SOLICITED EMAIL ON PERFORMANCE OF 240 DML WATERMAKER & POWER USAGE - SOLAR PANELS ENOUGH FOR ALL NEEDS - July 2011
"When I run the water maker I am using about 25 amps (2.3 amps/gal.) ... "
From: Will [mailto:will@imanse.ca]
Sent: July-01-11 12:42 PM
To: 'Will Curry'
Subject: RE: Follow up on Water Maker Membrane.
Hi Will
I run 6- 50 watt panels on an arch so they get good sun. They give me 15 amps plus for about 4 to 5 hours most days, with a daily total of about 90 to 100 amp hours. When I run the water maker I am using about 25 amps (2.3 amps/gal.) for about 3 hours every other day for a total of about 75 amp hours. Currently it is almost 2 o’clock in the afternoon, and we are charging at 16 amps. It should keep that up till about 3:30 or so when it usually starts tapering off. My panels are flat mounted but with the performance I am getting I am not even worried about trying to articulate them.
About the only other system that takes a bit of power is the refrigerator, but since it is a Frigoboat system it only runs about 10 to 12 minutes an hour at about 3 amps. So that only works out to about 15 amp hours a day. All my lights are LED so they do not even count.
We always seem to have lots of power left over, to such an extent that my wife will even run the bread maker off the inverter. Except in very cloudy conditions, we have never run out of power.
We do not skimp on water at all and even have showers every day. When we are swimming we also do a rinse off each time. This has been working out to about 15 gallons a day average, but we have done periods of as high as 20.
Hope this info helps.
Will
UNSOLICITED EMAIL RECEIVED OCTOBER 2008
"Four years in which we slowly sailed the Pacific, often staying in remote and uninhabited anchorages, as long as we want, without any concern in areas where the only drinkable liquid comes from coconuts."
"....... shower two times a day turned from luxury into normal."
Subject: Unser Watermaker
Kind regards,
Peter and Ulla Lütze on SY”LOVINA” in Singapore
"....still performs perfectly."
Update June 2007 - The watermaker still performs perfectly. We have learnt that the filters need changing more frequently than recommended but they are so cheap that this is not a problem.

From: Hanspeter Wehrli [mailto:hns154es@yahoo.com]
Sent: Wednesday, February 08, 2006 3:44 PM
To: John Curry
Subject: Re: Request for reference re Echo Tech water maker

"We are very pleased ....."
From: Paul von Wiese [mailto:paulvonwiese@gmail.com]
Sent: Thursday, February 09, 2006 10:57 AM
To: John Curry
Subject: Re: Request for reference re Echo Tech water maker
Sent: Saturday, February 18, 2006 9:43 AM
To: John Curry
Subject: Re: Request for reference re Echo Tech water maker
From: Peter Colman [mailto:yachtmendana@fastmail.com.au]
Sent: Thursday, March 02, 2006 3:23 PM
To: John Curry
Subject: Re: FW: Echo tech watermaker - Due Diligence
John Kirkus
s/y Bluesipp
From: Alba@zap-email.com
To: echotec@echo-marine.com
Subject: ECHO Tec. Watermaker
Carl Bernhardt
S/V My Dream
John Van Logchem
I calculated the cost of water from all other available sources neglecting the chance of collecting rainwater, which is quite small on the island, particularly in the dry season. I amortised the capital cost over a period of 10 years, taking into account daily running costs and preventive and corrective maintenance costs. The resulting calculations indicated that the system would meet my requirement to provide precious water for human consumption, household and building needs.
The installation needed a strong sea-water feed pump in order to overcome the 40 feet height from the sea and restrictions of the sand and cartridge pre-filter. The rocky coast made it impossible to locate the entire plant close to the sea level. A small pump house was built as near to the sea as practicable. The seawater is supplied via a sandfilter to the standard factory fabricated desalination plant, which includes the pre filter, the high-pressure pump, the RO membranes and the control unit.
I have used the system for more than four years for between 10 and 24 hrs per day to supply water for normal household and building needs and finally a 15000sq. ft. garden maintenance with lawns, fruit trees and vegetable garden. My average fresh water production is 700 gallons per day, for a total of over 1 million gallons to date.
The system has been very reliable. Careful attention to the regular oil change, (for the high pressure pump), normal consumable replacement at intervals, e.g. cartridge filters and RO membranes, is all that is required to maintain a high quality of product water.
The capital cost of my desalination plant was completely 'paid for' by the non-purchase of shipped water in the first 9 month period only. There are now many others on the Island whom have taken my initiative. Access to seawater is essential of course and only owing land too far from the sea has prevented some homeowners from taking advantage of this exciting and economical supply of clean water on command.
Colin Schofield