How many kWh are you shooting for? > On Oct 17, 2016, at 9:54 PM, Gary Willett <[email protected]> > 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; #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? > > > _______________________________________________ > List sponsored by Redwood Alliance > > List Address: [email protected] > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://www.mail-archive.com/[email protected]/maillist.html > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org >
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