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<p>I've run a 3 Hp pump on a pair of VFX 3648s, but then the 2nd
issue was DC voltage sag from the batteries. We had a string of
Rolls 5000s that could not keep the voltage high enough below 70%
SOC. Be sure to have plenty of battery behind this system. Also
you might look into the soft start controllers, I've used some
from Franklin that were a cheaper option than a bigger inverter.<br>
</p>
<pre class="moz-signature" cols="72">Ray Walters
Remote Solar
303 505-8760</pre>
<div class="moz-cite-prefix">On 7/26/19 7:32 AM, Jeff Clearwater
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:901272ea-1752-e1eb-d6bd-a968f5d1bfd7@villagepowerdesign.com">
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<span><span style="font-weight: bold;">Thanks Ray and Jerry</span><span
style="font-weight: bold;">,</span><span style="font-weight:
bold;"><br>
</span><span style="font-weight: bold;"><br>
</span><span style="font-weight: bold;">Great to hear from you
both with your years of combined experi</span><span
style="font-weight: bold;">ence :)</span><br>
<br>
<span style="font-weight: bold;">So yes looking at the 5 sec has
me switching back to a trusty Radian - <span
style="text-decoration: underline;">even then from what you
are say</span></span><span style="text-decoration:
underline;"><span style="font-weight: bold;">ing it may not
work.</span></span><br>
<br>
And you are right Ray - Outback is careful to rate the
"overload capability" in KVA rather than KW due most likely to
voltage sag of course.<br>
<br>
<span style="font-weight: bold;">So this 53 LRA 2 HP motor - if
I can only trust the 5 second (50 A) might not start -
especially with other loads on the system?</span><br>
<br>
<span style="font-weight: bold;">RAD</span><span
style="font-weight: bold;">IA</span><span style="font-weight:
bold;">N SURGE RATINGS:</span><br>
<br>
<span style="font-weight: bold;">Maximum Output Current</span> <br>
1 ms peak 100 Amps AC at 240 VAC, 200 Amps AC at 120 VAC<br>
100 ms RMS 70.7 Amps AC at 240 VAC<br>
<br>
<span style="font-weight: bold;">Overload Capability</span><br>
100 ms surge 16.97 kVa<br>
5 seconds 12 kVa<br>
30 minute 9 kVa<br>
<br>
<span style="font-weight: bold;">Other's </span><span
style="font-weight: bold;">experience with 2 HP sewage pump or
well pump motors on a Radian?</span><span style="font-weight:
bold;"><br>
</span><span style="font-weight: bold;"><br>
</span><span style="font-weight: bold;">Thanks!</span><span
style="font-weight: bold;"><br>
</span><span style="font-weight: bold;"><br>
</span><span style="font-weight: bold;">Jeff</span><br>
<br>
<br>
Ray wrote on 7/25/19 5:48 PM:</span><br>
<br>
<blockquote type="cite"
cite="mid:43f52ddf-b3f2-87b6-df21-b7bc31fec861@solarray.com">
<meta http-equiv="Content-Type" content="text/html;
charset=UTF-8">
<p>I only look at the 5 sec and 30 sec surge ratings to get an
idea what an inverter can really do in the real world. All
those millisecond ratings/ in rush current specs won't get a
pump or motor started, and will basically just get you into
trouble. The reason they have those ratings in amps and not
watts, is that the voltage craters during that 100mS surge.<br>
</p>
<p>I can't tell you how many times we tried to start a pump,
compressor, or large table saw, and the inverter just shut
off, even though the "in rush current" was within the
theoretical inverter capacity. Actual Wrench list
testimonials are much more valuable than those arcane specs.<br>
</p>
<pre class="moz-signature" cols="72">Ray Walters
Remote Solar
303 505-8760</pre>
<div class="moz-cite-prefix">On 7/25/19 5:15 PM, Jeff Clearwater
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:f4056caf-f4ac-2883-1289-f8012fbdb9e0@villagepowerdesign.com">
<meta http-equiv="Content-Type" content="text/html;
charset=UTF-8">
<span><span style="font-weight: bold;">Hey There Wrenches,</span><br>
<br>
So be advised that after a little research the SW dual stack
will NOT double the surge ratings of a single SW.<br>
<br>
But that brings me to my second question:<br>
<span style="font-weight: bold;"><br>
</span><span style="font-weight: bold;">What inverter surge
rating should one refer to when looking at maximum Inrush
or LRA - 1ms? 100ms? 1 se</span><span
style="font-weight: bold;">c?</span><br>
<br>
<span style="font-weight: bold;">Your</span><span
style="font-weight: bold;"> engineering wisdom welcomed!</span><br>
<br>
Thanks,<br>
<br>
Jeff<br>
<br>
<br>
<br>
Jeff Clearwater wrote on 7/23/19 8:27 PM:</span><br>
<br>
<blockquote type="cite"
cite="mid:98e033f1-d95b-e47c-57f1-64c6696a9309@villagepowerdesign.com">
<meta http-equiv="Content-Type" content="text/html;
charset=UTF-8">
<span>Thanks for the tip! I'll check the firmware.<br>
<br>
Dave Angelini Offgrid Solar wrote on 7/22/19 9:11 AM:</span><br>
<br>
<blockquote type="cite"
cite="mid:405087905f6db64e06e6d67beb2675d1@127.0.0.1">
<meta http-equiv="content-type" content="text/html;
charset=UTF-8">
<p>Hi Jeff,</p>
<p> </p>
<p>I am not going to guess if this will work, it should.
I use XW's because they start anything I have come
across.</p>
<p>If you do this, make sure but SW's have the latest and
same firmware. There were problems with stacked SW's
early on in their development.</p>
<pre><strong><span>Dave Angelini Offgrid Solar
"we go where powerlines don't"
<a href="http://members.sti.net/offgridsolar/" target="_blank" moz-do-not-send="true">http://members.sti.net/offgridsolar/</a>
e-mail <a href="mailto:offgridsolar@sti.net" moz-do-not-send="true">offgridsolar@sti.net</a>
text 209 813 0060</span></strong></pre>
<p>On Mon, 22 Jul 2019 07:26:07 -0700, Jeff Clearwater <a
class="moz-txt-link-rfc2396E"
href="mailto:jeffc@villagepowerdesign.com"
moz-do-not-send="true"><jeffc@villagepowerdesign.com></a>
wrote:</p>
<blockquote type="cite" style="padding-left:5px;
border-left:#1010ff 2px solid; margin-left:5px;
width:100%"><!-- html ignored --><!-- head ignored -->
<!-- meta ignored -->Hey Esteemed Wrenches,<br>
<br>
So I recently built a power trailer with a single 4 KW
(4048) Schneider SW for a client with a moderate cabin
lifestyle.<br>
<br>
But he lives on a high hill and even though his 2 HP
Macerator is only rated at 15 amps continuous that baby
starts up with a whopping kick - probably close to or at
it's 53 Amps Locked Rotor rating.<br>
<br>
<span style="font-weight: bold;">The SW has the
following surge capability:</span><br>
<br>
<span><span style="font-weight: bold;">SW 4048 Rated</span><span
style="font-weight: bold;"> @ 240 Volts:</span><br>
Continuous <span class="__postbox-detected-content
__postbox-detected-date" style="display: inline;
font-size: inherit; padding: 0px;">- <span
class="__postbox-detected-content
__postbox-detected-date" style="display: inline;
font-size: inherit; padding: 0px;"><span
class="__postbox-detected-content
__postbox-detected-date" style="display: inline;
font-size: inherit; padding: 0px;">15</span>.2</span></span>
Amps 3700 Watts<br>
<span class="__postbox-detected-content
__postbox-detected-date" style="display: inline;
font-size: inherit; padding: 0px; color: #000000;">30
Minutes - 18.3</span> Amps 4400 Watts<br>
<span class="__postbox-detected-content
__postbox-detected-date" style="display: inline;
font-size: inherit; padding: 0px;">5 Secs</span> -
29.2 Amps 7000 Watts<br>
<span class="__postbox-detected-content
__postbox-detected-date" style="display: inline;
font-size: inherit; padding: 0px;">Max (100ms?) - 41</span>
Amps - 9840 Watts<br>
<br>
Can I be confidant that 2 stacked SWs will start this
baby?<br>
<br>
<span style="font-weight: bold;">Any experience with
similar macerators - or simply educated guesses</span><span
style="font-weight: bold;">?</span><span
style="font-weight: bold;"><br>
</span><br>
Thanks!<br>
<br>
Jeff<br>
<br>
</span></blockquote>
<div>-- <br>
<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" moz-do-not-send="true">http://members.sti.net/offgridsolar/</a>
e-mail <a href="mailto:offgridsolar@sti.net" moz-do-not-send="true">offgridsolar@sti.net</a>
text 209 813 0060</span></strong></pre>
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