Technical Data; Technical Considerations; Module Requirements; Bifacial Modules - enphase IQ 7+ Installation And Operation Manual

Technical Data

Technical Considerations

Module Requirements

Be sure to apply the following when installing the Enphase IQ 7 Series Micro System:
WARNING: Risk of equipment damage. You must match the DC operating voltage range
of the PV module with the allowable input voltage range of the Enphase Microinverter.
WARNING: Risk of equipment damage. The maximum open circuit voltage of the PV
module must not exceed the specified maximum input voltage of the Enphase
Microinverter.
•
PV modules must have conductors labeled "PV Wire" or "PV Cable" to comply with NEC for
Ungrounded PV Power Systems.
•
Verify that the voltage and current specifications of the PV module match those of the
microinverter.
•
The maximum short circuit current rating of the PV module must be equal to or less than the
maximum input DC short circuit current rating of the microinverter.
The output voltage and current of the PV module depends on the quantity, size and temperature of the
PV cells, as well as the insolation on each cell. The highest PV module output voltage occurs when the
temperature of the cells is the lowest and the PV module is at open circuit (not operating).

Bifacial Modules

Enphase microinverters are compatible with bifacial PV modules. Bifacial solar modules produce power
from both sides of a bifacial module, increasing total energy generation. The power gained from rear side
(bifacial gain) is highly influenced by various design factors such as albedo, module elevation, pitch,
temperature and shading. The bifacial gain can be anywhere between 0% to 30% of nominal rating (front
side power rating) of the module. Since the bifacial gain is highly influenced by various design
considerations, pairing the bifacial module with right microinverter depends on the electrical
characteristics of a given module.
The temperature adjusted electrical parameters (maximum power, voltage and current) of the bifacial
modules, considering the front side electrical parameters (i.e., 0% back side gain), must be within the
microinverter input parameters range.
See Step 3: Mount the Microinverters on page 15 for tips on vertical mounting of bifacial modules.
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IQ 7 / IQ 7+ / IQ 7X / IQ 7A Micro Installation and Operation
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