IQ8 Commercial Microinverter grid-tied PV system
33 © 2023 Enphase Energy Inc. All rights reserved. November 2023
USG-00026-1.0
4.2 IQ8 Commercial Microinverter installation
Installing the Enphase IQ8 Commercial Microinverters involves several key steps.
1. Position the Enphase QD Cable.
2. Manage the cabling.
3. Mount the microinverters.
4. Connect the microinverters.
5. Provide an AC connection to the branch circuit.
6. Terminate the unused end of the cable.
7. Create an installation map.
8. Connect the series-connected PV modules.
9. Energize the system.
Step 1: Position the Enphase QD Cable
A. Plan each cable segment to allow connectors on the QD Cable to align with each IQ8
Commercial Microinverter connected to the PV module. Allow extra length for slack, cable
turns, and any obstructions.
B. Mark the approximate location of the microinverter on each PV module or the PV racking.
C. Lay out the cabling along the installed racking for the AC branch circuit.
D. Cut each segment of cable to meet your planned needs.
When transitioning between rows, secure the cable to the rail or PV module frame to prevent
cable damage or connector damage. Do not count on the connector to withstand tension.
Step 2: Manage the cabling
A. You must install supports (clips, etc.) for the QD Cable and Raw QD Cable at 1.8 m (6 ft)
intervals or less.
B. Installation requirements for wet-rated cable allow QD Cable and Raw QD Cable to be
installed in conduits, cable trays, and other raceways.
C. Dress any excess cabling in loops so that it does not touch the roof. Do not form loops smaller
than 12 cm (4.7”) in diameter.
Step 3: Mount the microinverters
A. Mount the microinverter horizontally, bracket side up, or vertically. Always place it under the
PV module, protected from direct exposure to rain, sun, and other harmful weather events.
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