Technical Data; Technical Considerations; Compliance Data; Anti-Islanding Function - enphase IQ7+ Installation And Operation Manual

Technical data

Technical considerations

Be sure to apply the following when installing the Enphase IQ Series Microinverter:
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 labelled "PV wire" or "PV cable" to comply with the 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 depend on the quantity, size, and temperature of the PV
cells, as well as the insolation of each cell. The highest PV module output voltage occurs when the
temperature of the cells is the lowest, and the PV module is in an open circuit (not operating).

Compliance data

Anti-islanding function

Enphase IQ7 Series Microinverters use the following anti-islanding functions:
•
Rate of change of frequency (RoCoF)
•
Vector Shift
•
Harmonic injection (soon to be replaced by VAR injection)

PQ capability curve

If needed, Enphase IQ7 Series Microinverters can absorb or inject reactive power, provided that current and
voltage ratings are not exceeded. The following figure shows the active power (P) capabilities curve relative
to reactive power (Q) related to the power rating in the operating voltage range for the Enphase IQ7 Series.
•
Maximum power factor (pf) adjustability = -0.8 to 0.8
•
Reactive power capability = ± 50% (over/under excited) provision or absorption of reactive energy
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IQ7+ and IQ7A Installation and Operation Manual - India
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