User Manual
Planning for a Three-Phase IQ Microinverter System – North America
© 2017 Enphase Energy Inc. All rights reserved. September 20, 2017
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IQ Envoy
When designing a three-phase, commercial scale system, it is critical to install the IQ Envoy (model ENV-IQ-
AM1-240 M). The IQ Envoy communicates with up to 600 IQ Series Microinverters in a single-phase or
three-phase applications. Do not install an IQ Combiner Box; it is only for single-phase applications.
Wiring the IQ Envoy for Three-Phase Applications
The production and consumption CTs are not currently supported for three-phase applications, so should not
be installed and should not be enabled. The IQ Microinverter system does not use a neutral, and a neutral is
not required on the roof. However, a neutral is required for operation of the IQ Envoy. In addition, two hot
conductors from any two of the three-phases must be terminated at the IQ Envoy for communicating with the
microinverters.
The diagram below shows how to properly wire an Envoy into a three-phase system.
Q Cable and IQ Microinverter Accessories
The IQ Microinverter system uses a new and improved cabling system. Q Cable is lighter than previous
generation cabling systems and easier to manage, thus driving down overall system costs. Q Cable is a
purpose built single-phase cable containing two 12 AWG conductors with integrated AC connectors. You can
use the cable in single-phase or three-phase applications. The Q Cable male connectors plug directly into
the IQ Microinverters, whose double insulated rating requires no neutral or ground conductors.