<div dir="ltr">Allan - my understanding is that with a 2-wire pump, the start capacitor is integrated into the pump housing, underwater. I've never dealt with a 2-wire pump either....my experience has been with start capacitors in 3-wire pumps being located conveniently above ground in the pump control enclosure.<br><div class="gmail_extra"><br clear="all"><div><div class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><span style="font-size:12.8000001907349px">Dan Fink</span><div style="font-size:12.8000001907349px">Adjunct Professor of Solar Energy Technology, Ecotech Institute</div><div style="font-size:12.8000001907349px">IREC Certified Instructor\u2122 for: </div><div style="font-size:12.8000001907349px">~ PV Installation Professional</div><div style="font-size:12.8000001907349px">~ Small Wind Installer</div><div style="font-size:12.8000001907349px">Executive Director, Buckville Energy</div><div style="font-size:12.8000001907349px">NABCEP Registered Continuing Education Providers\u2122<br><a href="tel:970.672.4342" value="+19706724342" style="color:rgb(17,85,204)" target="_blank">970.672.4342</a></div><br> </div></div></div></div></div></div></div></div></div></div>
<br><div class="gmail_quote">On Sat, Dec 10, 2016 at 3:02 PM, Allan Sindelar <span dir="ltr"><<a href="mailto:allan@sindelarsolar.com" target="_blank">allan@sindelarsolar.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div style="background-color:rgb(255,255,255);color:rgb(0,0,0)" bgcolor="#FFFFFF" text="#000000">
Dan,<br>
I have never had to work with a two-wire pump, so I'm on shaky
ground here, but I refer back to what I learned years ago from
Windy. The third wire in a three-wire pump carries the starting
surge from the capacitor. A two-wire pump lacks this, and thus gets
its entire surge-under-load from the AC source. This will be
intrinsically difficult for an inverter, as compared to grid. So
Shasta's surge question below is relevant. I'd determine both
instantaneous surge and voltage drop; it may be that the combination
- of battery voltage leading to reduced AC from the Magnum, voltage
drop on the wires, and simply using the Magnum - will keep it always
problematic. <br>
<br>
Years ago, when Dankoff Solar Products was in its prime as a
distributor, Phil U did a load capacity test on various inverters of
the time, including the Magnum MS4024. It had remarkably strong
surge capacity, but did this by allowing a much greater voltage drop
- down to around 80 VAC, if I recall, on a 120 VAC inverter. <br>
<br>
You may be dealing with a structural issue, for which upgrading the
pump may be the best solution. <br>
Allan<br>
<br>
<div class="m_-2136157735456175019moz-signature">
<div class="m_-2136157735456175019WordSection1">
<p class="MsoNormal"><b>Allan Sindelar</b><br>
<span style="font-size:10.0pt"><a href="mailto:allan@sindelarsolar.com" target="_blank">allan@sindelarsolar.com</a></span><br>
<span style="font-size:10.0pt">NABCEP Certified PV
Installation Professional<br>
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New Mexico EE98J Journeyman Electrician<br>
Founder (Retired), <span>Positive
Energy,
Inc.</span><br>
<b><a href="tel:(505)%20780-2738" value="+15057802738" target="_blank">505 780-2738</a> cell</b><br></span></p></div></div></div></blockquote></div></div></div>