[RE-wrenches] AC Coupling Solar Edge SE10000A-US With Outback Radian GS4048A

[Drake]

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.


At 10:54 PM 10/17/2016, you wrote:
>Esteemed Wrenches:
>
>Anyone have experience setting up AC coupling 
>with SolarEdge and the Outback Radian?
>
>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.
>
>The client wants to add a limited battery backup 
>solution, and a 4kW inverter will serve the 
>needs of the requisite protected loads panel.
>
>I am considering using the Outback Radian 
>GS4048A inverter in conjunction with the GSLC175-AC-120/240 AC-Coupling Center.
>
>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.
>
>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.
>
>Any help or guidance will be greatly appreciated.
>
>Regards,
>
>Gary Willett
>Icarus Engineering / Solar Services LLC
>
>References:
>(1) Outback Application Note "AC Coupling 
>OutBack Power Radian Inverters with SolarEdge N. American Inverters"
><http://www.outbackpower.com/downloads/documents/technotes/ac_coupling_tech_note.pdf>http://www.outbackpower.com/downloads/documents/technotes/ac_coupling_tech_note.pdf
>
>(2) Outback Application Note "Adding the battery 
>back-up power option to existing grid-tied PV/solar systems"
><http://www.outbackpower.com/downloads/documents/flexcoupled/app_note_acc_new.pdf>http://www.outbackpower.com/downloads/documents/flexcoupled/app_note_acc_new.pdf
>
>(3) SolarEdge Application Note "SolarEdge Inverters, Power Control Options"
><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
>
>REF (2); Page 9 of 14 - Outback's AC Coupling Guideline Number Two:
>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.
>
>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).
>
>REF (3); Page 4 of 5 - SolarEdge/OutBack Radian Wiring Diagram:
>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).
>
>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".
>
>REF (1); Page 3 of 5 - SolarEdge Setup / Programming:
>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%.
>
>"DEFAULT" SolarEdge Programming
>0000 <100,1,00,Y> ----meaning = 100% power, 1.00 power factor, point is active
>0001 <0,1.00,Y> ----meaning = 0% power, 1.00 power factor, point is active
>
>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:
>(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%.
>
>(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%.
>
>"PROPOSED" SolarEdge Programming
>0000 <100,1,00,Y> ----meaning = 100% power, 1.00 power factor, point is active
>0001 <0,1.00,Y> ----meaning = 0% power, 1.00 power factor, point is active
>0010 <30,1.00,Y> ----meaning = 30% power, 1.00 power factor, point is active
>0011 <0,1.00,Y> ----meaning = 0% power, 1.00 power factor, point is active
>
>Is this doable?
>
>
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