Cruisers Forum
 


Join CruisersForum Today

View Poll Results: watermaker
PUR 35 5 10.64%
PUR 40 9 19.15%
Waterlog 200 0 0%
Other 34 72.34%
Multiple Choice Poll. Voters: 47. You may not vote on this poll

Reply
 
Thread Tools Rate Thread Display Modes
Old 23-02-2008, 22:15   #31
Registered User

Join Date: Feb 2008
Location: BVI
Boat: Leopard 45, 45 feet, Jet Stream
Posts: 84
Send a message via Skype™ to Tim Schaaf
The PUR/Katadyne made about 30-35 gallons per day, depending upon voltage. I would run it for about five hours per day and supported my whole system with about 330 watts worth of solar panels. The watermaker drew 4 amps at 12 volts, so its total draw was about 20 amp hours per day. It was always easy to run off the batteries, whether the sun was up or down, or the engine on or off. I did not have a generator on that boat.

Currently, since we are a good sized charter cat, we have a 9KW NorPro generator. The Spectra Catalina, 300 gpd, would actually make that amount, or a little less, depending on the state of charge of the batteries. Our battery bank is large, 900 amp hours, and the watermaker would happily run all night ( or day) on battery power alone. Current draw was about 16-18 amps and it was very nice not to have to run any engines or generators in order to make water. Recently, we replaced the smallish Bodine motor with a much larger, and slightly less efficient Leeson, and we upgraded the pump head to a size that is rated at 400 gpd. It will actually make that amount off the batteries, but draws 24-26 amps so will not run all night on its own. The problem is not with the overall draw, but that the current causes a voltage drop, while running, that activates our low voltage cut-out after a few hours. However, the cut-out is cutting out at too high a voltage, so I am about to sort that out. At that point, I would not be surprised to see the unit run all night, if necessary. Of course, as the voltage drops, so does the output, but at its lowest, it still gets 14-16 gallons per hour. If the generator is running (and the batteries are being charged, we have seen as much as 18 gallons per hour. We do coordinate the watermaker use with the genset, but since we have to make about 12 hours of water per day while on charter, we do run off the batteries quite a bit. It should be noted that both the Pur and the Spectra are extremely efficient units, and most AC driven units use as much as ten times the power per gallon. Hope this helps.
__________________

__________________
Tim Schaaf is offline   Reply With Quote
Old 24-02-2008, 06:05   #32
Registered User

Join Date: Oct 2006
Location: New England summers Eastern Caribbean winters
Boat: Radford 450 45' Vamoose
Posts: 61
Lady Hawk
Thanks for the reply. My generator running full on can not supply enough amps to keep the watermaker running full strength. The generator is only 3.5kw and I have four 80 watt solar panels. Does your watermaker run on ac or dc current? Ours is ac.
__________________

__________________
minisailor is offline   Reply With Quote
Old 26-02-2008, 06:26   #33
Moderator Emeritus
 
GordMay's Avatar

Join Date: Mar 2003
Location: Thunder Bay, Ontario - 48-29N x 89-20W
Boat: (Cruiser Living On Dirt)
Posts: 31,577
Images: 240
If you have the Sea Recovery “AQUA MATIC”, you’ll need about 6 KW of power.
Sea Recovery Aqua Matic Watermaker Specifications

"AQUA WHISPER": about 4 KW
__________________

__________________
Gord May
"If you didn't have the time or money to do it right in the first place, when will you get the time/$ to fix it?"



GordMay is offline   Reply With Quote
Reply

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Spectra Watermakers Rod Plumbing Systems and Fixtures 42 22-02-2010 21:02
watermakers and generators JOSELU Plumbing Systems and Fixtures 0 15-03-2004 04:06



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 19:12.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.