[RE-wrenches]

[Doug Pratt]

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Hey Dave. I've sold a lot of the SQ Flex pumps, and haven't had any problems
yet. I love the W.I.D.E 30 to 300 volts DC window. Want more water? Add a
module. Want still more? Add another module or two. No sun? Tote your little
1400-watt generator out there. This is the most adaptable pump I've ever
seen, plus it's very high efficiency, and has a long 15 year or better life
expectancy. Two potential problems. If they run dry, they'll melt the rubber
sleeve. There's a built-in level sensor on the wiring pigtail, but in wells
with iron bacteria the scum build-up can fool the sensor. The other problem
is the price just keeps going up and up. 

No experience with Windy's new pump, sorry.

Sounds like you'd get along fine with just a modest 40-gallon pressure tank.

Cheers,
Doug Pratt 

-----Original Message-----
From: David Palumbo, Independent Power & Light [mailto:ipl at sover.net] 
Sent: Sunday, April 24, 2005 2:59 PM
To: RE-wrenches at topica.com
Subject: RE: [RE-wrenches]


I have a potential job for a PV powered water pump at a nursery business.
Grid power is present but they like the idea of using solar to do their
irrigation. It is a modest sized operation, the owner estimates water use of
1,000 to 2,000 gallons of water per day.

They had a well drilled last week. 160' deep, 9.5 gpm, static water level -
overflowing now.

I'm looking at the new Dankoff "Lorentz" pumps, and the Grundfos SQ Flex.

An advantage to the SQ Flex would be the ability to run it on the grid power
(when the solar is lacking) that is a short distance from the well.

Is it also worth considering eliminating the storage tank in this case? Just
have a pressure tank setup with irrigation pipelines controlled with on/off
valves? It will be a summertime only deal and need to be setup as a drain
back system.

Any ideas? Experience with either the Lorentz or the Grundfos SQ Flex.

Dave Palumbo

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