Apxteck AT?MG250 User manual

AT‐MG250UserManual–V1.02
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AT‐MG250Micro‐inverterInstallationManual
ApxteckRenewableTechnologyCo.,Ltd.
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AT‐MG250UserManual–V1.02
ThanksforchoosingApxteckMicro‐Inverter.Foryourownsafetyandtoensuretheoperationof
theequipment,pleasereadthismanualcarefullybeforeinstallationandoperation.
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Allrightsreserved:Apxteckreservestherighttochangetheproductandthecontentofthis
manualwithoutWARNING.Usersarerecommendedtovisitthecompanywebsite
www.apxteck.comformoreinformationaboutnewproductsandlatestversionsofuser
manuals.
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Forthefurtherinformationortechnicalsupport,pleasecontactus.
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ApxteckRenewableTechnologyCo.,Ltd.
Add.:Nr.245XinJunhuanRd.,MinhangDist.,Shanghai201114,China.
Tel.:+862151619916
Fax.:+862151619917
www.apxteck.com
[email protected]
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AT‐MG250UserManual–V1.02
TableofContents
GENERALINFORMATION .................................................................................................................7
GENERALINTRODUCTIONFORTHEAT‐MG250MICRO‐INVERTERSYSTEM ...........................................................7
SPECIFICATIONSSHEET&PARAMETERS ..........................................................................................................8
SYMBOLSUSED.........................................................................................................................................9
INSTALLATIONPROCEDURES............................................................................................................9
THINGSTOBECHECKEDBEFOREINSTALLINGAT‐MG250..................................................................................9
STEP1:AFFIXTHESERIALNUMBERTOSYSTEMMAP .....................................................................................10
STEP2:ATTACHTHEAT‐MG250TOTHERACK .............................................................................................10
STEP3:GROUNDTHESYSTEM ...................................................................................................................11
STEP4:CONNECTINGTHEAT‐MG250WITHPVMODULE .............................................................................11
STEP5:CONNECTINGTHEAT‐MG250TOTHEACBREAKER............................................................................12
GENERALCONNECTINGCONFIGURATION .....................................................................................................12
STEP6:COMMISSIONING .........................................................................................................................12
AT‐MG250REPLACEMENT..............................................................................................................13
STEP1:DISCONNECTDCCABLES................................................................................................................13
STEP2:DISCONNECTACCABLES................................................................................................................13
STEP3:LOOSELAY‐INLUGONAT‐MG250 ..................................................................................................14
STEP4:LOOSETHEMOUNTINGSCREWS.......................................................................................................14
ACCESSORIES.................................................................................................................................14
MAINTENANCE&LEDINDICATIONS...............................................................................................15
MAINTENANCE .......................................................................................................................................15
LEDINDICATIONS....................................................................................................................................15
APPENDIX .....................................................................................................................................16
FACTORYLIMITEDWARRANTY....................................................................................................................16
WIRINGDIAGRAM...................................................................................................................................18
SYSTEMMODULEMAP ............................................................................................................................19
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AT‐MG250UserManual–V1.02
GeneralInformation
GeneralIntroductionfortheAT‐MG250Micro‐invertersystem
Witharevolutionarytechnology,AT‐MG250Micro‐invertermaximizestheenergyconversion
fromphotovoltaicsolarmodules,enhancessystemreliability,andgreatlysimplifiesthe
installationandreducesthemaintenancetimeandcost.
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EachMicro‐inverterworksindependentlywithonePVmodule,eachPVmodulehasindividual
MaximumPeakPowerTracking(MPPT)andensuresthatthemaximumpowerisexportedtothe
utilitygridregardlessoftheperformanceoftheotherPVmodulesinthearray.WhenPV
modulesinthearrayareaffectedbyshading,soiling,orientation,ormismatch,the
Micro‐inverterensurestopperformancefromallPVmodulesinthearray.
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TheAT‐MG250Micro‐inverterisagridconnecteddevice.Employsadvanceddigitalcontrol
technologytoinvertDCtoACwhichhastheidenticalfrequencyandphaseanduploadittothe
utilitygrid.ThefeaturesofAT‐MG250Micro‐inverteraresimplifiedinstallation,reliability,
stability,maximumenergyharvestandintelligentmonitoring.Thecompletedself‐protection
functionsgreatlyimprovethestabilityandreliabilityofthesolarsystem.
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TheAT‐MG250Micro‐invertersysteminclude,
●AT‐MG250Micro‐inverter,
●AT‐PR4KSolarPowerRouter,
●PowerHubweb‐basedmonitoringandanalysisinterface.

AT‐MG250UserManual–V1.02
Specificationssheet&Parameters
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AT‐MG250UserManual–V1.02
SymbolsUsed
Toreducetheriskofelectricalshock,andtoensurethesafeinstallationandoperationofthe
Micro‐Inverter,pleasereadthismanualcarefullyandpayattentiontothesafetysymbolsappear
throughoutthismanual.
DANGER
Thisindicatesahazardoussituation,whichifnotavoided,willresultindeathorseriousinjury.
WARNING
Thisindicatesasituationwherefailuretofollowinstructionsmaybeasafetyhazardorcause
equipmentmalfunction.Useextremecautionandfollowinstructionscarefully.
NOTE
TheNOTEsymbolsinthismanualindicateimportantproductinformation.
InstallationProcedures
ThingstobeCheckedbeforeInstallingAT‐MG250
ToinstallaApxteckMicro‐invertersystem,pleasehaveyourinstallertoreviewfollowingitems
first:
●ReadthespecificationsandwarningsoftheAT‐MG250Micro‐inverter,
●TypeofroofmaterialsuitableforinstallPVsystem,
●BroadbandInternetconnectionisneededforgenerationdataupload,
●AvailableEthernetsocket,
●Sufficientpublicgridpoint.
DANGER
AnyonewhoinstallsorreplacestheAT‐MG250Micro‐invertermustbeauthorizedandlicensed
personnel,whocanensurethesafetypracticeofaqualifiedassembly,installationor
replacement.
WARNING
DonotconnecttheAT‐MG250Micro‐invertertotheutilitygriduntilyouhavecompletedallof
theinstallationproceduresasdescribedinthefollowingsections.
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AT‐MG250UserManual–V1.02
WARNING
AT‐MG250Micro‐invertermatchwithmostPVmodules,pleasemakesurethemodule’sspecs
suitablewithMicro‐inverter’srange.
Step1:AffixtheSerialNumbertoSystemMap
TheApxteckSystemMapdisplaylocationofeachMicro‐inverterinyoursystem.Youmaycreate
thevirtualarrayinPowerHubasperthismap.
a. PeelingtheserialnumberlabelsfromtheMicro‐inverters.
b. AttachingthelabelsontheSystemMap.
Version1.00SerialNr.
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NOTE
IfadditionalSystemMapneeded,pleasegotowww.apxteck.comtodownload.
Step2:AttachtheAT‐MG250totherack
a. Choosethesuitablemethodofmountingthemicroinverter.
b. Theremustbeatleast10mmclearancebetweentheenclosureoftheMicro‐inverter,the
roofsurfaceandtherearofthePVmodule.
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AT‐MG250UserManual–V1.02
Step3:GroundtheSystem
ConsiderusingWEEBtypeclipsforimprovedearthconnection.
WARNING
TheMicro‐invertersmustbegroundedaccordingtolocalstandards.Groundingregulationsmay
varybymarket,makesuretofollowlocalrequirements.
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Step4:ConnectingtheAT‐MG250withPVModule
ACcables
a. ConnecttheMicro‐inverterstoeachotherthroughACinterconnectioncables.
b. Listenforaclickasconnectorsengage.
c. CoveranyunusedACconnectorwithasealingendcap.
WARNING
Donotexceed16piecesofAT‐MG250Micro‐invertersconnectedperbranch.
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DCcables
a. ConnecteachPVmodulestotheMicro‐inverters.

AT‐MG250UserManual–V1.02
WARNING
Makesuretherightpolarityofeachconnector.
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Step5:ConnectingtheAT‐MG250totheACbreaker
GeneralConnectingConfiguration
UsetheACextensioncable(5meters)toconnecttheMicro‐invertertotheACbreakerinsidethe
distributionbox.Thecolorcodeofeachterminalisshownbelow.
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Yellow/Green‐PE
Brown‐L
LightBlue‐N
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L‐Brown
N‐LightBlue
PE‐
Yellow/Green
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WARNING
FollowthelocalelectricalcodesandNationalelectricalcodesforwiring.
Step6:Commissioning
a. Checkallabovesteps(1~5).
b. TurnontheACbreakeroftheMicro‐invertersystem.
WARNING
QualifiedpersonnelonlymayconnecttheApxteckMicro‐invertertothepublicgridafterreceiving
approvalfromtheelectricalutilitycompany.
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AT‐MG250UserManual–V1.02
WARNING
AT‐MG250Micro‐inverterisGrid‐connecteddevice.DonotconnectthisunittoanACsourceorany
electricappliances.
AT‐MG250Replacement
IftheApxteckMicro‐inverterinyoursystemcannotworkproperly,pleasefollowstepsbelowto
replacethedefectiveMicro‐inverter.
DANGER
AnyonewhoinstallsorreplacestheAT‐MG250Micro‐invertermustbeauthorizedandlicensed
personnel,whocanensurethesafetypracticeofaqualifiedassembly,installationor
replacement.
Step1:DisconnectDCcables
DisconnecttheDCcablesbetweentheMicro‐inverterandthePVmodule’sjunctionbox.
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Step2:DisconnectACcables
PressthehookontheACconnectortodisconnecttheACcables.