enphase IQ8MC Installation And Operation Manual
Microinverters
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Summary of Contents for enphase IQ8MC
- Page 1 INSTALLATION AND OPERATION MANUAL IQ8MC/IQ8AC/IQ8HC Microinverters © 2023 Enphase Energy Inc. All rights reserved. October 2023 USM-00008-1.0...
- Page 2 For warranty text refer to enphase.com/warranty. For Enphase patent information refer to enphase.com/company/patents. © 2023 Enphase Energy. All rights reserved. Enphase, the e and CC logos, IQ, and certain other marks listed at https://enphase.com/trademark-usage-guidelines are trademarks of Enphase Energy, Inc. in the US and other countries.
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Page 3: Table Of Contents
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 ...................... - Page 4 Troubleshoot an inoperable microinverter ....................27 Disconnect a microinverter ........................28 Install a replacement microinverter ......................28 Enphase IQ Cable planning and ordering ....................29 Connector spacing options ........................30 IQ Cable options ............................30 Enphase IQ Cable accessories ........................30 Technical considerations ...........................
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Page 5: Important Safety Information
DANGER: Risk of Only use electrical system components approved for wet locations. electric shock. Only qualified personnel should install, troubleshoot, or replace Enphase Risk of fire. microinverters or IQ Cable and accessories. Ensure that all AC and DC wiring is correct and that none of the AC or DC cables are pinched, shorted, or damaged. - Page 6 IQ8MC/IQ8AC/IQ8HC Microinverters Installation and Operation Manual DANGER: Risk of Do not use Enphase equipment in a manner not specified by the manufacturer. Doing electric shock. so may cause death or injury to persons or damage to equipment. Be aware that installation of this equipment includes the risk of electric shock.
- Page 7 IQ8MC/IQ8AC/IQ8HC Microinverters Installation and Operation Manual WARNING: Risk of The Enphase microinverter is not protected from damage due to moisture trapped in equipment cabling systems. Never mate microinverters to cables that have been left disconnected damage. and exposed to wet conditions. This voids the Enphase warranty.
- Page 8 Avoid cable contacting rough surfaces or moving parts within the racking system. • Avoid overly tight bending radii. The minimum bend radii for the DC cable is 8 X cable outer diameter. • Avoid overly tight-sized cable clips for routing. © 2023 Enphase Energy Inc. All rights reserved. October 2023 USM-00008-1.0...
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Page 9: Pv Rapid Shutdown Equipment (Pvrse)
(3/8 in) in white on a red background. Anti-islanding methodology The anti-islanding methodology used by Enphase IQ8 Series Microinverters is listed by UL and tested in accordance with IEEE1547-2018 and UL1741-SB. IQ8 Series Microinverter uses the Group 1 method of anti-islanding... -
Page 10: The Enphase Iq System
AC power lines and transmits the data to the Enphase App through a broadband or cellular connection. The IQ Gateway is capable of monitoring up to 600 Enphase IQ Microinverters and up to 39 IQ Batteries. For details, refer to the IQ Gateway Installation and Operations Manual. -
Page 11: How The Enphase Iq8 Series Microinverters Work
Microinverter systems are inherently more reliable than conventional string inverters. The distributed nature of a microinverter system ensures that there is no single point of system failure in the PV system. Enphase microinverters are designed to operate at full power at ambient temperatures as high as 65°C (149°F). -
Page 12: Planning For Microinverter Installation
IQ8HC-72-M-US https://enphase.com/installers/microinverters/calculator. NOTE: Some Enphase microinverters will not begin exporting power until the IQ Gateway is installed and has detected all the microinverters at the site. In addition, the grid profile needs to be configured, and the IQ Gateway must have propagated these settings to the microinverters. For instructions on this procedure, refer to the IQ Gateway quick install guide at https://enphase.com/installers/resources/documentation. -
Page 13: Branch Circuit Capacity
AC branch circuit to the breaker in the load center. Enphase recommends a voltage rise total of less than 2% for the sections from the microinverter AC branch circuit to the breaker in the load center. -
Page 14: Lightning And Surge Suppression
For this reason, Enphase recommends that you protect your system with a lightning and surge suppression device. In addition to having some level of surge suppression, it is also important to have insurance that protects against lightning and electrical surges. -
Page 15: Parts And Tools Required
240-2, X2-IQ-AM1-240-4C, X2-IQ-AM1-240-4, X-IQ-AM1-240-4C, X-IQ-AM1-240-4). • Enphase Installer App: Download the Enphase Installer App, open it, and log in to your Enphase Installer Platform account. Use it later to scan microinverter serial numbers and connect to the IQ Gateway to track system installation progress. -
Page 16: Enphase Microinverters Installation
Step 7: Terminate the unused end of the cable Step 8: Complete the installation of the junction box Step 9: Connect the PV modules Step 10 : Energize the system Horizontal mount Vertical mount © 2023 Enphase Energy Inc. All rights reserved. October 2023 USM-00008-1.0... -
Page 17: Step 1: Position The Iq Cable
8 mm (5/16 in) mounting hardware: 9 N m (80 in-lbs. to 85 in-lbs.) • When using UL 2703 mounting hardware, use the manufacturer’s recommended torque value. Horizontal mount © 2023 Enphase Energy Inc. All rights reserved. October 2023 USM-00008-1.0... -
Page 18: Step 4: Create An Installation Map
Step 4: Create an installation map The Enphase installation map is a diagram of the physical location of each microinverter in your PV array. Copy or use the blank map on page 38 to record microinverter placement for the system, or provide your own layout if you require a larger or more detailed installation map. -
Page 19: Step 5: Manage The Cabling
Connect the microinverter. Listen for a click as the connectors engage. Cover any unused connector on the IQ Cable with the IQ Sealing Cap. Listen for a click as the connectors engage. © 2023 Enphase Energy Inc. All rights reserved. October 2023 USM-00008-1.0... -
Page 20: Step 7: Terminate The Unused End Of The Cable
NOTE: Turn only the hex nut to prevent conductors from twisting out of the separator. WARNING: The IQ Terminator cannot be re-used. If you unscrew the nut, you must discard the IQ Terminator. © 2023 Enphase Energy Inc. All rights reserved. October 2023 USM-00008-1.0... -
Page 21: Step 8: Complete The Installation Of The Junction Box
The LED flashes green six times when DC power is applied. Status LED 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 −... - Page 22 Batteries, and the IQ System Controller smart switch. It collects system performance information and transmits that information over the internet to Enphase Cloud. An IQ Gateway is required for Enphase Energy Systems with IQ Series Microinverters. The IQ Gateway is included in an IQ Combiner.
- Page 23 In the PV Solar grid-agnostic configuration in Enphase Energy System, IQ System Controller is installed on the line side of the main load panels. This allows a properly sized Enphase Energy System to provide power to all loads in the main load panel in the event of a grid outage and PV solar presence.
- Page 24 In the whole home (main load panel) backup configuration, the IQ System Controller is installed on the line side of the main load panels rated up to 200 A. This allows a properly sized Enphase Energy System to provide power to all loads in the main load panel in the event of a grid outage.
- Page 25 You can set the grid profile through the Enphase Installer Platform, during system registration, or through the Enphase Installer App at any time. You must have an IQ Gateway to set or change the grid profile. © 2023 Enphase Energy Inc. All rights reserved.
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Page 26: Troubleshooting
Follow all the safety measures described in this manual. Qualified personnel can use the following troubleshooting steps if the PV system does not operate correctly. WARNING: Risk of electric shock. Do not attempt to repair the Enphase microinverter; it contains no user-serviceable parts. If it fails, contact... -
Page 27: Other Faults
DC or AC connectors under load. WARNING: The Enphase microinverters are powered by DC power from the PV modules. Disconnect the DC connections and reconnect the DC power, and then watch for the solid green light for about six seconds after connection to DC power. -
Page 28: Disconnect A Microinverter
Connect a clamp meter to one of the conductors of the DC cables from the PV module to measure the microinverter current. This will be under 1 A if the AC is disconnected. Verify the PV module DC voltage is within the allowable range shown in “Specifications”. Refer to the Enphase compatibility calculator at: https://enphase.com/installers/microinverters/calculator... -
Page 29: Enphase Iq Cable Planning And Ordering
Energize the AC branch circuit breaker and verify the operation of the replacement microinverter by checking the status LED on the connector side of the microinverter. Use the Enphase Installer App to retire the old microinverter serial number from the IQ Gateway database. In the Enphase Installer App, after connected to the IQ Gateway: Tap Devices &... -
Page 30: Connector Spacing Options
WARNING: Risk of equipment damage. The maximum open circuit voltage of the PV module must not exceed the specified maximum input voltage of the Enphase microinverter. • PV modules must have conductors labeled “PV Wire” or “PV Cable” to comply with NEC for ungrounded PV power systems. -
Page 31: Bifacial Modules
PV module is at an open circuit (not operating). Bifacial modules Enphase IQ8 Series Microinverters are compatible with bifacial PV modules if the temperature-adjusted electrical parameters (maximum power, voltage, and current) of the modules, considering the electrical parameters, including the bifacial gain, are within the allowable microinverter input parameters range. -
Page 32: Specifications
208 VAC single-phase (L-L), 120° Minimum and Maximum grid voltage 240 VAC 208 VAC Max continuous output current 1.33 240 VAC 208 VAC 1.49 Nominal frequency Extended frequency range © 2023 Enphase Energy Inc. All rights reserved. October 2023 USM-00008-1.0... - Page 33 PV systems for AC and DC conductors, when installed according to manufacturer’s instructions. 1. No enforced DC/AC ratio. See the compatibility calculator at https://enphase.com/installers/microinverters/calculator. 2. The nominal voltage range can be extended beyond nominal if required by the utility.
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Page 34: Iq8Ac-72-M-Us Microinverter Specifications
AC short circuit fault current over 3 cycles Arms 2.70 Maximum microinverters per 20 A (max) AC branch circuit 240 VAC 208 VAC Total harmonic distortion <5 Overvoltage class AC port © 2023 Enphase Energy Inc. All rights reserved. October 2023 USM-00008-1.0... - Page 35 PV systems for AC and DC conductors, when installed according to manufacturer’s instructions. 1. No enforced DC/AC ratio. See the compatibility calculator at https://enphase.com/installers/microinverters/calculator. 2. The nominal voltage range can be extended beyond nominal if required by the utility.
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Page 36: Iq8Hc-72-M-Us Microinverter Specifications
AC short circuit fault current over 3 cycles Arms 2.70 Maximum microinverters per 20 A (max) AC branch circuit 240 VAC 208 VAC Total harmonic distortion <5 Overvoltage class AC port AC port back feed current © 2023 Enphase Energy Inc. All rights reserved. October 2023 USM-00008-1.0... - Page 37 PV systems, for AC and DC conductors, when installed according to manufacturer’s instructions. 1. No enforced DC/AC ratio. See the compatibility calculator at https://enphase.com/installers/microinverters/calculator. 2. The nominal voltage range can be extended beyond nominal if required by the utility.
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Page 38: Iq Cable Specifications
Enphase connector ratings Enphase connectors on the cable assemblies in the following table have a maximum current of 20 A, a maximum OCPD of 20 A, and a maximum ambient temperature of -40°C to 79°C (-40°C to 174.2°F) and are rated for disconnection under load. -
Page 39: Enphase Installation Map
IQ8MC/IQ8AC/IQ8HC Microinverters Installation and Operation Manual Enphase installation map © 2023 Enphase Energy Inc. All rights reserved. October 2023 USM-00008-1.0... -
Page 40: Sample Wiring Diagram (Grid Tied System)
IQ8MC/IQ8AC/IQ8HC Microinverters Installation and Operation Manual Sample wiring diagram (grid-tied system) © 2023 Enphase Energy Inc. All rights reserved. October 2023 USM-00008-1.0... -
Page 41: Revision History
USM-00008-1.0 October 2023 Initial release © 2023 Enphase Energy. All rights reserved. Enphase, the e and CC logos, IQ, and certain other marks listed at https://enphase.com/trademark-usage-guidelines are trademarks of Enphase Energy, Inc. in the US and other countries. Data subject to change.
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