SolarEdge SE50K User manual

SolarEdge
Extended Power
Commercial Inverter
Installation Guide
For Europe, APAC,&South Africa
Version 1.0

Disclaimers
Important Notice
Copyright©SolarEdgeInc.Allrightsreserved.
Nopartofthisdocumentmaybereproduced,storedinaretrievalsystemortransmitted,inanyformor
byanymeans,electronic,mechanical,photographic,magneticorotherwise,withoutthepriorwritten
permissionofSolarEdgeInc.
Thematerialfurnishedinthisdocumentisbelievedtobeaccurateandreliable.However,SolarEdge
assumesnoresponsibilityfortheuseofthismaterial.SolarEdgereservestherighttomakechangestothe
materialatanytimeandwithoutnotice.YoumayrefertotheSolarEdgewebsite(www.solaredge.com)
forthemostupdatedversion.
Allcompanyandbrandproductsandservicenamesaretrademarksorregisteredtrademarksoftheir
respectiveholders.
Patentmarkingnotice:seehttp://www.solaredge.com/patent
ThegeneraltermsandconditionsofdeliveryofSolarEdgeshallapply.
Thecontentofthesedocumentsiscontinuallyreviewedandamended,wherenecessary.However,
discrepanciescannotbeexcluded.Noguaranteeismadeforthecompletenessofthesedocuments.
Theimagescontainedinthisdocumentareforillustrativepurposesonlyandmayvarydependingon
productmodels.
Emission Compliance
Thisequipmenthasbeentestedandfoundtocomplywiththelimitsappliedbythelocalregulations.
Theselimitsaredesignedtoprovidereasonableprotectionagainstharmfulinterferenceinaresidential
installation.Thisequipmentgenerates,usesandcanradiateradiofrequencyenergyand,ifnotinstalled
andusedinaccordancewiththeinstructions,maycauseharmfulinterferencetoradiocommunications.
However,thereisnoguaranteethatinterferencewillnotoccurinaparticularinstallation.Ifthis
equipmentdoescauseharmfulinterferencetoradioortelevisionreception,whichcanbedeterminedby
turningtheequipmentoffandon,youareencouragedtotrytocorrecttheinterferencebyoneormore
ofthefollowingmeasures:
lReorientorrelocatethereceivingantenna.
lIncreasetheseparationbetweentheequipmentandthereceiver.
lConnecttheequipmentintoanoutletonacircuitdifferentfromthattowhichthereceiveris
connected.
lConsultthedealeroranexperiencedradio/TVtechnicianforhelp.
Changesormodificationsnotexpresslyapprovedbythepartyresponsibleforcompliancemayvoidthe
user’sauthoritytooperatetheequipment.
Disclaimers
Extended Power Commercial Inverter Installation Guide MAN-01-00402-1.0
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Support and Contact Information
IfyouhavetechnicalproblemsconcerningSolarEdgeproducts,pleasecontactus:
Country Phone E-Mail
Australia ([phone] [e-mail]
APAC (Asia Pacific)([phone] [e-mail]
Benelux NL (+31): 0800-7105
BE (+32): 0800-76633
[e-mail]
[e-mail]
China ([phone] [e-mail]
DACH & Rest of Europe ([phone] [e-mail]
France ([phone] [e-mail]
Italy ([phone] [e-mail]
Japan ([phone] [e-mail]
New Zealand ([phone] [e-mail]
US & Canada ([phone] [e-mail]
United Kingdom ([phone] [e-mail]
Greece ([phone]
[e-mail]
Israel ([phone]
Middle East & Africa ([phone]
South Africa ([phone]
Turkey ([phone]
Worldwide ([phone]
Beforecontact,makesuretohavethefollowinginformationathand:
lModelandserialnumberoftheproductinquestion.
lTheerrorindicatedontheSolarEdgeInverterSetAppmobileapplicationscreenorontheSolarEdge
monitoringplatformorbytheLED,ifthereissuchanindication.
lSystemconfigurationinformation,includingthetypeandnumberofmodulesconnectedandthe
numberandlengthofstrings.
lThecommunicationmethodtotheSolarEdgeserver,ifthesiteisconnected.
lTheinvertersoftwareversionasappearsintheIDstatusscreen.
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Support and Contact Information

Contents
Disclaimers 1
ImportantNotice 1
EmissionCompliance 1
Support and Contact Information 2
HANDLING AND SAFETY INSTRUCTIONS 7
SafetySymbolsInformation 7
IMPORTANTINVERTERSAFETYINSTRUCTIONS 7
Chapter 1: Introducing the SolarEdge Power Harvesting System 9
SolarEdgePowerOptimizer 9
ExtendedPowerCommercialInverter 10
SolarEdgeMonitoringPlatform 11
InstallationProcedure 11
InstallationEquipmentList 11
Chapter 2: Installing the Power Optimizers 13
Safety 13
InstallationGuidelines 13
Step1:MountingthePowerOptimizers 14
Step2:ConnectingaPVModuletoaPowerOptimizer 15
Step3:ConnectingPowerOptimizersinStrings 15
Step4:VerifyingProperPowerOptimizerConnection 17
Chapter 3: Installing the Primary and Secondary Unit(s) 18
PrimaryUnitPackageContents 18
SecondaryUnitPackageContents 18
IdentifyingtheUnits 18
PrimaryUnitInterface 18
ConnectionUnitInterface 21
SecondaryUnitInterface 22
MountingandConnectingthePrimaryandSecondaryUnit(s) 23
Chapter 4: Connecting the AC and Strings to the Connection Unit 28
GridConnectionGuidelines 28
ConnectingtheACGridtotheConnectionUnit 28
ConnectingtheACGridandGroundingtotheConnectionUnit 29
Grounding 29
SecondaryGrounding 30
ConnectingtheStringstotheConnectionUnit 31
SelectingaResidualCurrentDevice(RCD) 33
Chapter 5: Activating, Commissioning and Configuring the System Using SolarEdge Inverter
SetApp 34
Step1:ActivatingtheInstallation 34
Step2:CommissioningandConfiguringtheInstallation 35
SettingCountryandLanguage 36
Pairing 36
Communication 38
PowerControl 40
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Maintenance 41
Information 43
Step3:VerifyingProperActivationandCommissioning 44
ReportingandMonitoringInstallationData 44
TheSolarEdgeMonitoringSystem 44
ProvidingInstallationInformation 45
SiteMapperApplication 45
CreatingaSiteintheSolarEdgeMonitoringPlatform 46
PaperTemplate 46
ViewingSystemStatus 46
MainInverterStatus 47
MultipleInvertersStatus 48
CommunicationStatus 49
InverterEnergyStatus 50
MeterStatus 50
51
Chapter 6: Setting Up Communication 52
CommunicationOptions 53
Ethernet 53
RS485 53
Wi-Fi 53
GSM 53
CommunicationConnectors 54
CommunicationBoard 55
PrimaryUnitCommunicationBoard 55
ConnectionUnitCommunicationBoard 56
RemovingtheConnectionUnitCover 56
CreatinganEthernet(LAN)Connection 56
CreatinganRS485BusConnection 61
RS485BusConfiguration 64
VerifyingtheConnection 65
Appendix A: Errors and Troubleshooting 67
IdentifyingErrors 67
PowerOptimizerTroubleshooting 70
TroubleshootingCommunication 71
TroubleshootingEthernet(LAN)Communication 71
TroubleshootingRS485Communication 71
AdditionalTroubleshooting 71
Appendix B: Mechanical Specifications 73
PrimaryUnitandConnectionUnit 73
SecondaryUnit 73
Appendix C: SafeDC™ 74
Appendix D: External Fan Maintenance and Replacement 75
FanMaintenance 75
ExternalFanReplacement 75
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Appendix E: Replacing System Components 77
ReplacingthePrimaryUnit 77
ReplacingaSecondaryUnit 78
ReplacingtheConnectionUnit 78
RemovingtheConnectionUnit 78
InstallingaNewConnectionUnit 79
ConnectingtheConnectionUnittothePrimaryUnit 79
ReplacingPowerOptimizers 80
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Technical Specifications .................................................................................................................82

Version History
Version1(December 2017)
Extended Power Commercial Inverter Installation Guide MAN-01-00402-1.0
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HANDLING AND SAFETY INSTRUCTIONS
Duringinstallation,testingandinspection,adherencetoallthehandlingandsafetyinstructionsis
mandatory.Failure to do so may result in injury or loss of life and damage to the equipment.
Safety Symbols Information
Thefollowingsafetysymbolsareusedinthisdocument.Familiarizeyourselfwiththesymbolsandtheir
meaningbeforeinstallingoroperatingthesystem.
WARNING!
Denotes a hazard. It calls attention to a procedure that, if not correctly performed or adhered to, could
result in injury or loss of life. Do not proceed beyond a warning note until the indicated conditions
are fully understood and met.
CAUTION!
Denotes a hazard. It calls attention to a procedure that, if not correctly performed or adhered to, could
result in damage or destruction of the product. Do not proceed beyond a caution sign until the
indicated conditions are fully understood and met.
NOTE
Denotes additional information about the current subject.
IMPORTANTSAFETYFEATURE
Denotes information about safety issues.

DisposalrequirementsundertheWasteElectricalandElectronicEquipment(WEEE)regulations:
NOTE
Discard this product according to local regulations or send it back to SolarEdge.


IMPORTANTINVERTERSAFETYINSTRUCTIONS
SAVETHESEINSTRUCTIONS
WARNING!
The inverter cover must be opened only after shutting off the inverter ON/OFF switch located at the
bottom of the Primary Unit, above the Connection Unit. This disables the DC voltage inside the inverter
and opens the AC relays. Wait five minutes before opening the cover. Otherwise, there is a risk of
electric shock from energy stored in the capacitors.

WARNING
Before operating the inverter, ensure that the inverter is grounded properly.
WARNING!
Opening the inverter and repairing or testing under power must be performed only by qualified service
personnel familiar with this inverter.
HANDLING AND SAFETY INSTRUCTIONS
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WARNING!
Do not touch the PV panels or any rail system connected when the inverter switch is ON, unless
grounded.
WARNING!
SafeDC complies with IEC60947-3 when installing the system with a worst case SafeDC voltage (under
fault conditions) < 120V.
The worst case voltage is defined as: Voc,max+ (String Length-1)*1V,where:
lVoc,max = Maximum Voc (at lowest temperature) of the PV module in the string (for a string with
multiple module models, use the max value)
lString Length = number of power optimizers in the string
CAUTION!
This unit must be operated according to the technical specification datasheet provided with the unit.
CAUTION!
HEAVY OBJECT. To avoid muscle strain or back injury, use proper lifting techniques, and if required - a
lifting aid.
NOTE
Use PV modules rated according to IEC 61730 class A.
NOTE
The symbol appears at grounding points on the SolarEdge equipment. This symbol is also used in
this manual.
NOTE
A SolarEdge inverter may be installed in a site with a generator, however must not operate at the same
time as the generator. Operating an inverter and a generator simultaneously will void the warranty.
SolarEdge requires installing a physical or electronic interlock, which will prevent the generator and
inverter from operating simultaneously. Interlock procurement, installation, maintenance and support
are the responsibility of the installer. Damage to the inverter due to incorrect interlock installation or use
of an interlock that is incompatible with the SolarEdge system will render the SolarEdge warranty
invalid.
NOTE
The following warning symbols appear on the inverter warning label:
Risk of electric shock
Risk of electric shock from energy stored in the capacitor. Do not remove cover
until 5 minutes after disconnecting all sources of supply.
Hot surface – To reduce the risk of burns, do not touch.
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IMPORTANTINVERTERSAFETYINSTRUCTIONS

Chapter 1: Introducing the SolarEdge Power
Harvesting System
TheSolarEdgepowerharvestingsolutionisdesignedtomaximizethepoweroutputfromanytypeof
solarPhotovoltaic(PV)installationwhilereducingtheaveragecostperwatt.Thefollowingsections
describeeachofthesystem’scomponents.


Figure 1: The SolarEdge power harvesting system components
SolarEdge Power Optimizer
TheSolarEdgepoweroptimizersareDC-DCconvertersconnectedtoPVmodulesinordertomaximize
powerharvestingbyperformingindependentMaximumPowerPointTracking(MPPT)atthemodule
level.
Thepoweroptimizersregulatethestringvoltageataconstantlevel,regardlessofstringlengthand
environmentalconditions.
Thepoweroptimizersincludeasafetyvoltagefunctionthatautomaticallyreducestheoutputofeach
poweroptimizerto1Vdcinthefollowingcases:
lDuringfaultconditions
lThepoweroptimizersaredisconnectedfromtheinverter
lTheinverterON/OFFswitchisturnedOFF
lThesafetyswitchontheConnectionUnitisturnedOFF
lTheinverterACbreakeristurnedOFF
EachpoweroptimizeralsotransmitsmoduleperformancedataovertheDCpowerlinetotheinverter.
Twotypesofpoweroptimizersareavailable:
lModuleAdd-onpoweroptimizer–connectedtooneormoremodules
lSmartmodules-thepoweroptimizerisembeddedintoamodule
Chapter 1: Introducing the SolarEdge Power Harvesting System
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Extended Power Commercial Inverter
Theextendedpowercommercialinverter(referredtoas'inverter'inthismanual)efficientlyconvertsDC
powerfromthemodulesintoACpowerthatcanbefedintothemainACserviceofthesiteandfrom
theretothegrid.Theinverteralsoreceivesthemonitoringdatafromeachpoweroptimizerand
transmitsittotheSolarEdgemonitoringplatform(requiresInternetorCellularconnection).
TheinverteriscomprisedofonePrimaryUnitwithanintegratedConnectionUnitwithaDCSafety
Switch(referredtoas'ConnectionUnit'inthismanual)fordisconnectingtheDCpowerofaSolarEdge
system,andofoneortwoSecondaryUnits,dependingontheinverter'scapacity.TheSecondaryUnit(s)
areconnectedtotheprimaryunitwithAC,DCandcommunicationcables.
Eachunitoperatesindependentlyandcontinuestoworkincasetheothersarenotoperating.
Youcansetupamaster-slaveconfiguration,connectingupto31additionalinverterstoonemaster
inverter.

Figure 2: Primary Unit with two Secondary Units

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Extended Power Commercial Inverter

SolarEdge Monitoring Platform
TheSolarEdgemonitoringplatformenablesmonitoringthetechnicalandfinancialperformanceofoneor
moreSolarEdgesites.Itprovidespastandpresentinformationonthesystemperformancebothatthe
systemandmodulelevels.
Installation Procedure
ThefollowingistheprocedureforinstallingandsettingupanewSolarEdgesite.Manyofthesealsoapply
tomodificationofanexistingsite.
1. InstallingthePowerOptimizers,page13
2. MountingandConnectingthePrimaryandSecondaryUnit(s),page23
NOTE
It is recommended to connect communication connections (step 6 of this installation) before
connecting the AC, for easier access to the communication board.
3. ConnectingtheACandtheStringstotheConnectionUnit,page28
4. ActivatingandCommissioningtheSystemUsingSetApp,page34
5. ConfiguringtheSystemUsingSetApp,page38
6. SettingUpCommunicationpage52

Installation Equipment List
StandardtoolscanbeusedduringtheinstallationoftheSolarEdgesystem.Thefollowingisa
recommendationoftheequipmentneededforinstallation:
lAllenscrewdriverfor5mmscrewtypefortheinvertercover,ConnectionUnitcover,andinverterside
screws
lAllenscrewdriverforM5/M6/M8screwtypes
l17/32HEXAllenscrewdriverforACstudconnector
lSolarEdgesuppliedlevel
lStandardflat-headscrewdriversset
lNon-contactvoltagedetector
lCordlessdrillorscrewdriverandbitssuitableforthesurfaceonwhichtheinverterwillbeinstalled.
Useofanimpactdriverisnotrecommended.
lAppropriatemountinghardware(forexample:stainlessbolts,nuts,andwashers)forattaching:
othePrimaryandSecondaryUnit(s)mountingbracketstothemountingsurface
othepoweroptimizerstotheracking(notrequiredforsmartmodules)
lMC4crimper
l4xM8ringterminalsandasuitablecrimper
lWirecutters
lWirestrippers
lVoltmeter
Forinstallingthecommunicationoptions,youmayalsoneedthefollowing:
lForEthernet:
oCAT5/6twistedpairEthernetcablewithRJ45connector
oIfusingaCAT5/6cablespool:RJ45plugandRJ45crimper
Chapter 1: Introducing the SolarEdge Power Harvesting System
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lForRS485:
oFour-orsix-wireshieldedtwistedpaircable.
oWatchmakerprecisionscrewdriverset
Forsecondarygrounding:
lRingterminalcrimperfortheACwire
lRingterminal
lSerratedwasher
lGroundingscrew
lTwowashers
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Installation Equipment List

Chapter 2: Installing the Power Optimizers
Safety
ThefollowingnotesandwarningsapplywheninstallingtheSolarEdgepoweroptimizers.Someofthe
followingmaynotbeapplicabletosmartmodules:
WARNING!
When modifying an existing installation, turn OFF the inverter ON/OFF switch, the Connection Unit and
the AC circuit breaker on the main AC distribution panel.
WARNING!
Input and output connectors are not watertight until mated. Open connectors should be mated to each
other or plugged with appropriate watertight caps.
CAUTION!
Power optimizers are IP68/NEMA6P rated. Choose a mounting location where optimizers will not be
submerged in water.
CAUTION!
This unit must be operated according to the operating specifications provided with the unit.
CAUTION!
Cutting the power optimizer input or output cable connector is prohibited and will void the warranty.
CAUTION!
All PV modules must be connected to a power optimizer.
CAUTION!
If you intend to mount the optimizers directly to the module or module frame, first consult the module
manufacturer for guidance regarding the mounting location and the impact, if any, on module warranty.
Drilling holes in the module frame should be done according to the module manufacturer instructions.
CAUTION!
Installing a SolarEdge system without ensuring compatibility of the module connectors with the
optimizer connectors may be unsafe and could cause functionality problems such as ground faults,
resulting in inverter shut down. To ensure mechanical compatibility of the SolarEdge optimizers’
connectors with the PV modules’ connectors to which they are connected, use identical connectors
from the same manufacturer and of the same type on both the power optimizers and on the PV modules.
IMPORTANTSAFETYFEATURE
Modules with SolarEdge power optimizers are safe. They carry only a low safety voltage before the
inverter is turned ON. As long as the power optimizers are not connected to the inverter or the inverter is
turned OFF, each power optimizer will output a safe voltage of 1V.
Installation Guidelines
lFrame-mountedpoweroptimizersaremounteddirectlyonthemoduleframe,
regardlessofrackingsystem(rail-lessorwithrails).Forinstallationofframe-mounted
poweroptimizers,refertohttp://www.solaredge.com/sites/default/files/installing_
frame_mounted_power_optimizers.pdf.
Chapter 2: Installing the Power Optimizers
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lThestepsinthischapterrefertomoduleadd-onpoweroptimizers.Forsmartmodules,startfrom
Step3:ConnectingPowerOptimizersinStringsonpage15.Alsorefertothedocumentationsupplied
withthesmartmodules.
lThepoweroptimizercanbeplacedinanyorientation.
lIfconnectingmoremodulesthanoptimizerinputsinparallel,useabranchcable(availablefrom
SolarEdge).Somecommercialpoweroptimizermodelshaveadualinput.
lPositionthepoweroptimizercloseenoughtoitsmodulesothattheircablescanbeconnected.
lMakesuretousepoweroptimizersthathavetherequiredoutputconductorlength:
oMinimizetheuseofextensionsbetweenpoweroptimizers,anduseonlyifconnectionbetween
optimizersindifferentrowsorarraysisrequired.
oDonotuseextensioncablesbetweenthemodulesandthepoweroptimizers.
lTheminimumandmaximumstringlengthguidelinesarestatedinthepoweroptimizerdatasheets.
RefertotheSolarEdgeSiteDesignerforstringlengthverification.TheSolarEdgeSiteDesigneris
availableontheSolarEdgewebsiteathttp://www.solaredge.com/products/installer-tools/site-
designer#/.
lCompletelyshadedmodulesmaycausetheirpoweroptimizerstotemporarilyshutdown.Thiswill
notaffecttheperformanceoftheotherpoweroptimizersinthestring,aslongastheminimum
numberofunshadedpoweroptimizersconnectedinastringofmodulesismet.Ifundertypical
conditionsfewerthantheminimumoptimizersareconnectedtounshadedmodules,addmore
optimizerstothestring.
lToallowforheatdissipation,maintaina2.5cm/1"clearancedistancebetweenthepoweroptimizer
andothersurfaces,onallsidesexceptthemountingbracketside.
Figure 3: Power optimizer clearance
NOTE
The images contained herein are for illustrative purposes only and may vary depending on product
models.
Step 1: Mounting the Power Optimizers
Foreachofthepoweroptimizers1:
1. Determinethepoweroptimizermountinglocationandusethepoweroptimizer
mountingbracketstoattachthepoweroptimizertothesupportstructure.For
frame-mountedpoweroptimizersfollowtheinstructionssuppliedwiththe
optimizers,orrefertohttps://www.solaredge.com/sites/default/files/installing_
frame_mounted_power_optimizers.pdf.
1Not applicable to smart modules.
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Step 1: Mounting the Power Optimizers

2. Ifrequired,markthemountingholelocationsanddrillthehole.
CAUTION!
Do not drill through the power optimizer or through the mounting holes. The drilling vibrations can
damage the power optimizer and will void the warranty.
3. AttacheachpoweroptimizertotherackusingM6(1/4'')stainlesssteelbolts,nutsandwashersor
otherappropriatemountinghardware.Applytorqueof9.5N*m/7lb*ft.
4. Verifythateachpoweroptimizerissecurelyattachedtothemodulesupportstructure.
5. Recordpoweroptimizerserialnumbersandlocations,asdescribedinReportingandMonitoring
InstallationDataonpage44
Step 2: Connecting a PV Module to a Power
Optimizer
NOTE
Images are for illustration purposes only. Refer to the label on the product to identify the plus and
minus input and output connectors.
Foreachofthepoweroptimizers:
lConnectthePlus(+)outputconnectorofthemoduletothePlus(+)inputconnectorofthepower
optimizer.
lConnecttheMinus(-)outputconnectorofthemoduletotheMinus(-)inputconnectorofthe
poweroptimizer.
Figure 4: Power optimizer connectors
Step 3: Connecting Power Optimizers in Strings
Youcanconstructparallelstringsofunequallength,thatis,thenumberofpoweroptimizersineach
stringdoesnothavetobethesame.Theminimumandmaximumstringlengthsarespecifiedinthe
poweroptimizerdatasheets.RefertotheSolarEdgeSiteDesignerforstringlengthverification.
NOTE
lUse at least 11 AWG/ 4 mm² DC cables.
lThe total conductor length of the string (excluding power optimizers’ conductors; including home
runs and necessary extensions between optimizers) should not exceed:
o2300 ft./ 700 m from DC+ to DC- of the inverter
Chapter 2: Installing the Power Optimizers
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NOTE
The DC bus of each unit is separate and not shared for all units. Therefore in addition to following the
inverter design rules, each unit should follow the unit design rules as detailed in Technical
Specifications on page 1
1. ConnecttheMinus(-)outputconnectorofthestring’sfirstpoweroptimizertothePlus(+)output
connectorofthestring’ssecondpoweroptimizer.
2. Connecttherestofthepoweroptimizersinthestringinthesamemanner.

Figure 5: Power optimizers connected in series
3. Ifyouintendtomonitortheinstallation,usingtheSolarEdgemonitoringplatform,recordthe
physicallocationofeachpoweroptimizer,asdescribedinProvidingInstallationInformationonpage45.
WARNING!
Input and output connectors are not watertight until mated. Open connectors should be mated to
each other or plugged with appropriate watertight caps.
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Step 3: Connecting Power Optimizers in Strings

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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poweroptimizersbetweenthePVmodulesandthe
inverter,theshortcircuitcurrentISCandtheopencircuitvoltageVOCholddifferentmeaningsfrom
thoseintraditionalsystems.
FormoreinformationabouttheSolarEdgesystem’sstringvoltageandcurrent,referto
theVOCandISCinSolarEdgeSystemsTechnicalNote,availableontheSolarEdgewebsiteat:
http://www.solaredge.com/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.
NOTE
Since the inverter is not yet operating, you may measure the string voltage and verify correct polarity
on the DC wires inside the Connection Unit.
Fortroubleshootingpoweroptimizeroperationproblems,refertoPowerOptimizerTroubleshootingon
page70.

Chapter 2: Installing the Power Optimizers
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Chapter 3: Installing the Primary and
Secondary Unit(s)
Installtheunitseitherbeforeorafterthemodulesandpoweroptimizershavebeeninstalled.
FirstinstallthePrimaryUnit,thentheSecondaryUnit(s)(inanyorder).
CAUTION!
Do not rest the connectors at the bottom of the units on the ground, as it may damage them. To rest
a unit on the ground, lay it on its back.
Primary Unit Package Contents
lPrimaryUnit(comprisedofaninverterandConnectionUnit)andpre-assembledcablesthatconnect
totheSecondaryUnit(s)
lMountingbracketkit
lTwoAllenscrewsforfasteningtheunittothemountingbracket
lQuickInstallationguide
lForbuilt-inwirelesscommunication:antennaandmountingbracket
lLevel,formarkingthemountingbrackets'positions
Secondary Unit Package Contents
lSecondaryUnit
lMountingbracketkit
lTwoAllenscrewsforfasteningtheunittothemountingbracket
Identifying the Units
ThestickersonthePrimaryUnitandontheConnectionUnitspecifytheinverter'sSerial Numberand
Electrical Ratings.
WhenopeningasiteintheSolarEdgemonitoringplatformandwhencontactingSolarEdgesupport,
providetheinverter'sserialnumber.
Primary Unit Interface
Figure 6: Primary Unit bottom and side interfaces
lMounting hole: forsecuringtheunittothebracketandforconnectinganoptionalsecondary
groundingcable.
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Chapter 3: Installing the Primary and Secondary Unit(s)

lGrounding screw:forconnectinganoptionalsecondarygroundingcable.
lAC and DC conduit entries:ConnectionpointsoftheConnectionUnit.
lTwo communication glands,forconnectionofcommunicationoptions.Eachglandhasthree
openings.RefertoSettingUpCommunicationonpage52formoreinformation.
lON/OFF/P Switch:
Figure 7: ON/OFF/P switch
oON (1)-TurningthisswitchON(afteroptimizerpairing)startstheoperationofthepower
optimizers,enablespowerproductionandallowstheinvertertobeginexportingpowertothe
utilitygrid
oOFF (0)-TurningthisswitchOFFreducesthepoweroptimizervoltagetoalowsafetyvoltageand
inhibitsexportationofpower.WhenthisswitchisOFF,thePrimaryandSecondaryUnits'control
circuitryremainspoweredup.
oP-MovingandreleasingtheswitchallowsviewingsysteminformationviatheLEDsandonthe
SolarEdgeSetAppmobileapplicationscreenandperformingfunctions:
P Position duration Function Comments
Switch moved to P for less than
5 seconds, then released.
oDisplays production information for 5
seconds on the SetApp screen.
oDisplays error type indications (if exist)
for 5 seconds.
oActivates the Wi-Fi access point for
connecting to the SolarEdge Inverter
SetApp
While the switch is in
P, all LEDs are ON
Switch moved to P for more than
5 seconds, then released. Starts pairing
LEDs
lLEDs:threeLEDsindicate,bycolorandstate(on/off/blinking1/flickering2),differentsystem
information,suchaserrorsorperformanceindications.
Generally,themainLEDindicationsare:
lBlueON-theinverteriscommunicatingwiththemonitoringplatform
lGreenON-thesystemisproducing
lGreenblinking-ACisconnectedbutthesystemisnotproducing
lRedON-systemerror
1Blinking = Turns ON and OFF for the same duration
2Flickering = Turns ON for 100 mS and turns OFF for 5 seconds
Chapter 3: Installing the Primary and Secondary Unit(s)
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