IQ8MC/IQ8AC/IQ8HC Microinverters Installation and Operation Manual
21 © 2023 Enphase Energy Inc. All rights reserved. October 2023
USM-00008-1.0
Step 8: Complete the installation of the junction box
A. Connect the IQ Cable to the junction box.
B. Refer to the wiring diagrams on page 39 for more information. Wire colors are listed in the following table.
Step 9: Connect the PV modules
WARNING: Electrical shock hazard. The DC conductors of this photovoltaic system are ungrounded and may
be energized.
A. If required, attach the Enphase DC bulkhead adaptors to the
microinverters. Ensure they are fully seated. Do not reverse the adaptor
connections.
B. Connect the DC leads of each PV module to the DC input connectors of
the corresponding microinverter.
C. Check the LED on the connector side of the microinverter.
The LED flashes green six times when DC power is applied.
D. Mount the PV modules above the microinverters.
Step 10: Enphase Energy System configurations
Following are common system configurations possible with Enphase Energy System using IQ8 PV (IQ8MC/IQ8AC
/IQ8HC) Microinverters.
− PV solar grid-tied
− PV solar grid-agnostic
− PV solar + storage
− PV solar + generator
− PV solar + storage + generator
Based on the system configuration, Enphase Energy System technology systems include the following Enphase
products:
• IQ Battery system is an all-in-one AC coupled storage system that includes embedded, grid-forming multimode
microinverters. You can connect multiple IQ Battery systems to maximize potential backup for homes. The IQ
Battery 3 storage system provides flexibility to customers to start small and add capacity incrementally. IQ Battery
systems cannot be used with grid voltages of 208 volts or three-phase services.
• IQ System Controller : The Enphase Energy System includes the IQ System Controller with microgrid
interconnection device (MID) capability, which consolidates interconnection equipment into a single enclosure and
streamlines grid-independent capabilities of PV and storage installations by providing a consistent, pre-wired
solution for residential applications. Along with MID functions, it includes PV, storage, and generator input circuits.
It allows IQ Battery storage systems to form an intentional island (per IEEE 1547.4 definition) and contains a neutral-
forming transformer (NFT) to enable 120/240 V operation in backup mode.
• Wireless communications kit enables direct communication between the IQ Battery, IQ System Controller, and the
Gateway using a 2.4 GHz frequency. The kit is connected to one of the USB ports on the IQ Gateway.
• Mobile Connect cellular modem is required unless already present to ensure the best performance of your system.
The cellular modem connects to a USB port on the IQ Gateway.
• For new or retrofit systems with IQ Series solar microinverters:
o IQ8 PV (IQ8MC/IQ8AC/IQ8HC) Series Microinverters and accessories. Enphase Energy System
technology is fully compatible with IQ8 Series Microinverters.
Wire colors
L1-Black L2-Red
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