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<div class="moz-cite-prefix">I haven't seen anyone mention the
battery bank. If I understand correctly, there's a single string
of sealed<br>
L16 batteries on this inverter. I have my doubts as to whether or
not that bank can provide the high current<br>
the inverter needs to start this load.<br>
<pre class="moz-signature" cols="72">Roy Butler
NABCEP Certified Solar PV Installer®
NYSERDA eligible PV & wind installer
IREC Certified Master Trainer™ for Small Wind Installer
Four Winds Renewable Energy, LLC
8902 Route 46, Arkport, NY 14807
607-324-9747 <a class="moz-txt-link-abbreviated" href="http://www.four-winds-energy.com">www.four-winds-energy.com</a>
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</pre>
On 7/2/2014 2:10 PM, Jason Szumlanski wrote:<br>
</div>
<blockquote
cite="mid:CAJJtG3qM=DzOUqkGVdnwnAd2_eicBGNDuyZ=_qmdTt1dSbze8g@mail.gmail.com"
type="cite">
<div dir="ltr">
<div class="gmail_default"
style="font-family:verdana,sans-serif">To further qualify my
statements, the inverter will start the pump without issue,
but I should echo the warnings by others that if there are
other loads present, especially other motor loads that could
start ​concurrently, you may experience issues. As long as
your customer understands the limitations and possibilities,
you may be just fine.</div>
<br>
<br>
<div id="WISESTAMP_SIG_gmail_session"
href="http://WISESTAMP_SIG_gmail_session">
<div
style="font-size:13px;font-family:Verdana,Arial,Helvetica,sans-serif">
<div style="margin:0 0 8px 0">
<p style="margin:0"><span><span>Jason Szumlanski</span></span></p>
<p style="margin:0"><span><span></span></span></p>
<div class="gmail_default"
style="font-family:verdana,sans-serif;display:inline">​
Fafco Solar​</div>
<br>
</div>
</div>
<img moz-do-not-send="true"
src="http://ws-stats.appspot.com/ga/pixel.png?yes__count=true%20&e=legacy_impression"></div>
<div class="gmail_extra"><br>
<br>
<div class="gmail_quote">On Wed, Jul 2, 2014 at 11:00 AM,
Jason Szumlanski <span dir="ltr"><<a
moz-do-not-send="true"
href="mailto:jason@fafcosolar.com" target="_blank">jason@fafcosolar.com</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr">
<div style="font-family:verdana,sans-serif">For what
it's worth, I've run a single speed 1.5HP pool pump
with a MS4448PAE in a mobile application on a 38.4kWh
battery bank (sixteen Rolls S-530's). I have also run
a 2.5HP Hayward EcoStar Variable Speed pool pump at
full RPM, but that startup current is likely less than
you well pump.</div>
<div style="font-family:verdana,sans-serif"><br>
</div>
<div style="font-family:verdana,sans-serif">I'm going to
guess your 3/4HP well pump will be a breeze to start
with this inverter.</div>
<br>
<br>
<div href="http://WISESTAMP_SIG_gmail_session">
<div
style="font-size:13px;font-family:Verdana,Arial,Helvetica,sans-serif">
<div style="margin:0 0 8px 0">
<p style="margin:0"><span><span>Jason Szumlanski </span></span></p>
<p style="margin:0"><span><span></span></span></p>
<div
style="font-family:verdana,sans-serif;display:inline">​
Fafco Solar​</div>
<br>
</div>
</div>
</div>
</div>
<div class="gmail_extra"><br>
<br>
<div class="gmail_quote">
On Wed, Jul 2, 2014 at 10:47 AM, Allan Sindelar <span
dir="ltr"><<a moz-do-not-send="true"
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">
<div>Drake,<br>
As a normal CYA, I'll always gently let a
customer know that this (or any) particular
combination of inverter and load sometimes
proves incompatible, just in case the unexpected
happens. (We once had a MS4448 that would not
reliably start and run a condensing boiler; a
switch to a different boiler resolved the
issue.)<br>
<br>
Having said that note of caution, I wouldn't
give it any concern. 3/4 HP and 1 HP well pumps
have never been an issue; I would expect 1.5 HP
to be easy to run. At 2 HP I'd be asking these
questions here. <br>
<br>
You might check that it's a 3-wire,
capacitor-start motor, but nowadays nearly all
are. Two-wire pumps (with no control box) can
add 50% to the surge.<br>
<br>
The Magnum has a fairly poor voltage regulation
response. Sometimes the AC voltage can drop to
~80 VAC momentarily. So you might also caution
your customer that the lights may flicker when
the pump starts. In our home we know whenever
our Kenmore fridge turns on.<br>
<br>
Allan<br>
<br>
<div>
<div>
<p class="MsoNormal"><b>Allan Sindelar</b><br>
<span style="font-size:10.0pt"><a
moz-do-not-send="true"
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>
NABCEP Certified Technical Sales
Professional<br>
New Mexico EE98J Journeyman Electrician<br>
Founder (Retired), <span>Positive
Energy, Inc.</span><br>
<b><a moz-do-not-send="true"
href="tel:505%20780-2738"
value="+15057802738" target="_blank">505
780-2738</a> cell</b><br>
<br>
</span></p>
<p class="MsoNormal"> </p>
</div>
</div>
<div>
<div> On 7/2/2014 8:17 AM, Drake wrote:<br>
</div>
</div>
</div>
<blockquote type="cite">
<div>
<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>
<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>
<li>Does the surge current need to equal
locked rotor. How long must the inverter
meet its required maximum surge? </li>
<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>
<a moz-do-not-send="true"
href="tel:740-448-7328"
value="+17404487328" target="_blank">740-448-7328</a><br>
</i><a moz-do-not-send="true"
href="http://athens-electric.com/"
target="_blank">http://athens-electric.com/</a> </div>
</div>
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</blockquote>
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