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Old 04-01-2009, 23:27   #16
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for 100 gals @1.5 gal/ah that is 66 ah/7 or about 10 ah per day. would need about 40watts of panels. That is actually quite a good number if only 100 gal per week is feasable. I was going to put an engine driven to make water twice a week and give batts an extra boost at the same time. May have to rethink now.
Question is 100 gal/ week ok

Sorry got that all wrong 4 amps all day for 40 gal is 100 amps or 2.5 amps per gallon would need more like 100watts of panels. Back to the engine drive
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Old 05-01-2009, 13:41   #17
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Timing is everything. Here is a link to an article related to this thread:
Toast Floats

Cheers.
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Old 05-01-2009, 14:14   #18
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Timing is everything. Here is a link to an article related to this thread:
Toast Floats

Cheers.
You beat me to it! I was just going to post a link to Toast's blog
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Old 05-01-2009, 14:21   #19
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Great Minds!
And the best part of the reference is keeping up with Toast and Crew.
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Old 05-01-2009, 15:32   #20
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Jeez, we must be roughing it. The wife unit and I regularly last 4 weeks on our 100 gallons without foregoing daily showers to rinse the salt off. We've stretched it as long as 6 weeks down in the Acklins and Ragged Islands when we didn't feel like finding civilization.

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Old 05-01-2009, 16:29   #21
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Basically with a watermaker you'll use all you can make, we make 150l/hr, we shower whenever we feel like run the washing machine daily and I'm even going to tap it into my deckwash so i can wash the boat in Freshwater, recently in Vanuatu a fellow cruiser who was relying on non existent rain for his supply, tied along side us and over a few beers we filled his tank for him, my advice fit the biggest capacity watermaker you can afford to build
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Old 05-01-2009, 16:38   #22
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Yea, my engine drive made 25 GPH which meant if I motored to port for 6 hours I'd make 150 gallons and then made 25 gallons a day while charging the batteries with my engine. The added benefit was that between charging and watermaking, it kept the main engine loaded up pretty good... which is good for it. When you think about it, the main engine is still the easiest, simplest, cheapest and "keep the boat uncluttered-est" power plant for electricity and water...
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Old 06-10-2009, 16:54   #23
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make the most you can on a daily basis with the least power

My logic is closely mirrored by the previous posts but I can't help but throw in a "I knew I was right all along" comment.
I built my own, using a pressure washer pump rated at 8 gpm and then sized the upstream and downstream plumbing to handle 10 gpm. I use the engine driven option since I often run the engine while leaving and arriving and manuvering as necessary so it's easy to run it an hour or two a day.
It's plenty big enough for me at 160gpd capacity.
Although I've seen some really NICE home built untis, with electronics to handle flushing, automatic ppm sampling and divertor valves, mine is all manual. read the gauges, turn the valves, taste the outflow and when it's right, fill the tanks.
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