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Hi Bill and all. Windy was having troubles getting this to post, so he
asked that I post it on his behalf:<br><br>
Bill,<br><br>
I agree, mostly, with Jay. The Shurflo may last 1-3 years and it is
difficult and expensive to rebuild. It's a diaphragm pump like an RV pump
and has a brush motor. When the diaphragm wears or breaks, it instantly
floods the motor. It's 1980's technology. But it is efficient for
low-flow rates.<br><br>
The Hober items that I see listed on their Alibaba site are "solar
pump inverters" designed to power conventional 3-phase AC pumps.
Jay explains, but I will cut to the chase You will need many more
PV watts than you should need, and it will pump MUCH more water than you
are calling for. The pump cannot be slowed down to match your needs
because that would kill its lift capacity. That is the essential nature
of conventional centrifugal pumps.<br><br>
You should look for a helical rotor (HR) submersible, also called a screw
pump. It is not a centrifugal pump. It is positive displacement, like the
Shurflo, and will have similar efficiency, excellent for low volume high
lift. HOWEVER, it is brushless and long lasting. Instead of a vibrating
diaphragm, it has a metal helical rotor, just one moving part.<br><br>
Lorentz and Grundfos SQ-Flex are the original successful HR submersibles,
but oversized and expensive for the low volume that you require.<br><br>
There are several Chinese companies making HR submersible solar pumps
that are smaller, and cheap. Some of them are very good. SunRotor in USA
sells good ones and stands by them.* <br><br>
Windy<br>
Dankoff Solar Pumps (retired)<br>
Co-Author Solar Water Pumping (for publication 2019)<br><br>
* My old motto:<br>
I stand behind my product. If I stand in front of it, it doesn\u2019t
work.<br><br>
William Dorsett wrote at 04:44 PM 1/2/2019:<br>
<br>
<blockquote type=cite class=cite cite="">
<font face="Cambria" size=4 color="#1F497D">Happy New Year
Wrenches</font> <font face="Cambria" size=4 color="#1F497D"> From a young
lady who is trying to bring clean water to a village in Uganda:<br>
</font><br>
<font face="Calibri" size=4>
</font> <font face="Calibri" size=4> This is Rosanna Bauman from
Garnett. I'd talked to you about 2 years ago about solar pumps for our
friends in Uganda. We installed the solar panels but are just now getting
the money saved up for the well-drilling. We have clean water located 75
meteers below, no rock. Looking at a Shur-flo or a Hober. We can get the
Hober shipped direct from China to Uganda DHL, plus it's about $200
less. However, we would like some advice as to their reliability.
We want something reliable. <br>
</font><br>
<font face="Calibri" size=4>Have any of your Solar Wrenches used or heard
of this company? Looking at using a 3000 liter/day pump to pump 1,000
liters, since it will be directly tied to solar power, no battery
back-ups.<br>
</font><br>
<font face="Calibri" size=4>You're welcome to call me if you have
questions!<br>
</font><br>
<font face="Calibri" size=4>Thanks!<br>
</font><br>
<font face="Calibri" size=4>
Rosanna
Bauman<br>
</font><br>
<font face="Cambria" size=4 color="#1F497D">Thanks</font>
<font face="Cambria" size=4 color="#1F497D">for your thoughts<br>
</font><br>
<font face="Calibri" size=4 color="#1F497D">Bill Dorsett<br>
</font><br>
<font face="Calibri" size=4 color="#1F497D"> </font>
<font face="Calibri" size=4 color="#76923C">Start where you are. Use
what you have. Do what you can</font>
<font face="Calibri" size=2 color="#76923C">Arthur Ashe<br>
</font><br>
<font face="Calibri" size=4 color="#1F497D">1715 Leavenworth<br>
</font><br>
<font face="Calibri" size=4 color="#1F497D">Manhattan, KS
66502<br>
</font><br>
<font face="Calibri" size=4 color="#0000FF"><u>
<a href="http://www.fhreec.org/">www.fhreec.org</a><br>
</u></font><br>
<font face="Calibri" size=4 color="#1F497D">785/539-1956 Office
<br>
</font><br>
<font face="Calibri" size=4 color="#1F497D">785/564-2583 Cell<br>
</font><br>
<font face="Calibri" size=4 color="#0000FF"><u>
<a href="mailto:wmdorsett@cox.net">wmdorsett@cox.net</a></u></font>
<font face="Calibri" size=4 color="#1F497D"> <br>
</font><br>
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