<html><head><meta http-equiv="Content-Type" content="text/html charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">How many kWh are you shooting for?<div class=""><br class=""></div><div class=""> <br class=""><div><blockquote type="cite" class=""><div class="">On Oct 17, 2016, at 9:54 PM, Gary Willett <<a href="mailto:Gary@icarussolarservices.com" class="">Gary@IcarusSolarServices.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class="">
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Esteemed Wrenches:<br class="">
<br class="">
Anyone have experience setting up AC coupling with SolarEdge and the
Outback Radian?<br class="">
<br class="">
I have a client with a SolarEdge SE10000A-US inverter, equipped with
31 SunPower X21-345 modules (10.7kWp) and associated SolarEdge P400
DC optimizers. The DC optimizers are arranged into two strings of
series connected optimizers: #1 = 16; #2 = 15.<br class="">
<br class="">
The client wants to add a limited battery backup solution, and a 4kW
inverter will serve the needs of the requisite protected loads
panel.<br class="">
<br class="">
I am considering using the Outback Radian GS4048A inverter in
conjunction with the GSLC175-AC-120/240 AC-Coupling Center.<br class="">
<br class="">
I want to make a slight change to the PRI programming on the
SolarEdge inverter, and add another relay contact to the Radian, to
accommodate a 4kW Outback inverter AC coupled to a 10kW SolarEdge
inverter.<br class="">
<br class="">
This is my first AC coupling project with these systems. The
analysis below is based solely on review of available documents on
the Outback and SolarEdge web sites. <br class="">
<br class="">
Any help or guidance will be greatly appreciated.<br class="">
<br class="">
Regards,<br class="">
<br class="">
Gary Willett<br class="">
Icarus Engineering / Solar Services LLC<br class="">
<br class="">
<u class="">References</u>:<br class="">
<blockquote class="">(1) <u class="">Outback Application Note "</u><u class=""><i class="">AC Coupling
OutBack Power Radian Inverters with SolarEdge N. American
Inverters</i></u><u class="">"</u><br class="">
<a class="moz-txt-link-freetext" href="http://www.outbackpower.com/downloads/documents/technotes/ac_coupling_tech_note.pdf">http://www.outbackpower.com/downloads/documents/technotes/ac_coupling_tech_note.pdf</a><br class="">
<br class="">
(2) <u class="">Outback Application Note "</u><u class=""><i class="">Adding the battery
back-up power option to existing grid-tied PV/solar systems</i>"</u><br class="">
<a class="moz-txt-link-freetext" href="http://www.outbackpower.com/downloads/documents/flexcoupled/app_note_acc_new.pdf">http://www.outbackpower.com/downloads/documents/flexcoupled/app_note_acc_new.pdf</a><br class="">
<br class="">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" class="">
<title class=""></title>
(3) <u class="">SolarEdge Application Note </u><i class=""><u class="">"SolarEdge
Inverters, Power Control Options"</u></i><br class="">
<a class="moz-txt-link-freetext" href="http://www.solaredge.com/sites/default/files/application_note_power_control_configuration.pdf">http://www.solaredge.com/sites/default/files/application_note_power_control_configuration.pdf</a><br class="">
</blockquote>
<u class=""><u class="">REF (2); Page 9 of 14</u> - Outback's AC Coupling Guideline
Number Two</u>: <br class="">
<blockquote class="">The OutBack inverter power rating should be 1.25% of the
GT inverter power rating. This guideline ensures that the GT
inverter does not overwhelm the charging circuitry in the OutBack
inverter if the load demand goes to zero and all available GT
inverter power is flowing to the OutBack inverter.<br class="">
<br class="">
With the 4kW GS4048A inverter, the PV power rating is therefore
limited to 3.2kW. This is 30% of the nameplate rating of the PV
array (3.2/10.7).<br class="">
</blockquote>
<u class="">REF (3); Page 4 of 5</u><u class=""> - </u><u class="">SolarEdge/OutBack Radian
Wiring Diagram</u>:<br class="">
<blockquote class="">On the male connector that fits into the PRI connector
on the SolarEdge PCB, two wires are connected from the OutBack
GSLC load center 12V relay (OBR-16-DIN). <br class="">
</blockquote>
<blockquote class=""> When activated, a normally open contact (NO) of the
Outback OBR-16-DIN 12V relay supplies +5V from "pin 8" to "pin 6"
of the SolarEdge inverter's "Power Reduction Interface (PRI)
port". <br class="">
</blockquote>
<u class="">REF (1); Page 3 of 5</u><u class=""> - </u><u class="">SolarEdge Setup /
Programming</u>:<br class="">
<blockquote class="">Per the App Note, when the Radian wants to shut down the
SolarEdge, the OBR-16-DIN 12V relay is activated and a "1" is
applied to bit 1 of the PRI. This takes the SolarEdge output
power, in a gradual manner, from 100% to 0%.<br class="">
</blockquote>
<blockquote class="">
<blockquote class=""><u class="">"DEFAULT" SolarEdge Programming</u><br class="">
0000 <100,1,00,Y> ----meaning = 100% power, 1.00 power
factor, point is active<br class="">
0001 <0,1.00,Y> ----meaning = 0% power, 1.00 power factor,
point is active<br class="">
</blockquote>
For my project, when the grid is down, the SolarEdge inverter must
be limited to 30% power. I want to use the second NO/NC contact on
the OBR-16-DIN 12V relay to accomplish this. Not yet sure exactly
how to accomplish this in the Radian programming, but here's how I
want it to function:<br class="">
<blockquote class="">(a) when the grid is down, the second OBR contact,
connected to bit 2 of the PRI, is activated and a "1" is applied
to bit 2. This takes the SolarEdge output power, in a gradual
manner, from 100% to 30%.<br class="">
<br class="">
(b) when the Radian wants to shut down the SolarEdge, a "1" is
applied to bit 1. This takes the SolarEdge output power, in a
gradual manner, from 30% to 0%.</blockquote>
<blockquote class=""><u class="">"PROPOSED" SolarEdge Programming</u><br class="">
0000 <100,1,00,Y> ----meaning = 100% power, 1.00 power
factor, point is active<br class="">
0001 <0,1.00,Y> ----meaning = 0% power, 1.00 power factor,
point is active<br class="">
0010 <30,1.00,Y> ----meaning = 30% power, 1.00 power
factor, point is active<br class="">
0011 <0,1.00,Y> ----meaning = 0% power, 1.00 power factor,
point is active<br class="">
</blockquote>
Is this doable?<br class="">
<br class="">
</blockquote>
<br class="">
</div>
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