Specifications

InstallationandOperationManual(REVH) PVI6500/PVI7500
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7TechnicalData
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7.1TechnicalInformationandspecifications
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Input(DC)fromPVarray:
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 MaximumopencircuitvoltageofPVarray:600VDC
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WARNING:Local codes must be followed to calculate the maximum number of PV modules allowed for a
maximum inverter open circuit voltage (OCV) of 600V DC in extreme cold temperatures for the installation
location.
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Theopen circuitvoltage of PVmodules depends onthe cell temperature and the solar irradiation.Thehighest
open circuit voltage occurs when the PV modules are at the coldest temperature and in bright sun.(See the
followingfigure–Fig.7.5)
Fig.7.1.1Examplerepresentative~100WPVmodulevoltage–
currentcharacteristicatvariouscelltemperatures
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Because PVmodules also have a reduction involtage athigh cell temperatures,you must make suretheMPP voltageof the
stringswillnotdropbelowtheminimuminverterDCinputvoltageof230VDCinveryhottemperatureconditions,includingwire
lossesandvoltagedropinorder
toavoidreducedsystemperformance.
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Boththemaximum opencircuitvoltage(OCV)whenat coldextremeandminimumMPPvoltagewhenathot extremecan be
calculatedforaPVmoduleusingitsspecificationsheet.SolectriaRenewables’onlinePVmodulestringsizingtoolcanthenbe
usedtodeterminehowmany
modulescanbeusedinastring.
0
2
4
6
8
0 102030
DC Current (A)
Voltage (VDC)
at 50 deg C
at 20 deg C
at -20 deg C