Technical Data; Technical Considerations; Compliance Data; Anti-Islanding - enphase IQ 7 Installation And Operation Manual

Technical Data

Technical Considerations

Be sure to apply the following when installing the Enphase IQ-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).

Compliance Data

Anti-Islanding

Enphase IQ 7 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 IQ 7 Series Microinverters have the capability to absorb or inject reactive power,
provided that current and voltage ratings are not exceeded. Below is an active power (P) capabilities
curve relative to reactive power (Q) related to the power rating in the operating voltage range for
Enphase IQ 7 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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IQ 7 / IQ 7+ / IQ 7X / IQ 7A Installation and Operation
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