs. 80 gallons per day sounds like a lot, but it
is just over 3 gallons per hours which means 12-13 hours to fill one tank.
You also need to be careful where you run the any of the units as oil will kill the the RO membrane. Running it a crowded anchorage such as Zihuatenejo at Christmas time is questionable, but then you could always purchase purified water in 5 gallons bottles and have it delivered to the boat for a reasonable fee in Zihuatenejo. Along mainland Mexico you will likely use the watermaker less
frequently but up in the Sea of Cortez you will use it frequently.
Although I was envious of friends who ran an engine driven watermaker and made lots of water in
the hour or two they ran the engine everyday (required to keep their there freezer/refer going), I like to limit the engine running to times when I need to motor from one spot to another.
On a redo I would look at the PUR 160 or one the Spectre units.
Crazy Fish, Crealock 37, Hull 207
Last edited by crazyfish; 10-15-2010 at 10:08 AM.