enphase IQ8 Design Guide

IQ8 Commercial Microinverter grid-tied PV system
4 © 2023 Enphase Energy Inc. All rights reserved. November 2023
USG-00026-1.0
2.7.2 Installation Instructions ............................................................................................................... 28
2.8 Surge suppression in commercial systems .......................................................................... 28
3 IQ8 Commercial System layout design ......................................................................................... 29
3.1 PV array layout design ........................................................................................................... 29
3.1.1 Information required for array design ....................................................................................... 29
3.1.2 Design considerations for PV array layout ................................................................................ 29
3.2 AC cabling layout .................................................................................................................... 29
3.3 PV load center configuration and location ........................................................................... 30
3.3.1 Key components of PV load Center ........................................................................................... 30
3.3.2 Location of PV load center ........................................................................................................... 31
3.4 Consumption CTs ..................................................................................................................... 31
4 IQ8 Commercial Microinverter installation .................................................................................. 32
4.1 Parts and tools required ......................................................................................................... 32
4.2 IQ8 Commercial Microinverter installation .......................................................................... 33
5 IQ8 Commercial System startup and commissioning ................................................................ 42
5.1 Startup and commissioning using the Enphase Installer App .......................................... 42
5.1.1 System activation using the Enphase Installer Portal .............................................................. 43
5.1.2 Array Builder using Enphase Installer Portal............................................................................. 44
5.1.3 IQ8 Commercial System commissioning process ................................................................... 44
6 IQ8 Commercial System monitoring and maintenance .............................................................. 51
6.1 System details .......................................................................................................................... 51
6.1.1 Kiosk view ....................................................................................................................................... 51
6.1.2 Energy and power data ................................................................................................................. 51
6.2 Array details ............................................................................................................................ 54
6.3 Troubleshooting using Enphase Installer Portal and Enphase Installer App ................. 57
6.3.1 Identifying crosstalking microinverters in the array ................................................................57
6.3.2 Powerline communication analysis FFT scan ........................................................................... 58
6.3.3 Initiate RMA in Enphase Installer Portal ..................................................................................... 59
7 Troubleshooting of IQ8 Commercial Microinverter ...................................................................... 60
7.1 LED Operation ......................................................................................................................... 60
7.2 DC Resistance Low—Power Off condition .......................................................................... 60
7.2.1 Method 1: Clear the error using the Enphase Installer Portal ................................................. 61
7.2.2 Method 2: Use the Enphase Installer App to clear the condition ............................................ 61
7.3 Troubleshoot an inoperable microinverter ........................................................................... 61
7.4 Disconnect a microinverter .................................................................................................. 62
7.5 Install a replacement microinverter ..................................................................................... 63
8 Appendix A: Ampacity calculations for IQ8 Commercial Microinverter system ..................... 64

enphase IQ8 Specifications

General

Model	IQ8
Manufacturer	Enphase Energy
Efficiency	97.5%
Cooling	Natural convection
Warranty	25 years
Weight	2.2 lbs
AC Voltage	240 V
Frequency Range	60 Hz
Operating Temperature Range	-40°C to +60°C