SolarEdge storedge User manual

SolarEdge
StorEdge
Installation Guide
For Smart Energy Management
using the StorEdge Interface
For Europe, APAC &South Africa
Version 1.2

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/groups/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
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Contents
Disclaimers 1
ImportantNotice 1
EmissionCompliance 1
Contents 2
HANDLING AND SAFETY INSTRUCTIONS 3
SafetySymbols 3
IMPORTANTSAFETYINSTRUCTIONS 3
SystemMaintenance 4
Chapter 1: Overview 5
TheStorEdgeSolutionComponents 5
InstallationWorkflow 6
Chapter 2: Meter Installation 7
Chapter 3: StorEdge Interface Installation 9
UnpackingandIdentifyingtheProduct 9
MountingtheStorEdgeInterface 9
ConnectingtheStorEdgeInterface 10
ConnectingtheStorEdgeInterfacetotheInverter 11
ConnectingtheStorEdgeInterfacetoAC 13
ConnectingtheStorEdgeInterfacetotheBatteryPack 14
Chapter 4: System Configuration 18
UpgradingtheInverterFirmwareVersion 18
ConfiguringtheRS485BusforBatteryandMeterConnection 19
ConfiguringMaximumSelf-consumption 21
MaximizeSelf-consumption 21
ProfileProgramming(fortimeofusearbitrage) 21
Starting-uptheSystem 22
Appendix A: Troubleshooting 24
CommunicationTroubleshooting 24
Devicetype,numberandprotocolaredisplayedincorrectly 24
TroubleshootingEthernetCommunication 24
MeterTroubleshooting 25
<OK>isnotdisplayed 25
Anerrormessageisdisplayed 25
Total[Wh]Importvalueisnotadvancing 25
BatteryTroubleshooting 26
StorEdgeInterfaceLEDs 27
Appendix B: StorEdge Interface Technical Specifications 28

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Contents

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
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 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 inverter. This disables the DC voltage inside the inverter. Wait five minutes before
opening the cover. Otherwise, there is a risk of electric shock from energy stored in the capacitors.
WARNING!
For StorEdge interface units with an ON/OFF Switch - The ON/OFF switch shuts off the
battery, however does not de-energize the DC lines.
To reduce all components to safe voltage, disconnect all power sources to the system components
prior to any system maintenance procedure:
lDisconnect the AC to both the inverter and StorEdge Interface.
lTurn OFF the inverter ON/OFF switch.
lTurn OFF the StorEdge Interface ON/OFF switch.
HANDLING AND SAFETY INSTRUCTIONS
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WARNING!
Do not remove the StorEdge Interface cover before five minutes have elapsed after disconnecting all
sources of power, and shutting OFF the inverter and the StorEdge Interface.
WARNING!
Before operating the system, ensure that the power cable and wall outlet have been grounded
properly.
WARNING!
When handling the battery, adhere to all manufacturer safety instructions.
CAUTION!
This unit must be operated under the specified operating conditions as described in the technical
specifications supplied with the unit.
NOTE
The battery used must be NRTL certified.
NOTE
For battery decommissioning and disposal, follow the manufacturer requirements and instructions.
NOTE
The StorEdge Interface is IP65 rated. Unused connectors and glands should be sealed with the
provided seals.
NOTE
The symbol appears at grounding points on the SolarEdge equipment. This symbol may also be
used in this manual.
System Maintenance
Priortoanysystemmaintenanceprocedure,disconnectallpowersourcestothesystemcomponents,
asdescribedinthissection.
1. TurnOFFtheinverterON/OFFswitch,andwaituntiltheLCDindicatesthattheDCvoltageissafe
(<50V),orwaitfiveminutesbeforecontinuingtothenextstep.
WARNING!
If you cannot see the inverter panel, or if a malfunction is indicated on the LCD panel, wait five
minutes for the input capacitors of the inverter to discharge.
2. TurnOFFtheinverterSafetySwitch(ifapplicable).
3. TurnOFFtheACswitchonthemaincircuitboard.
4. Ifapplicable,turnOFFtheStorEdgeInterfaceON/OFFswitch.
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System Maintenance

Chapter 1: Overview
SolarEdge’sStorEdge™solutionforSmartEnergyManagementusestheStorEdgeInterfacetoconnect
thebatterytotheinverter.
Powerisstoredinthebatteryandcanbeusedforvariousapplicationssuchasmaximizedself-
consumptionandtimeofuseprofileprogramming.Forbackuppower,aninverterspecificallydesigned
forbackupapplicationsisrequired;thisinverterisnotinthescopeofthisdocument.
The StorEdge Solution Components
lThe SolarEdge Inverter
lThe SolarEdge Meter-Themeterisusedbytheinverterforexport/consumptionreadings,andfor
SmartEnergyManagementapplications,suchas:exportlimitationandmaximizingself-consumption.
lThe StorEdge Interface-TheStorEdgeInterfaceconnectsthebatterytotheinverterthroughfuses,
andsuppliescontrolandmonitoringsignalstothebatteryforoperation.
lThe Battery-ADCcoupledbatterydesignedtoworkwiththeSolarEdgesystem.
Figure 1: StorEdge system components
NOTE
lOnly one battery and one interface can be connected to each inverter.
lAdditional SolarEdge inverters (without batteries) can be connected with RS485. The inverters will
participate in export limitation and maximizing self-consumption (Maximizing self-consumption for
multiple inverters supported from Q2 2016).
Connecting multiple inverters with RS485 master-slave connection requires an RS485 Expansion
Kit (available from SolarEdge).
lPV modules connected to power optimizers are not mandatory for Time of Use (TOU) profile
programming and for backup power.
Chapter 1: Overview
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Installation Workflow
WheninstallingtheStorEdgesystem,followthisworkflowtoensureallthecomponentsareconnected
andfunctioningcorrectly.
PlantheStorEdgesystemlayout:
lThebatteryandStorEdgeInterfacewillconnecttotheDCsideoftheinverter.Sincetheinverter
DCconnectionsareonitsleftside,itisrecommendedtopositionthebatteryandinterfacetothe
leftoftheinvertertosimplifywiring.
lTosimplifycablemanagement,aminimumdistanceof1.5mbetweenbatteryandinterfaceis
recommended.
Figure 2: System Layout
Step 1-PV system installation-modules,poweroptimizersandinverter(s).Refertothefollowing
chaptersofthe SolarEdge Installation Guidesuppliedwiththeinverterandavailableat
http://www.solaredge.com/files/pdfs/products/inverters/guides/se-inverter-installation-guide.pdf:
lInstallingthePowerOptimizers(ifapplicable)
lInstallingtheInverter
lConnectingtheACandtheStringstotheInverter
lActivatingtheinverter-asdescribedintheCommissioningchapteroftheSolarEdgeInstallation Guide,
usingtheactivationcardsuppliedwiththeinverter.
lUpgradingtheinverterfirmwareversion,usingtheupgradecardsuppliedwiththeStorEdge
Interface.
lPairingthesystem-asdescribedintheCommissioningchapteroftheSolarEdgeInstallation Guide
lSettingUpCommunication
Step 2- Electricity Meter installation (required for Smart Energy Management).RefertoMeter
Installationonpage7.
Step 3-StorEdge Interface installation and connectionasdescribedinStorEdge Interface Installationon
page9.
Step 4-Connect the battery to the StorEdge Interface and mount the battery1.Refertothe
installationinformationinthemanufacturerdocumentation,andtoConnecting the StorEdge Interface to
the Battery Packonpage14.
Step 5-Configuring the communication between the inverter and the other devices(meter,battery,
etc.).RefertoConfiguring the RS485 Bus for Battery and Meter Connectiononpage19.
Step 6-Configuring the StorEdge application.RefertoConfiguring Maximum Self-consumptiononpage21.
1To gain better accessibility to the battery connection panel, it is recommended to connect the battery cables before
mounting it on the wall.
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Installation Workflow

Chapter 2: Meter Installation
TheStorEdgesolutionrequiresconnectingameterforSmartEnergyManagementapplications,suchas
exportlimitationandmaximizingself-consumption.
Themetertype(singleorthreephase)andnumberofcurrenttransformers(CTs)shouldbeselectedper
thegridconnectionandenergymanagementapplicationratherthanaccordingtotheinvertermodel.
TheCTsaresuppliedwith2mtwistedpairwiresforconnectingtheCTs.
ToinstalltheSolarEdgemeter,refertototheinstallationguidesuppliedwithit:
http://www.solaredge.com/files/pdfs/solaredge-meter-installation-guide.pdf.
ThemeterisconnectedtotheinverterusingRS485.
RS485wiringspecifications:
lCabletype:Min.3-wireshieldedtwistedpair(a4-wirecablemaybeused)
lWirecross-sectionarea:0.2-1mm²/24-18AWG(aCAT5cablemaybeused)
NOTE
The inverter RS485 bus should be connected to the battery (via the StorEdge interface) and meter.
Connecting multiple inverters (or an external logger) with RS485 master-slave connection requires an
RS485 Expansion Kit (available form SolarEdge Refer to
http://www.solaredge.com/files/pdfs/RS485_expansion_kit_installation_guide.pdf).
To connect the meter to the inverter:
1. Removethesealfromoneoftheopeningsincommunicationgland#2atthebottomoftheinverter
andinserttheRS485wiresfromthemeterthroughtheopening.
Figure 3: Communication glands
2. Pulloutthe9-pinRS485connectorlocatedonthecommunicationboard.
Figure 4: Inverter RS485 connector
Chapter 2: Meter Installation
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3. Connectthewires:
IfyouhaveameterwithSolarEdgelogo,connectasillustratedbelow:
Figure 5: Meter RS485 connections (meter with SolarEdge label)
IfyouhaveameterwithWattNodelogo,connectasillustratedbelow:
Figure 6: Meter RS485 connections (meter with WattNode label)
4. IftheSolarEdgedeviceisattheendoftheRS485bus,terminatetheinverterbyswitchinga
terminationDIP-switchinsidetheinvertertoON(topposition).Theswitchislocatedonthe
communicationboardandismarkedSW7asfollows:
Figure 7: RS485 termination switch
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Chapter 2: Meter Installation

Chapter 3: StorEdge Interface Installation
Unpacking and Identifying the Product
Anidentificationlabelwithproductspecificationsisattachedtoeachdevice.

Figure 8: Product label
Checktheequipmentfordamagebeforestartinginstallation:Therearenolooseparts.Allpartsareeither
mountedorlocatedintheaccessorykit.Ifanydamageisfound,documentthedamage,andcontact
SolarEdge.

Mounting the StorEdge Interface
1. DeterminetheStorEdgeInterfacemountinglocation,onawallorpole,asfollows:
lMinimumdistancefromthebattery:1.5m(5ft)
lMaximumdistancefromthebattery:5m(15ft)
lMaximumdistancefromtheinverter:100m(328ft)
lMaintainaminimum20cm(8”)clearancebetweentheStorEdgeInterfaceandotherobjects.
Figure 9: StorEdge Interface clearance
Chapter 3: StorEdge Interface Installation
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2. Installthebracketwiththesemi-circlesfacingdown,asshownbelow.Verifythatthebracketisfirmly
attachedtothemountingsurface.
Figure 10: Mounting bracket
3. Installtheinterface:AttachtheStorEdgeinterfacebackbracketstothemountedbracketusingthe
foursuppliedscrews.Tightenthescrewswithatorqueof9N*m/6.6lb*ft.
Figure 11: The StorEdge Interface
4. Loosenthe4AllenscrewsoftheStorEdgeInterfaceandremovethecover.
Connecting the StorEdge Interface
Figure 12: StorEdge Interface connectors
WARNING!
For StorEdge interface units with an ON/OFF Switch - The ON/OFF switch shuts off the
battery, however does not de-energize the DC lines.
To reduce all components to safe voltage, disconnect all power sources to the system components
prior to any system maintenance procedure:
lDisconnect the AC to both the inverter and StorEdge Interface.
lTurn OFF the inverter ON/OFF switch.
lTurn OFF the StorEdge Interface ON/OFF switch.
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Connecting the StorEdge Interface

Connecting the StorEdge Interface to the Inverter
To connect to the inverter DC:
1. PrepareonepairofDCcableswithMC4connectorsatbothends-maleatoneendandfemaleatthe
otherend.
2. Connectoneendofthecablestotheinverter,andconnecttheotherendtotheDC+andDC-input
connectorsmarkedINV OUT.
NOTE
If all the inverter DC inputs are connected to PV strings, use a branch cable (available from
SolarEdge) to connect the StorEdge Interface to the inverter DC input.
To connect RS485 communication to the inverter:
RS485wiringspecifications:
lCabletype:Min.3-wireshieldedtwistedpair(a4-wirecablemaybeused)
lWirecross-sectionarea:0.2-1mm²/24-18AWG(aCAT5cablemaybeused)
1. ConnectoneendtotheRS485terminalblockmarked"RS485toInv."intheStorEdgeInterface:
a. Opengland#2.
b. Removethesealfromoneoftheopeningsandinsertthewirethroughtheopening.
c. Connectthewireendsinthe A, BandGpins(useatwistedpairforAandB):Useaflatblade
screwdrivertopresstheprotrusionatthetopoftheterminalblockandopentheconnection
hole;insertthewireandreleasetospringbackandclampthewire.
YoucanuseanycolorwireforeachoftheA,BandGconnections,aslongasthesamecolorwire
isusedforbothApins(inverterandStorEdgeInterface,thesamecolorforbothBpinsandthe
samecolorforbothGpins.
Figure 13: RS485 connector in the StorEdge Interface
2. Connecttheotherendofthecommunicationcabletotheinvertercommunicationboard:
NOTE
The wires from the meter and from the StorEdge Interface are inserted into the same pins in the
inverter RS485 terminal block. Make sure that the meter wires are not disconnected when
inserting the Interface wires.
a. Opentheinvertercoverasdescribedinitsmanual.
Chapter 3: StorEdge Interface Installation
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b. Removethesealfromoneoftheopeningsinthecommunicationglandandinsertthewire
throughtheopening.
Figure 14: Communication glands
c. Pulloutthe9-pinRS485terminalblockconnector,asshownbelow:
Figure 15: Inverter RS485 terminal block
d. LoosenthescrewsofpinsA(+),B(-),andGontheleftoftheRS485terminalblock.
e. InsertthewireendsintotheG, AandBpins.
3. Checkthatthewiresarefullyinsertedandcannotbepulledouteasily.
Figure 16: Connections to the inverter (and meter)
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Connecting the StorEdge Interface to the Inverter

Connecting the StorEdge Interface to AC
NOTE
The AC is used for auxiliary power only and does not carry high power.
Useathree-wirecablewithacrosssectionof1-2mm2.
To connect to AC:
1. TurnOFFtheACpowersourcetobeconnectedtotheinterface.
2. RemovetheinterfaceACsealinggland.
3. Stripoff5/16"(8mm)oftheACcableinsulationandexposetwolinewiresandonegroundingwire.
4. InserttwowireendsintotheACterminals(L,N).Fastenthescrewswithatorqueof0.67N*m/0.5
lb*ft.
Figure 17: AC and grounding connections
5. Connectthegroundingwiretothegroundingterminal(bus-bar).Youcanusethebus-bartoconnect
thebatterygroundingcable.
Figure 18: StorEdge Interface grounding
Chapter 3: StorEdge Interface Installation
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Connecting the StorEdge Interface to the Battery Pack
Beforeinstallingthebatterypackaccordingtotheinstructionsprovidedbythebatterymanufacturer,
connectthebatterytotheStorEdgeInterfaceasdescribedinthissection.
Followtheseguidelines:
lForeasyaccesstobatteryconnectors,itisrecommendedtoconnectthecablestothebatteryand
tosetallthebatteryDIPswitchestotheircorrectpositionswhilethebatteryisstillontheground.
Thefollowingprocedureisrecommended:
a. Connectallthewirestothebatteryconnectionpanel
b. Mountthebattery
c. ConnecttotheStorEdgeInterface.
lMeasurethenecessarylengthbetweentheStorEdgeInterfaceandthebatteryforallcables.
lTieandwrapthecablestoavoidpullingthemoutduringmounting.
lBesuretoadheretoallsafetycautionsandinformationinthebatterydocumentation.
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Connecting the StorEdge Interface to the Battery Pack

To connect the battery pack and the interface:
1. Preparecablesandconnectasdescribedinthefollowingtable:
Recommended
cable type (min-max
cross section)
StorEdge Interface
connection
Tesla battery
connection
Connection
method
DC
One pair of PV DC cables
with a cross section of 6
(4-6)mm2, 600V
insulated, with MC4
connectors at one end.
BAT DC + DC +
BAT DC - DC -
12V thermal power input
2-wire shielded twisted
pair cable with cross
section of 1.5 (0.1-2.5)
mm², 600V insulated
Battery Thermal V- (black) THERMAL -
Push the lever to open
the connection, insert
the wire and release
the lever when the wire
is clamped.
Battery Thermal V+ (red) THERMAL +
Control and monitoring
5-wire shielded twisted
pair cable with a cross
section of 0.2 (0.2-1.5)
mm².
A CAT5 600V insulated
cable can also be used.
5-pin communication terminal
block:
communication port 1
(located closer to the
DIP switches): Press the protrusion at
the top of the terminal
block to open the
connection hole, insert
the wire and release to
spring back and clamp
the wire.
En (Enable) ENABLE
V+ LOGIC +
G (RS485) LOGIC -
B (RS485)1COM LO1
A (RS485) COM HI
Modbus DIP switch
setting:
oS2, S6: Left
oS1, S5: DOWN
oS3, S4: UP
ID DIP switch setting:
All (1,2,3) to the right (0
position)
Refer to Figure 19 and
Figure 20
Battery grounding
Optionally connect to the second
grounding spring terminal (see
figure Figure 17)
Grounding lug
2. Closetheinterfacecover:Attachthecoverandsecureitbytighteningthefourscrewswithatorque
of1.2N*m/0.9ft.*lb.
1Must be twisted pair
Chapter 3: StorEdge Interface Installation
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Figure 19: StorEdge Interface Connections
Connecting the StorEdge Interface to the Battery Pack
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Figure 20: Battery DIP switches
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Connecting the StorEdge Interface to the Battery Pack

Chapter 4: System Configuration
ThischapterdescribeshowtoconfigureyourStorEdgesystembysettingupthecommunication
betweenthesystemcomponentsandsettinguptherequiredapplication.TousetheStorEdge
applications,theinvertercommunicationboardfirmware(CPU)versionmustbe3.xxxxandlater.Ifyou
haveaninverterwithCPUversion2.xxxx,contactSolarEdgesupport.
Upgrading the Inverter Firmware Version
UpgradetheinverterfirmwareusingthecardsuppliedwiththeStorEdgeInterface.
To upgrade the inverter firmware:
1. Makesuretheinverterhasbeenactivatedusingthecardsuppliedwiththeinverter.
2. Ifapplicable-makesuretheON/OFFswitchoftheStorEdgeInterfaceisOFF.
3. MakesuretheON/OFFswitchoftheinverterisOFF.
4. Insertthecardintothecommunicationboardslotmarked“CARD”.
Figure 21: Inserting the upgrade card
5. TurnontheACtotheStorEdgeInterface.
6. TurnontheACtotheinverter.
WARNING!
ELECTRICAL SHOCK HAZARD. Do not touch uninsulated wires when the inverter cover is
removed.
7. EntertheinverterSetupmode:PresstheinternalEnterbuttonfor5-10secondsandrelease.Enter
thepassword12312312.
8. SelectMaintenanceèSW Upgrade – SD Card.TheLCDshows:Running Script...èDone!
IftheLCDshows:Script error,contactSolarEdgeSupport.

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Chapter 4: System Configuration

Configuring the RS485 Bus for Battery and Meter
Connection
ThissectiondescribeshowtosetuptheRS485communicationbetweentheinverter,meter,StorEdge
Interface,andbattery.
To configure the RS485 bus:
1. SelectCommunicationè RS485-1 Conf è Device Type è Multi Devices.Alistofdevicesis
displayed.
D e v i c e T y p e < M L T >
M e t e r 1 < - - - >
M e t e r 2 < - - - >
B a t t e r y 1 < - - - >
2. SelectMeter 2.Themeterconfigurationscreenisdisplayed:
D e v i c e T y p e < M T R >
P r o t o c o l < W N >
D e v i c e I D < 2 >
C T R a t i n g < 0 >
M e t e r F u n c . < N o n e >
3. Configurethemeter:
a. SelectDevice Type è Revenue Meter
b. SelectProtocol è WattNode
c. VerifythatDevice IDissetto 2.
d. SettheCTvaluethatappearsontheCTlabel: CT Rating è <xxxxA>.
IfCTresetsto0,checkthecommunicationasdescibedinstepbbelow.
e. ForameterinstalledstthegridconnectionpointselectMeter Func.è Export+Import.
Export+Import
E x p o r t
Consumption
P r o d u c t i o n
I m p o r t
N o n e
TheselectedoptionisdisplayedintheRS485Confscreenas<E+I>.
4. SelectBattery 1.Thebatteryconfigurationscreenisdisplayed:
D e v i c e T y p e < B A T >
P r o t o c o l < T 7 4 >
D e v i c e I D < 2 4 >
B a t t e r y I n f o < >
5. SelectDevice Type èBattery Pack.
Chapter 4: System Configuration
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