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Old 08-25-2014, 03:48 PM   #1
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Power needed to run water maker.

Just wondering how I would power a watermaker?

The one I am thinking of says 230v @ 14-16amps
Initially I thought I could run it when the engines are running but then I thought I would be better off with a Honda Genny, but I have my doubts about that even though they supposedly have 15 amp plugs.

Any advice from those running one gratefully received
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Old 08-25-2014, 03:57 PM   #2
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Our 700 GPD (Rated) draws about 14.5-15 amps @ 110v.
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Old 08-25-2014, 04:11 PM   #3
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Our 700 GPD (Rated) draws about 14.5-15 amps @ 110v.
and you run it how?

The one I am looking at is 65 GPH
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Old 08-25-2014, 04:25 PM   #4
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230v at 16a is 3.7kW, and that's with no margin for induction motor startup. 65gph is a big unit. Note the other post was in gpd, or gallons per day.
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Old 08-25-2014, 04:54 PM   #5
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and you run it how?



The one I am looking at is 65 GPH

If we want to use it underway we turn some of the AC's off, then switch it on since our 12kw can't accommodate all 5 AC's and the water maker. We usually just run it at the dock since we run dual 50A cords, which allows us to run everything simultaneously including washer and dryer.
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Old 08-25-2014, 05:18 PM   #6
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Took a look at the Honda generator that could produce 4kw at 220 volts and they are big units. I will be interested in how you configure this set-up. Curious as well as to the need for a 65 gallon (US or Imperial?) per hour output.
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Old 08-25-2014, 05:25 PM   #7
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Curious as well as to the need for a 65 gallon (US or Imperial?) per hour output.
The need was based on the $1500 purchase price.
I was keen when listed at $2500, keener again when the price dropped to $2000
and this morning was going to pull the trigger when it dropped to $1500

Doesn't matter now, it was sold almost instantly.

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Old 08-25-2014, 08:19 PM   #8
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A watermaker that is a LOT bigger than you need (and 65 gph probably is) may not be a bargain because you need some hefty wiring and a big generator to run it. Regardless of output, they all need around 800psi to operate, so all you get for the extra layout is filling your tanks in 2 hours instead of 5.
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Old 08-25-2014, 11:38 PM   #9
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Hmm, why didn't the guy have an auction starting at $1500?

I run a Newport 400, 16.5gph. They are DC only which is a plus, and mine draws 26A at 12V on full power. It also has a low power operation mode, and output is reduced. Not sure what the draw is then. Its a great unit, but crazy prices here in Oz. Fortunately I had it installed before I shipped the boat back.
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Old 08-26-2014, 06:34 AM   #10
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I run a Newport 400, 16.5gph. They are DC only which is a plus, and mine draws 26A at 12V on full power. .
Bay Pelican also has a Newport 400 (Spectra). Runs off the battery bank for first two and one-half (or three and one/half) hours then I turn on the generator for the last half hour and charge up the batteries.
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Old 08-26-2014, 06:58 AM   #11
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If you need lots of water really quick, there are belt driven units that could be installed on the noisemaker .
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