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<DIV><SPAN class=362575917-02072014><FONT face=Arial color=#0000ff size=2>Hi
Drake, </FONT></SPAN></DIV>
<DIV><SPAN class=362575917-02072014><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=362575917-02072014><FONT face=Arial color=#0000ff size=2>To
answer question "<FONT face="Times New Roman" color=#000000 size=3>does this
seem like a good combination" </FONT></FONT></SPAN><SPAN
class=362575917-02072014><FONT face=Arial color=#0000ff size=2>I would reply no.
</FONT></SPAN></DIV>
<DIV><SPAN class=362575917-02072014><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=362575917-02072014><FONT face=Arial color=#0000ff size=2><SPAN
class=362575917-02072014><FONT face=Arial color=#0000ff size=2>Keep in mind well
pumps often kick in concurrently with other large loads, washing machines,
dishwashers, etc. </FONT></SPAN></FONT></SPAN></DIV>
<DIV><SPAN class=362575917-02072014><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=362575917-02072014><FONT face=Arial color=#0000ff size=2>I'm
sure the MS 4448 PAE will start the pump ok, but forewarn customer of brownouts
when it starts. The Magnum inverters do not have near the surge capability of
the XW 6048 as an example. </FONT></SPAN></DIV>
<DIV><SPAN class=362575917-02072014><FONT face=Arial color=#0000ff
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=362575917-02072014><FONT face=Arial color=#0000ff size=2>One
option is the upgrade the pump to a more energy-efficient, soft start unit such
as the Grundfos SQFlex. </FONT></SPAN></DIV>
<DIV><SPAN class=362575917-02072014></SPAN><SPAN class=362575917-02072014><FONT
face=Arial color=#0000ff size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=362575917-02072014><FONT face=Arial color=#0000ff
size=2>Kevin</FONT></SPAN></DIV>
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<DIV class=OutlookMessageHeader dir=ltr align=left><FONT face=Tahoma
size=2>-----Original Message-----<BR><B>From:</B> RE-wrenches
[mailto:re-wrenches-bounces@lists.re-wrenches.org]<B>On Behalf Of
</B>Drake<BR><B>Sent:</B> July 2, 2014 7:17 AM<BR><B>To:</B>
RE-wrenches<BR><B>Subject:</B> [RE-wrenches] Magnum and
Pumps<BR><BR></FONT></DIV>Hello Wrenches,<BR><BR>We are hoping to use a Magnum
PAE 4448 to back up a household that includes a 3/4 HP deep well pump. There
is about 120 feet of vertical rise and about 1000 feet of horizontal distance.
<BR><BR>I have been told that there is a correlation between the locked rotor
current of a pump and the predictable ability of a specified inverter to power
that pump. <BR><BR>The plumber who installed the pump left no paperwork and
retained no records of what pump he put in the hole last year. He could only
say it was a 3/4 HP pump. We are therefore unable to obtain the manufacturer's
nameplate specifications.<BR><BR>The Magnum PAE 4448 has a 1 mS surge of 70 A
(at 240 V) and a 100 MS surge of 40 A. According to the NEC Table 430.251(A),
a 3/4 HP motor has a locked rotor current of 41.4 amps at 230 V. <BR><BR>This
inverter can surge at 35.4 A for 5 seconds. The specified battery bank will be
8 Full River L-16 AGMs. Can anyone say if:
<UL>
<LI>Is there enough information to know if this setup will handle the pump,
and if so, will it?
<LI>How can an inverter's ability to power a motor or pump be calculated by
knowing its locked rotor current? Which surge periods should be compared to
the locked rotor current?
<LI>Does the surge current need to equal locked rotor. How long must the
inverter meet its required maximum surge?
<LI>From experience with Magnums and pumps, does this seem like a good
combination? </LI></UL><BR>Thank you,<BR><BR>Drake <BR><BR>Drake
Chamberlin<BR><I>Athens Electric LLC<BR>OH License 44810<BR>CO License
3773<BR>NABCEP Certified Solar PV <BR>740-448-7328<BR></I><A
href="http://athens-electric.com/">http://athens-electric.com/</A>
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