Install Manual

Step 4: Verifying Proper Power Optimiser
Connection
Whenamoduleisconnectedtoapoweroptimizer,thepoweroptimizeroutputsasafevoltageof1V
(±0.1V).Therefore,thetotalstringvoltageshouldequal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PVmodulesareexposedtosunlightduringthisprocess.Thepoweroptimizerwillonlyturn
ONifthePVmoduleprovidesatleast2W.
InSolarEdgesystems,duetotheintroductionofpoweroptimizers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:
https://www.solaredge.com/sites/default/files/isc_and_voc_in_solaredge_sytems_
technical_note.pdf.
To verify proper power optimizer 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.
NOTE
Since the inverter is not yet operating, you may measure the string voltage and verify correct polarity
on the DC wires inside the Safety Switch.
Fortroubleshootingpoweroptimizeroperationproblems,refertoPowerOptimizerTroubleshootingon
page64.
-Three Phase System Installation Guide MAN-01-00527-1.1
22
Step 4: Verifying Proper Power Optimiser Connection