<div dir="ltr"><div class="gmail_default">William,<br><br>The Radian was designed to be big enough so that one inverter could handle most residential applications, but also easy to parallel so that very large systems could be assembled by simply repeating the same building blocks, similar to how installers build up 100kW PV systems using string inverters. However, when you have systems of this size the potential available fault currents become such that we wanted to move away from using ganged breakers and metal sliding plates, especially when double-pole, double-throw safety switches in a range of sizes, both automatic and manual, are commonly available from many sources. <br>
<br>With larger systems, the easiest way to meet 705.12 is to install a dedicated “Inverter Combiner” AC load center fed by a supply side tap, similar to what is typically done with larger grid-dependent PV systems. It just seems far more cost effective to use standard, off-the-shelf components which are probably on your truck already, rather than custom sheet metal sized for every possible inverter combination. You could use a service-rated 6-12 panel for up to three Radian inverters, or 8-16 for four, etc. Repeat an identical size panel on the output to gather the inverter outputs, then send the combined feed to the house protected load center. If you have a generator as a second AC source, then pick up a third panel of the same size. </div>
<div class="gmail_default"><br></div><div class="gmail_default">While we designed the prewired GSLC enclosures to provide a simple, quick solution for single inverter systems, we also offer the bare GSLC for multiple inverter systems as well as to allow full customization. Each GSLC has space for 18 AC or DC panel mount breakers. In a dual inverter system like the one you're planning, we’ve seen some cool installations where one GSLC has been assigned to AC, and one to PV. It works out pretty slick. Each GSLC comes with its own shunt, so systems with up to three Radians can easily use the multi-channel FLEXnet DC system monitor to give a full SOC picture for all inputs and outputs.<br>
<br></div><div class="gmail_default">Each Radian inverter should have its own GSLC, and pick up two 175A breakers per inverter. If the Inverter Combiner boxes are a distance from the inverter stack or out of visual range, then you will need to install 50A AC breakers for the appropriate inputs and outputs. Me personally, I’d install these breakers at the inverter in all systems, as it gives a positive disconnect directly related to the inverter directly above – good peace of mind for anyone who comes later. There should be a finger’s width of space between every pair of inverters, to allow clearance for the door swing. <br>
<br></div><div class="gmail_default">Always update the firmware, as we’re constantly expanding the capabilities and features. You don’t need a computer or internet connection on the site if you download the latest firmware for both the inverter and the MATE3, unzip it and copy to an SD card before going out into the field. Update the MATE3 first. <br>
<br>I hope this helps, and thanks everyone for the good feedback.<br><br><br></div><div class="gmail_default">Philip Undercuffler<br>Director, Product Management and Strategy<br>OutBack Power Technologies<br>17825 59th Ave NE, Suite B, Arlington, WA 98223<br>
360.618.4306 office | 425.319.2821 mobile<br><a href="http://www.outbackpower.com">www.outbackpower.com</a><br><p class="" style="font-family:arial,helvetica,sans-serif;font-size:small"><span style="font-size:10pt;font-family:Arial,sans-serif"> </span></p>
</div><div class="gmail_extra"><br><br><div class="gmail_quote">On Mon, Aug 5, 2013 at 5:14 PM, Allan Sindelar <span dir="ltr"><<a href="mailto:allan@positiveenergysolar.com" target="_blank">allan@positiveenergysolar.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div text="#000000" bgcolor="#FFFFFF">
Wrenches,<br>
Robin at Midnite read my post to William and added the following off
list:<br>
<div><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><br>
Allan, thanks for adding us into the Wrenches discussion. We do
have E-Panels set up for single as well as dual Radians. I do
not think OutBack does? We have a Master/Slave set up where the
Master has the AC bypass set up for two inverters. OutBack makes
you buy an additional outboard transfer switch. We also have the
large battery combiner made for connecting either two Radians or
four SMA Sunny Islands. OutBack does not have this.<u></u><u></u></span>
<div>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">We
also have a 2 piece back plate that holds all of this stuff.
OutBack doesn’t.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">The
installers I have worked with prefer the MidNite E-Panel
over the OutBack since you can actually get to the breakers
on the MidNite. It is a bit less expensive also.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u>Thanks,
Robin<u></u><u></u></span></p>
<p class="MsoNormal"><font face="Times New Roman, Times, serif"><span style="font-size:11pt"><u></u>I would also suggest a
couple of other things... with four Radians, you need to
be able to handle 1,400 amps of DC current (each Radian
uses 2 2/0 cables per pole and two 175A breakers). Robin
has worked with us to develop an 850 A DC disconnect
system (four SI5048 with 125A DC breakers and one Radian
at 350 A), and may be able to assist with this greater
need.<br>
<u></u></span></font></p>
<p class="MsoNormal"><font face="Times New Roman, Times, serif"><span style="font-size:11pt"><u></u>Also, you mention a 200A DC
recombiner - I assume you are aware of the 60/80A
limitation per controller, and that they can't be
paralleled on the input side.No reply needed.<br>
Allan<u></u></span></font><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext"></span></b><br>
<br>
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<p class="MsoNormal">Re: [RE-wrenches] Dual Radian
install<u></u><u></u></p>
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<p class="MsoNormal" style="text-align:right" align="right"><b>Date: <u></u><u></u></b></p>
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<p class="MsoNormal">Mon, 05 Aug 2013 14:14:47 -0600<u></u><u></u></p>
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<p class="MsoNormal" style="text-align:right" align="right"><b>From: <u></u><u></u></b></p>
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<td style="padding:0in 0in 0in 0in">
<p class="MsoNormal">Allan Sindelar <a href="mailto:allan@positiveenergysolar.com" target="_blank"><allan@positiveenergysolar.com></a><u></u><u></u></p>
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<p class="MsoNormal" style="text-align:right" align="right"><b>Reply-To: <u></u><u></u></b></p>
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<p class="MsoNormal"><a href="mailto:Allan@positiveenergysolar.com" target="_blank">Allan@positiveenergysolar.com</a>,
RE-wrenches <a href="mailto:re-wrenches@lists.re-wrenches.org" target="_blank"><re-wrenches@lists.re-wrenches.org></a><u></u><u></u></p>
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<p class="MsoNormal">RE-wrenches <a href="mailto:re-wrenches@lists.re-wrenches.org" target="_blank"><re-wrenches@lists.re-wrenches.org></a><u></u><u></u></p>
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<div><div class="im">
<p class="MsoNormal" style="margin-bottom:12.0pt">William,<br>
We have done three or four single-inverter Radian systems,
always with an E-Panel, rather than the GSLC. We like the
E-Panel, but can't compare them directly. You might want
to compare the two products in your designs.<br>
Allan<u></u><u></u></p>
</div><div>
<p class="MsoNormal"><b>Allan Sindelar</b><br>
<span style="font-size:10.0pt"><a href="mailto:Allan@positiveenergysolar.com" target="_blank"><u><span style="color:#000099">Allan@positiveenergysolar.com</span></u></a></span><br>
<span style="font-size:10.0pt"></span></p><div class="im">NABCEP Certified PV
Installation Professional <br></div><div class="im">
NABCEP Certified Technical Sales Professional<br>
New Mexico EE98J Journeyman Electrician<br>
Founder and Chief Technology Officer<br>
<b>Positive Energy, Inc.</b>, a Certified B
Corporation</div><sup><span style="font-size:7.5pt">TM</span></sup><div class="im"><span style="font-size:10.0pt"><br>
3209 Richards Lane<br>
Santa Fe, New Mexico 87507<br>
<b><a href="tel:505%20424-1112" value="+15054241112" target="_blank">505 424-1112</a> office 780-2738 cell</b><br>
<a href="http://www.positiveenergysolar.com/" target="_blank"><u>www.positiveenergysolar.com</u></a></span><u></u><u></u></div><p></p>
<p class="MsoNormal"><span style="font-size:10.0pt"> </span><u></u><u></u></p>
</div><div class="im">
<p class="MsoNormal">On 8/5/2013 1:50 PM, William Miller
wrote:<u></u><u></u></p>
</div></div>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt"><div class="im">
<div>
<p class="MsoNormal"><span style="font-family:"Arial","sans-serif"">Friends:</span><u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"><span style="font-family:"Arial","sans-serif"">I
am bidding installation of two Radian inverters.
Anyone out there done this yet? Got any advice?</span><u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"><span style="font-family:"Arial","sans-serif"">Thanks
in advance,</span><u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"><span style="font-family:"Arial","sans-serif"">William
Miller</span><u></u><u></u></p>
</div>
</div><div>
<p class="MsoNormal"> <img src="cid:part7.05090203.08020202@positiveenergysolar.com" width="145" border="0" height="43"><u></u><u></u></p>
</div><div class="im">
<p class="MsoNormal"><span style="font-family:"Arial","sans-serif"">17395
Oak Rd. Atascadero, CA 93422</span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-family:"Arial","sans-serif""><a href="http://www.millersolar.com/" target="_blank"><u>www.millersolar.com</u></a></span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-family:"Arial","sans-serif""><a href="tel:805-438-5600" value="+18054385600" target="_blank">805-438-5600</a>
voice*</span><u></u><u></u></p>
<p class="MsoNormal"><span style="font-family:"Arial","sans-serif"">*Note:
above number replaces cell number</span><u></u><u></u></p>
<div>
<p class="MsoNormal"> <br>
</p>
</div>
</div></blockquote>
</div>
</div>
</div>
</div>
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