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I've run a 3 HP well pump off a pair of Outbacks, but make sure you
have plenty of battery behind it. We had shut downs from low
voltage, when the batteries were at 50% charge from the starting
surge. <br>
My experience with Magnum has been good, and they have even more
surge current than the Outbacks.<br>
Yet another thing to consider is changing the load. That saw might
work just fine with a 2 Hp motor.<br>
<br>
Ray<br>
<br>
<br>
<div class="moz-cite-prefix">On 10/14/2012 6:54 AM,
<a class="moz-txt-link-abbreviated" href="mailto:dan@foxfire-energy.com">dan@foxfire-energy.com</a> wrote:<br>
</div>
<blockquote
cite="mid:20121014055404.720a661d8db719b1f2ad39509c9edaa3.6ec2bd517f.wbe@email14.secureserver.net"
type="cite"><span style="font-family:Verdana; color:#000000;
font-size:10pt;">
<div>I like Outback because I can rebuild them on the wall. <span>
I'd be eying two VFX3648 (Or VFX7248 is what they used to
call them).<span id="GD__CURSOR"> I suspect Magnum is
similar, but I really haven't seen that many around. </span></span>As
for starting motor loads, NEC article 430 has gobs of info on
projecting starting currents and sizing conductors (Check out
the tables toward the end of the article). Keep in mind much
has to do with conductors sizing.<span> I'd be shooting for a
max loss of 3% at full current draw.. especially in the low
voltage conductors.<span id="GD__CURSOR"> </span></span>As
for installation, I like set ups where the inverters are
inclosed in a closet and set up so that the main fresh inlet
air to the building washes thru the closet (Powered by gravity
- no fans). Good luck. db<br>
</div>
<div><br>
</div>
<div><br>
Dan Brown<br>
Foxfire Energy Corp.<br>
Renewable Energy Systems<br>
(802)-483-2564<br>
<a moz-do-not-send="true" href="http://www.Foxfire-Energy.com">www.Foxfire-Energy.com</a><br>
NABCEP #092907-44</div>
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<br>
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-------- Original Message --------<br>
Subject: Re: [RE-wrenches] Off-grid 1nverter replacement for
3 HP<br>
From: "bob ellison" <<a moz-do-not-send="true"
href="mailto:reellison@gmail.com">reellison@gmail.com</a>><br>
Date: Sat, October 13, 2012 7:01 pm<br>
To: "'RE-wrenches'" <<a moz-do-not-send="true"
href="mailto:re-wrenches@lists.re-wrenches.org">re-wrenches@lists.re-wrenches.org</a>><br>
<br>
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<div class="WordSection1">
<div class="MsoNormal" style="font-size:12pt;"><font
color="#1f497d" face="Calibri" size="4"><span
style="font-size:14.0pt;font-family:"Calibri","sans-serif";color:#1F497D">I
have had inverters ruined by drywall dust, it
literally filled them within a couple years as the
owner worked on his house. Next thing I am getting a
call that it would not work….<o:p></o:p></span></font></div>
<div class="MsoNormal" style="font-size:12pt;"><font
color="#1f497d" face="Calibri" size="4"><span
style="font-size:14.0pt;font-family:"Calibri","sans-serif";color:#1F497D">I
doubt that sawdust would be any different.<o:p></o:p></span></font></div>
<div class="MsoNormal" style="font-size:12pt;"><font
color="#1f497d" face="Calibri" size="4"><span
style="font-size:14.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></font></div>
<div class="MsoNormal" style="font-size:12pt;"><font
color="#1f497d" face="Calibri" size="4"><span
style="font-size:14.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Later,<o:p></o:p></span></font></div>
<div class="MsoNormal" style="font-size:12pt;"><font
color="#1f497d" face="Calibri" size="4"><span
style="font-size:14.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Bob
Ellison<o:p></o:p></span></font></div>
<div class="MsoNormal" style="font-size:12pt;"><font
color="#1f497d" face="Calibri" size="4"><span
style="font-size:14.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></font></div>
<div>
<div style="border:none;border-top:solid #B5C4DF
1.0pt;padding:3.0pt 0in 0in 0in">
<div class="MsoNormal" style="font-size:12pt;"><b><font
face="Tahoma" size="2"><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";font-weight:bold">From:</span></font></b><font
face="Tahoma" size="2"><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">
<a moz-do-not-send="true"
href="mailto:re-wrenches-bounces@lists.re-wrenches.org">re-wrenches-bounces@lists.re-wrenches.org</a>
[<a moz-do-not-send="true"
href="mailto:re-wrenches-bounces@lists.re-wrenches.org">mailto:re-wrenches-bounces@lists.re-wrenches.org</a>]
<b><span style="font-weight:bold">On Behalf Of </span></b>jay
peltz<br>
<b><span style="font-weight:bold">Sent:</span></b>
Saturday, October 13, 2012 5:28 PM<br>
<b><span style="font-weight:bold">To:</span></b>
RE-wrenches<br>
<b><span style="font-weight:bold">Subject:</span></b>
Re: [RE-wrenches] Off-grid 1nverter replacement
for 3 HP<o:p></o:p></span></font></div>
</div>
</div>
<div class="MsoNormal" style="font-size:12pt;"><font
face="Times New Roman" size="3"><span
style="font-size:12.0pt"><o:p> </o:p></span></font></div>
<div class="MsoNormal" style="font-size:12pt;"><font
face="Times New Roman" size="3"><span
style="font-size:12.0pt">HI Hilton,<o:p></o:p></span></font></div>
<div>
<div class="MsoNormal" style="font-size:12pt;"><font
face="Times New Roman" size="3"><span
style="font-size:12.0pt"><o:p> </o:p></span></font></div>
</div>
<div>
<div class="MsoNormal" style="font-size:12pt;"><font
face="Times New Roman" size="3"><span
style="font-size:12.0pt">Before you go anywhere
you need to know what the draw on this motor is.<o:p></o:p></span></font></div>
</div>
<div>
<div class="MsoNormal" style="font-size:12pt;"><font
face="Times New Roman" size="3"><span
style="font-size:12.0pt"><o:p> </o:p></span></font></div>
</div>
<div>
<div class="MsoNormal" style="font-size:12pt;"><font
face="Times New Roman" size="3"><span
style="font-size:12.0pt">I've seen 3 hp motors not
be able to start on a 15kw genny.<o:p></o:p></span></font></div>
</div>
<div>
<div class="MsoNormal" style="font-size:12pt;"><font
face="Times New Roman" size="3"><span
style="font-size:12.0pt">Why? Just horrible
motors thats all.<o:p></o:p></span></font></div>
</div>
<div>
<div class="MsoNormal" style="font-size:12pt;"><font
face="Times New Roman" size="3"><span
style="font-size:12.0pt"><o:p> </o:p></span></font></div>
</div>
<div>
<div class="MsoNormal" style="font-size:12pt;"><font
face="Times New Roman" size="3"><span
style="font-size:12.0pt">jay<o:p></o:p></span></font></div>
</div>
<div>
<div class="MsoNormal" style="font-size:12pt;"><font
face="Times New Roman" size="3"><span
style="font-size:12.0pt"><o:p> </o:p></span></font></div>
</div>
<div>
<div class="MsoNormal" style="font-size:12pt;"><font
face="Times New Roman" size="3"><span
style="font-size:12.0pt">peltz power<o:p></o:p></span></font></div>
<div>
<div>
<div class="MsoNormal" style="font-size:12pt;"><font
face="Times New Roman" size="3"><span
style="font-size:12.0pt">On Oct 13, 2012, at
11:16 AM, Hilton Dier III wrote:<o:p></o:p></span></font></div>
</div>
<div class="MsoNormal" style="font-size:12pt;"><font
face="Times New Roman" size="3"><span
style="font-size:12.0pt"><br>
<br>
<o:p></o:p></span></font></div>
<div>
<div class="MsoNormal" style="font-size:12pt;"><font
face="Times New Roman" size="3"><span
style="font-size:12.0pt">I have an off-grid
client who is having trouble with his aging
Xantrex SW4024 inverter and is considering an
upgrade. I need some advice.<br>
<br>
One of his problems with his present system is
that he can't run his 3 HP 240VAC table saw on
the 4024. He'd be content to run his generator
for any long sessions of sawing, but he'd like
the capability to do a cut or two without
firing it up.<br>
<br>
I was thinking about stacking a couple of
Outbacks. I'd like to know people's real-world
experiences with the relationship between
motor HP, rated inverter watts, and surge
watts. How much wattage does he need to
actually do the job? That is, without flailing
the inverter(s) into a shortened life span.<br>
<br>
Also, how do Outbacks compare with Magnums or
whatever? I have been using Outbacks for a
while with good results, but I have been
hearing murmurs and grumbling since they were
bought out. I haven't used Xantrex/Schneider
for a while and I have no experience with
Magnums. I notice that the Magnums offer split
phase 240. <br>
<br>
I should note that he has his inverter setup
in his wood shop. I am theorizing that some of
his inverter trouble could be from a tree's
worth of sawdust in the case. He presently has
a 24V system, but he is considering a battery
replacement, which would be an opportunity to
switch to 48V if necessary. The sawdust issue
makes me lean towards the sealed Outbacks, but
he does have a partially finished box for the
inverter with filters and a fan.<br>
<br>
Opinions?<br>
<br>
Many thanks.<br>
<br>
Hilton<br>
<br>
<o:p></o:p></span></font></div>
<divre><font face="Courier New" size="2"><span
style="font-size:10.0pt">-- <o:p></o:p></span></font>
<pre><font face="Courier New" size="2"><span style="font-size:10.0pt">Hilton Dier III<o:p></o:p></span></font></pre>
<pre><font face="Courier New" size="2"><span style="font-size:10.0pt">Renewable Energy Design<o:p></o:p></span></font></pre>
<pre><font face="Courier New" size="2"><span style="font-size:10.0pt">Partner, Solar Gain LLC<o:p></o:p></span></font></pre>
<pre><font face="Courier New" size="2"><span style="font-size:10.0pt">453 East Hill Rd.<o:p></o:p></span></font></pre>
<pre><font face="Courier New" size="2"><span style="font-size:10.0pt">Middlesex, VT 05602<o:p></o:p></span></font></pre>
<pre><font face="Courier New" size="2"><span style="font-size:10.0pt">Tel: 802-223-6652<o:p></o:p></span></font></pre>
</divre></div>
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