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IQ7/IQ7+/IQ7X/IQ7A Microinverters Installation and Operation Manual

IOM-00028-1.0

Contents

Important safety information .................................................................................................................... 5

Read this first .......................................................................................................................................... 5

Product labels ......................................................................................................................................... 5

Safety and advisory symbols ................................................................................................................ 5

PV Rapid Shutdown Equipment (PVRSE) ........................................................................................... 9

1 The Enphase IQ System................................................................................................................... 10

1.1 How the Enphase IQ Series Microinverters work ..................................................................... 11

System monitoring ........................................................................................................................................ 11

2 Planning for microinverter installation .......................................................................................... 12

2.1 Compatibility ................................................................................................................................ 12

2.2 Grounding considerations ..................................................................................................... 12

2.3 Branch circuit capacity .......................................................................................................... 13

2.4 Utility service requirements ................................................................................................... 13

2.5 Wire lengths and voltage rise ................................................................................................ 13

2.6 Lightning and surge suppression .......................................................................................... 14

2.7 Parts and tools required ......................................................................................................... 14

Enphase Equipment .............................................................................................................................. 14

Other Items............................................................................................................................................. 14

3 Enphase microinverter Installation ................................................................................................ 15

Step 1: Position the IQ Cable ................................................................................................................ 16

Step 2: Position the junction box ........................................................................................................ 17

Step 3: Mount the microinverters ....................................................................................................... 18

Step 4: Create an installation map ...................................................................................................... 19

Step 5: Manage the cabling ................................................................................................................ 20

Step 6: Connect the microinverters .................................................................................................. 20

Step 7: Terminate the unused end of the cable ................................................................................. 21

Step 8: Complete the installation of the junction box .................................................................... 22

Step 9: Connect the PV modules ....................................................................................................... 22

Step 10: Energize the system .............................................................................................................. 23

3.1 Set up and activate monitoring ................................................................................................. 23

4 Troubleshooting ............................................................................................................................... 24

4.1 Status LED indications and error reporting ............................................................................ 24

4.1.1 LED operation ............................................................................................................................... 24

4.1.2 DC Resistance Low – Power Off Condition ............................................................................. 24

4.1.3 Other faults ................................................................................................................................... 25

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enphase IQ7 - Table of Contents

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