<div dir="ltr">Given the DC voltage sag I have to wonder how a bank of lithium batteries would react as if I understand correctly they maintain the same voltage through out their entire range of SOC.<div><br></div><div>Christopher</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, Jul 26, 2019 at 1:19 PM Ray <<a href="mailto:ray@solarray.com">ray@solarray.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div bgcolor="#FFFFFF">
<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="gmail-m_-5310762092621794174moz-signature" cols="72">Ray Walters
Remote Solar
303 505-8760</pre>
<div class="gmail-m_-5310762092621794174moz-cite-prefix">On 7/26/19 7:32 AM, Jeff Clearwater
wrote:<br>
</div>
<blockquote type="cite">
<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">
<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="gmail-m_-5310762092621794174moz-signature" cols="72">Ray Walters
Remote Solar
303 505-8760</pre>
<div class="gmail-m_-5310762092621794174moz-cite-prefix">On 7/25/19 5:15 PM, Jeff Clearwater
wrote:<br>
</div>
<blockquote type="cite">
<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">
<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">
<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">http://members.sti.net/offgridsolar/</a>
e-mail <a href="mailto:offgridsolar@sti.net" target="_blank">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="gmail-m_-5310762092621794174moz-txt-link-rfc2396E" href="mailto:jeffc@villagepowerdesign.com" target="_blank"><jeffc@villagepowerdesign.com></a>
wrote:</p>
<blockquote type="cite" style="padding-left:5px;border-left:2px solid rgb(16,16,255);margin-left:5px;width:100%">
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="gmail-m_-5310762092621794174__postbox-detected-content gmail-m_-5310762092621794174__postbox-detected-date" style="display:inline;font-size:inherit;padding:0px">- <span class="gmail-m_-5310762092621794174__postbox-detected-content gmail-m_-5310762092621794174__postbox-detected-date" style="display:inline;font-size:inherit;padding:0px"><span class="gmail-m_-5310762092621794174__postbox-detected-content gmail-m_-5310762092621794174__postbox-detected-date" style="display:inline;font-size:inherit;padding:0px">15</span>.2</span></span>
Amps 3700 Watts<br>
<span class="gmail-m_-5310762092621794174__postbox-detected-content gmail-m_-5310762092621794174__postbox-detected-date" style="display:inline;font-size:inherit;padding:0px;color:rgb(0,0,0)">30
Minutes - 18.3</span> Amps 4400 Watts<br>
<span class="gmail-m_-5310762092621794174__postbox-detected-content gmail-m_-5310762092621794174__postbox-detected-date" style="display:inline;font-size:inherit;padding:0px">5 Secs</span> -
29.2 Amps 7000 Watts<br>
<span class="gmail-m_-5310762092621794174__postbox-detected-content gmail-m_-5310762092621794174__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">http://members.sti.net/offgridsolar/</a>
e-mail <a href="mailto:offgridsolar@sti.net" target="_blank">offgridsolar@sti.net</a>
text 209 813 0060</span></strong></pre>
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</blockquote></div><br clear="all"><div><br></div>-- <br><div dir="ltr" class="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div dir="ltr"><div dir="ltr"><p style="text-align:center"><span style="font-size:10pt;color:rgb(31,73,125)"><font face="Arial, sans-serif">Chris Schaefer\u2019s<br></font></span><a href="http:www.solarandwindfx.com" style="font-size:12.8px" target="_blank"><img src="http://www.solarandwindfx.com/wp-content/uploads/2015/01/Solar-Wind-FX-Logo.png" width="200" height="40" style="color: rgb(31, 73, 125); font-family: Arial, sans-serif; font-size: 10pt;"></a><br><i><span style="font-family:Arial,sans-serif;color:rgb(31,73,125)"><span style="font-size:9pt">Tel/Fax
585-229-2083 or Cell 585-748-1870 </span><span style="font-size:12px"><br></span></span></i><i style="font-size:12.8px"><span style="font-size:10pt"><font color="#1f497d"><font face="Arial, sans-serif">5115
South Hill Road ~ Canandaigua New York 14424<br></font></font></span></i><i style="font-size:12.8px"><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(31,73,125)"><a href="http://www.solarandwindfx.com" target="_blank"><span style="color:blue">www.solarandwindfx.com</span></a> ~ E-mail: <span style="color:blue"><a href="mailto:chris@solarandwindfx.com" target="_blank">chris@solarandwindfx.com</a></span></span></i></p><p style="text-align:center"><i><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(31,73,125)"><img src="http://solarandwindfx.com/wp-content/uploads/2015/01/certs.jpg" width="200" height="56"><br></span></i></p>
<p style="text-align:center"><span style="font-size:10pt;font-family:Arial,sans-serif;color:black">Thomas Jefferson,
the author of our great Constitution, once said, "democracy" will
cease to exist when you take away from those who are willing to work and give
to those who would not."</span><span style="font-size:10pt;font-family:Arial,sans-serif;color:rgb(31,73,125)"></span></p></div></div></div></div></div></div>