Specifications

PV Array Commissioning | O&M | Auditing | Troubleshooting
I-V Curve Measurement
TheI-Vcurvemeasurement
providesIsc,Voc,Imp,Vmp,
Pmax,Fill
Factor,and
Performance
Factor —
theratioof
measured
toexpected
maximumpower.Themeasure-
mentistypicallyperformedata
combinerbox,usingthefuses
toselectthestringundertest.
I-V Curve Accuracy
and Detail
ThedesignofthePVAisoptimizedtoaccurately
measurebothstandardandhighefciencymodules,
andthenumberofI-Vcurvepointscanbesetto
500fordemandingapplications.
High Throughput in Hot Conditions
AllI-Vcurvetracersabsorbenergywitheach
measurement.ThePVA’shighthermalcapacity
allowsittocommission1MWinlessthan2hours
withoutoverheating,eveninenvironmentsexceeding
43Cambient.
Time-Saving User Interface
WithatabletPCasyouruserinterface
youcanperformmoretestsperhour
anddisplaythedatainmultipleeasyto
readformats.Saveyourmeasurements
bysimplytouchingthearraytree.The
PCinterfacealsoallowsfutureaddition
ofdataanalysistoolsfortheO&M
application.
Data Analysis and Reporting
TheI-VDataAnalysisTool,providedwiththePVA,
automatestheprocessofpreparingdetailed,
professionalreportsofyourmeasurementresults.
Thetoolgeneratesatableofthekeyperformance
parametervaluesforeachstring,groupI-Vgraphsfor
eachcombinerbox,andhistogramsshowinghowthe
dataforeachparameterisdistributed.
SolSensor
™
Wireless PV Reference Sensor
SolSensorprovidesirradiance,temperature,
andmoduletiltdatatothePVmodel.The
modelusesthisinformationtopredictthe
I-Vcurveshapeatoperatingconditions,
andtotranslatethemeasuredcurvetoSTC.
SolSensorclampstothemoduleframe,
automaticallyorientingtheirradiance
sensorintheplaneofthearray.
Irradiance Accuracy
ThespectralresponseofSolSensor’ssilicon
photodiodesensoriscorrectedforthePV
technologyundertest.Specialfactorsare
providedformulti-andmono-crystalline
cellsaswellasCdTeandotherthinlm
technologies.Thesensoristemperature
compensatedandtheangularresponseofeachunit
iscalibratedforrotationandelevation.
Asaresultofthesefeatures,SolSensormakes
accurateirradiancemeasurementsoverabroadrange
oftechnologies,skyconditions,andsunangles,allowing
useoftheequipmentearlierandlaterintheday.
Temperature Accuracy
SolSensorprovidestwoexternalthermocoupleinputsfor
measuringmodulebacksideorambienttemperatures.
Celltemperaturecanalsobecalculateddirectlyfrom
themeasuredI-VcurveusingmethodsdescribedinIEC
60904-5.
ThePVA’sSmartTempfeatureblendsthesetwomethods
forbestadvantage.Temperatureiscalculatedfromthe
measuredI-Vcurveathighirradiance,takenfromthe
thermocoupleatlowirradiance,andderivedfromablend
ofthetwoatintermediateirradiancevalues.
Wireless Range
SolSensor’srangetoyourPCis100m,allowingyoutotest
moreofyourarraywitheachredeploymentofthesensors.
WhenthedistancefromyourPCtoSolSensorincreases
beyondthedirectwirelessrange,thePVA’smesh-type
wirelessnetworktransparentlyswitchestousethecurve
tracerasahighpowerrelaystation.
tension (Volts)
courant (Ampères)
6
5
4
3
2
1
0
0 10 20 30 40 50
Setup
1.Deploysensors
2.OpenDC
disconnect
3.Liftstringfuses
4.Cliptestleadsto
bussbars
Measurement
5.Insertafuse
6.MeasureI-Vcurve
7.Saveresult
8.Repeatfornext
string…