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Hi Mac,<br>
<br>
It has been a while since I kept up with pumping applications;
however, the last time I looked, using electronically commutated
motors (ECM) offered significant energy savings over other types. My
understand is that the voltage tolerances must be tightly controlled
to allow the ECM to reach it's design life. Perhaps offerings/ECM
technology have improved today?<br>
<br>
Best wishes,<br>
<pre class="moz-signature" cols="72">Bill Loesch
Solar 1 - Saint Louis Solar
314 631 1094</pre>
<div class="moz-cite-prefix">On 05-May-15 9:36 AM, Mac Lewis wrote:<br>
</div>
<blockquote
cite="mid:CAOABG48V86GEd-km_jo6MBmyNyCvM7vRNxSRVJ0JgY-DOPBdwg@mail.gmail.com"
type="cite">
<div dir="ltr">Hello wrenches,
<div><br>
</div>
<div>I've got an off-grid pumping application question. The
scenario is 400' of head, with needs of about 1400-2500
gallons per day. We are trying to pump from a low pond on the
property to a high pond on the property, for pressurized water
delivery all over the property. I can do a solar direct pump
quite easily and serve this need. However, I'm also
interested in efficient AC pumping options. </div>
<div><br>
</div>
<div>He is currently undergoing an remodel and considering
upgrading his off-grid equipment and bulking up his system.
It may make sense to do an efficient AC pump and put the money
saved by going with an AC pump, into his off grid system
upgrade.</div>
<div><br>
</div>
<div>What are some pumps worth looking at for this application?
</div>
<div>Does anyone know the efficiency of an SQFlex pump operated
in AC mode? I can't find it in the literature.</div>
<div><br>
</div>
<div>Thanks in advance</div>
<div>
<div><br>
</div>
-- <br>
<div class="gmail_signature">
<div><br>
</div>
<div><font color="#305A78" face="'times new roman', serif"><br>
</font></div>
<div><br>
</div>
Mac Lewis<br>
<br>
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Arial, Helvetica, sans-serif"><span
style="font-size:small"><span
style="font-family:arial;font-weight:normal;color:rgb(48,90,120)"><font
face="'times new roman', serif">"Yo solo sé
que no sé nada." </font><span
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face="'times new roman', serif">-Sócrates</font></span></span></span></font></p>
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<br>
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