IQ8MC/IQ8AC/IQ8HC Microinverters Installation and Operation Manual
3 © 2023 Enphase Energy Inc. All rights reserved. October 2023
USM-00008-1.0
Contents
Important safety information ...........................................................................................................................5
Read this first ..................................................................................................................................................5
Product labels.................................................................................................................................................5
Safety and advisory symbols .......................................................................................................................5
IQ8 Series Microinverters safety instruction .............................................................................................5
PV rapid shutdown equipment (PVRSE) .....................................................................................................9
Anti-islanding methodology ........................................................................................................................9
The Enphase IQ System ................................................................................................................................... 10
How the Enphase IQ8 Series Microinverters work ................................................................................... 11
System monitoring ........................................................................................................................................ 11
Optimal reliability .......................................................................................................................................... 11
Ease of design ................................................................................................................................................ 11
Planning for microinverter installation ......................................................................................................... 12
Compatibility ................................................................................................................................................ 12
Grounding considerations .......................................................................................................................... 12
Branch circuit capacity ............................................................................................................................... 13
Utility service requirements ....................................................................................................................... 13
Wire lengths and voltage rise..................................................................................................................... 13
Lightning and surge suppression .............................................................................................................. 14
Parts and tools required ................................................................................................................................. 15
Enphase equipment ..................................................................................................................................... 15
Other items ................................................................................................................................................... 15
Enphase microinverters installation ............................................................................................................. 16
Step 1: Position the IQ Cable ...................................................................................................................... 17
Step 2: Position the junction box ............................................................................................................... 17
Step 3: Mount the microinverters .............................................................................................................. 17
Step 4: Create an installation map ............................................................................................................. 18
Step 5: Manage the cabling ........................................................................................................................ 19
Step 6: Connect the microinverters .......................................................................................................... 19
Step 7: Terminate the unused end of the cable ...................................................................................... 20
Step 8: Complete the installation of the junction box ............................................................................ 21
Step 9: Connect the PV modules ............................................................................................................... 21
Step 10: Enphase Energy System configurations .................................................................................... 21
Troubleshooting .............................................................................................................................................. 26
Status LED indications and error reporting ............................................................................................ 26
LED operation .......................................................................................................................................... 26
DC Resistance Low – Power Off condition.......................................................................................... 26
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