SolarEdge StorEdge SE7600A-USS - Chapter 3: Installing the Inverter; Inverter Components and Mounting

Step 4: Verifying Proper Power Optimizer
Connection
Whenamoduleisconnectedtoapoweroptimizer,thepoweroptimizeroutputsasafevoltageof1V.
Therefore,thetotalstringvoltageshouldbeequalto1Vtimesthenumberofpoweroptimizers
connectedinseriesinthestring.Forexample,if10poweroptimizersareconnectedinastring,then10V
shouldbeproduced.
Makesurethemodulesareexposedtosunlightduringthisprocess;otherwise,thepoweroptimizersmay
notbepowered.Ifyouuseatracker,thepoweroptimizerwillturnONonlyifthetrackeristrackingthe
sunandthemoduleprovidesatleast2W.
InSolarEdgesystems,duetotheintroductionofpoweroptimizersbetweenthePVmodulesandthe
inverter,theshortcircuitcurrentI
SC
andtheopencircuitvoltageV
OC
holddifferentmeaningsfrom
thoseintraditionalsystems.
FormoreinformationabouttheSolarEdgesystem’sstringvoltageandcurrent,referto
theV
OC
andI
SC
inSolarEdgeSystemsTechnicalNote,availableontheSolarEdgewebsiteat:
http://www.solaredge.us/files/pdfs/isc_and_voc_in_solaredge_systems_technical_
note.pdf.
To verify proper power optimizers connection:
Measurethevoltageofeachstringindividuallybeforeconnectingittotheotherstringsortotheinverter.
Verifycorrectpolaritybymeasuringthestringpolaritywithavoltmeter.Useavoltmeterwithatleast
0.1Vmeasurementaccuracy.
Fortroubleshootingpoweroptimizeroperationproblems,refertoPowerOptimizerTroubleshootingon
page90.
SolarEdge StorEdge Installation Guide MAN-01-000262-1.2
20
Step 4: Verifying Proper Power Optimizer Connection