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It looks like way too much power to AC couple with a 4KW Radian. Be sure
to talk to an Outback engineer in great detail before using the
GSLC175AC-120/240. <br><br>
<br>
At 10:54 PM 10/17/2016, you wrote:<br>
<blockquote type=cite class=cite cite="">Esteemed Wrenches:<br>
<br>
Anyone have experience setting up AC coupling with SolarEdge and the
Outback Radian?<br><br>
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;Â #2 = 15.<br><br>
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><br>
I am considering using the Outback Radian GS4048A inverter in conjunction
with the GSLC175-AC-120/240 AC-Coupling Center.<br><br>
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><br>
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><br>
Any help or guidance will be greatly appreciated.<br><br>
Regards,<br><br>
Gary Willett<br>
Icarus Engineering / Solar Services LLC<br><br>
<u>References</u>:<br>
<dl>
<dd>(1) Outback Application Note "AC Coupling OutBack Power Radian
Inverters with SolarEdge N. American Inverters</i>"</u><br>
<dd>
<a 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><br>
<dd>(2) Outback Application Note "Adding the battery back-up power
option to existing grid-tied PV/solar systems</i>"</u><br>
<dd>
<a 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><br>
<dd>(3) SolarEdge Application Note "SolarEdge Inverters, Power
Control Options"</u></i><br>
<dd>
<a 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><br>
</dl>REF (2); Page 9 of 14</u> - Outback's AC Coupling Guideline Number
Two: <br>
<dl>
<dd>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><br>
<dd>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><br>
</dl>REF (3); Page 4 of 5 - SolarEdge/OutBack Radian Wiring
Diagram</u>:<br>
<dl>
<dd>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><br>
<dd>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><br>
</dl>REF (1); Page 3 of 5 - SolarEdge Setup / Programming</u>:<br>
<dl>
<dd>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><br>
<dl>
<dd>"DEFAULT" SolarEdge Programming</u><br>
<dd>0000 <100,1,00,Y> ----meaning = 100% power, 1.00 power factor,
point is active<br>
<dd>0001 <0,1.00,Y> ----meaning = 0% power, 1.00 power factor,
point is active<br><br>
</dl>
<dd>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>
<dl>
<dd>(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><br>
<dd>(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%.<br><br>
<dd>"PROPOSED" SolarEdge Programming</u><br>
<dd>0000 <100,1,00,Y> ----meaning = 100% power, 1.00 power factor,
point is active<br>
<dd>0001 <0,1.00,Y> ----meaning = 0% power, 1.00 power factor,
point is active<br>
<dd>0010 <30,1.00,Y> ----meaning = 30% power, 1.00 power factor,
point is active<br>
<dd>0011 <0,1.00,Y> ----meaning = 0% power, 1.00 power factor,
point is active<br><br>
</dl>
<dd>Is this doable?<br><br>
</dl><br>
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