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Bill,<br>
I have always used the CU200 ("Sorry, sir, that's what it costs to
give you what you want...") when a float switch is called for (which
is nine times out of ten) so I haven't done this, but:<br>
The only alternative to their proprietary product would be a means
to break the incoming AC or DC feed to the pump. That means placing
the float switch in line with the power supply ahead of the pump. A
conventional float switch is likely to arc and soon fail, possibly
closed. A mercury-switch float switch, intended for non-potable
applications, would function at high DC voltages. I'm extrapolating
this from memories of MDI (Mercury Displacement Industries) being
used to control PV input DC on the APT/Ananda Powercenters of yore.
The catch is that by including mercury, they can't meet standards
for potable water. So if this is for a regulated facility like a
public well it won't fly, but for a private homeowner you might
offer it as a practical solution. (I used them a number of times in
other pump applications before I learned of the potable/non-potable
distinction, and never had one fail.)<br>
Allan<br>
<br>
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<p class="MsoNormal"><b>Allan Sindelar</b><br>
<span style="font-size:10.0pt"><a
href="mailto:allan@sindelarsolar.com"><a class="moz-txt-link-abbreviated" href="mailto:allan@sindelarsolar.com">allan@sindelarsolar.com</a></a></span><br>
<span style="font-size:10.0pt">NABCEP Certified PV
Installation Professional<br>
NABCEP Certified Technical Sales Professional<br>
New Mexico EE98J Journeyman Electrician<br>
Founder (Retired), <span style="mso-bidi-font-weight:bold">Positive
Energy,
Inc.</span><br>
<b>505 780-2738 cell</b><br
style="mso-special-character:line-break">
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<div class="moz-cite-prefix">On 4/20/2016 8:36 PM, Bill Hennessy
wrote:<br>
</div>
<blockquote
cite="mid:1857313702.4862725.1461206212629.JavaMail.yahoo@mail.yahoo.com"
type="cite">
<div style="color:#000; background-color:#fff;
font-family:verdana, helvetica, sans-serif;font-size:16px">
<div id="yui_3_16_0_ym19_1_1461029964788_150130"><span
id="yui_3_16_0_ym19_1_1461029964788_150170">Hi folks--</span></div>
<div id="yui_3_16_0_ym19_1_1461029964788_150171"><br>
<span id="yui_3_16_0_ym19_1_1461029964788_150170"></span></div>
<div dir="ltr" id="yui_3_16_0_ym19_1_1461029964788_150172">Can
anyone recommend a non-factory, inline float switch for a
Grundfos pv-powered submersible? Not interested in paying the
$350 for the Grundfos controller.</div>
<div id="yui_3_16_0_ym19_1_1461029964788_150247" dir="ltr">The
float switch contacts will need to handle the arcing of about
120 VDC.<br>
<span id="yui_3_16_0_ym19_1_1461029964788_150170"></span></div>
<div id="yui_3_16_0_ym19_1_1461029964788_150208"><br>
<span id="yui_3_16_0_ym19_1_1461029964788_150170"></span></div>
<div id="yui_3_16_0_ym19_1_1461029964788_150266"><span
id="yui_3_16_0_ym19_1_1461029964788_150170"></span></div>
<div id="yui_3_16_0_ym19_1_1461029964788_150131"> </div>
<div id="yui_3_16_0_ym19_1_1461029964788_150150"
class="signature">
<div id="yui_3_16_0_ym19_1_1461029964788_150149">Bill Hennessy<br>
Berks Solar, LLC<br>
371 Centennial Rd<br>
Mertztown, PA 19539<br>
<br>
o 610 682 4300<br>
c 484 560 4666<br>
NABCEP certified installer<br>
PA contractor #44411<br>
<a class="moz-txt-link-abbreviated" href="http://www.berkssolar.com">www.berkssolar.com</a></div>
</div>
<div id="yui_3_16_0_ym19_1_1461029964788_150163"
class="y_msg_container"><br>
</div>
<div class="qtdSeparateBR"><br>
<br>
</div>
<div style="display: block;"
id="yui_3_16_0_ym19_1_1461029964788_150155"
class="yahoo_quoted">
<div id="yui_3_16_0_ym19_1_1461029964788_150154"
style="font-family: verdana, helvetica, sans-serif;
font-size: 16px;">
<div id="yui_3_16_0_ym19_1_1461029964788_150153"
style="font-family: HelveticaNeue, Helvetica Neue,
Helvetica, Arial, Lucida Grande, sans-serif; font-size:
16px;"> </div>
</div>
</div>
</div>
<br>
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<br>
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