<div dir="ltr"><div class="gmail_default" style="font-family:verdana,sans-serif">Dave,</div><div class="gmail_default" style="font-family:verdana,sans-serif">When my El Sids started failing years ago, I spoke with Dan and he recommended a voltage regulator to prevent the fluctuations and spikes. I installed one which seemed to help, but did not stop the failures. My memory is that he didn't have much else to say at the time other than there must have been a problem in the system. My impression was they were susceptible to voltage excursions more than the average. None-the-less, I need to find a different efficient pump that doesn't cost $300 a pop. I've seen some imported DC pumps that are very inexpensive - even if they don't last a long time, perhaps that may work for now.</div><div class="gmail_default" style="font-family:verdana,sans-serif">Howie<br clear="all"></div><div><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><span><span><font color="#888888"><span style="color:rgb(120,63,4)"><b>Howie Michaelson<br></b></span><span style="color:rgb(0,0,255)"></span></font></span></span><span><span><span><span><font color="#888888"><span style="color:rgb(106,168,79)"><b>Sun Catcher</b></span><br><span style="color:rgb(68,68,68)"><span style="background-color:rgb(255,255,255)"><font size="2">
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<p>Talk to Dan at Ivan and see what he says. There was not a website really (last time I looked) but here is the number</p>
<p> ivan labs 561-747-5354 Talk with Dan</p>
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<pre><strong><span style="font-size:small">Dave Angelini Offgrid Solar
"we go where powerlines don't"
<a href="http://members.sti.net/offgridsolar/" target="_blank">http://members.sti.net/offgridsolar/</a>
e-mail <a href="mailto:offgridsolar@sti.net" target="_blank">offgridsolar@sti.net</a>
text 209 813 0060</span></strong></pre>
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<p>On Wed, 16 Sep 2020 09:55:31 -0600, Ray <<a href="mailto:ray@solarray.com" target="_blank">ray@solarray.com</a>> wrote:</p>
<blockquote type="cite" style="padding-left:5px;border-left:2px solid rgb(16,16,255);margin-left:5px;width:100%">
<p>I've always suspected that one of the issues was the variable voltage of DC systems. Batteries get low, and the current increases quite a bit, cold weather or EQing and the voltage can get really high and cause problems. The total variation just seems to take out a fair bit of both brushes and controls. This is just my long standing theory however, and I don't have Lab results.</p>
<p>I actually had similar problems on 120 vac, when I lived on the edge of the grid. Voltage varied from 90 to 145 vac, and cooked quite a few things like washing machine controls (every 3 months or so) Once I put in a backup power system to protect those circuits, the controls lasted for a decade. </p>
<pre>Ray Walters
Remote Solar
303 505-8760</pre>
<div>On 9/15/20 10:29 PM, Sindelar Solar wrote:</div>
<blockquote type="cite" style="padding-left:5px;border-left:2px solid rgb(16,16,255);margin-left:5px;width:100%">
<p>This has been my experience as well, although I can't give such specific rationale as to why the El Sids failed - the electronics just usually and eventually fail in my battery-based hydronic system. The Marches just eventually wear out.</p>
<p>Allan</p>
<div>On 9/15/2020 9:57 PM, Howie Michaelson wrote:</div>
<blockquote type="cite" style="padding-left:5px;border-left:2px solid rgb(16,16,255);margin-left:5px;width:100%">
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<div class="gmail_default" style="font-family:verdana,sans-serif">Dave,</div>
<div class="gmail_default" style="font-family:verdana,sans-serif">I used to use El Sids a lot in SHW systems with direct PV drive for the glycol circulation. I've long stopped installing SHW, but have used them in off grid hydronic heat systems as well. The electronics have failed on many of these pumps over the years. They seem particularly intolerant of higher voltages, even small ones, which if they are being driven off battery voltage, is hard to avoid. None-the-less while I really liked the El Sids, they were too expensive to have as many failures as they did. I'm familiar with March pumps as well, but they always seem to fail prematurely as well, for even more money. I was hoping there might be a suitable replacement for a somewhat less expensive alternative.</div>
<div class="gmail_default" style="font-family:verdana,sans-serif">Howie</div>
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<div class="gmail_attr" dir="ltr">On Tue, Sep 15, 2020 at 10:29 AM Dave Angelini Offgrid Solar <<a href="mailto:offgridsolar@sti.net" target="_blank">offgridsolar@sti.net</a>> wrote:</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<p>Why did the El Sid fail? The one way I have seen them fail, and any pump for that matter is rain water that has (for some reason) lower than a normal PH. Below from wiki.</p>
<p><span>Normal, clean rain has a </span><strong>pH</strong><span> value of between 5.0 and 5.5, which is slightly acidic. However, when rain combines with sulfur dioxide or nitrogen oxides\u2014produced from power plants and automobiles\u2014the rain becomes much more acidic. Typical acid rain has a </span><strong>pH</strong><span> value of 4.0.</span></p>
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<pre> </pre>
<pre><strong><span style="font-size:small">Dave Angelini Offgrid Solar
"we go where powerlines don't"
<a href="http://members.sti.net/offgridsolar/" target="_blank">http://members.sti.net/offgridsolar/</a>
e-mail <a href="mailto:offgridsolar@sti.net" target="_blank">offgridsolar@sti.net</a>
text 209 813 0060</span></strong></pre>
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<p>On Mon, 14 Sep 2020 23:49:35 -0400, Howie Michaelson <<a href="mailto:Howie.Michaelson@gmail.com" target="_blank">Howie.Michaelson@gmail.com</a>> wrote:</p>
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<div class="gmail_default" style="font-family:verdana,sans-serif">Hi All,</div>
<div class="gmail_default" style="font-family:verdana,sans-serif">I need to replace 3-5 El Sid pumps I'm using in a low volume hydronic heating system. Other than laing pumps, are there any recommendations for 12, 24, or 48 vDC pumps? Having magnetic drives that mate with the impeller body of the El Sids, would be a bonus.</div>
<div class="gmail_default" style="font-family:verdana,sans-serif">Thanks,</div>
<div class="gmail_default" style="font-family:verdana,sans-serif">Howie</div>
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<p class="MsoNormal" style="line-height:normal"><strong><span style="font-size:12pt">Allan Sindelar</span></strong><span style="font-size:12pt"><br> </span><a href="mailto:allan@sindelarsolar.com" target="_blank"><span style="font-size:10pt">allan@sindelarsolar.com</span></a><span style="font-size:12pt"><br> </span><span style="font-size:10pt">NABCEP Certified PV Installation Professional<br> New Mexico EE98J Journeyman Electrician<br> Founder (Retired), <span>Positive Energy, Inc<span>.</span></span><br> <strong>505 780-2738 cell</strong></span><span style="font-size:12pt"></span></p>
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