11.1.3. Sequence 3: Control wiring between four IQ Battery 10C, IQ Combiner 6C, and IQ Meter Collar 11.1.4. Sequence 4: Control wiring between four IQ Battery 10C, IQ Combiner 6C without the IQ Meter Collar 11.1.5. Sequence 5: Control wiring between four IQ Battery 10C units using one header in IQ Combiner 6C 11.2. Consumption CT wiring...
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16.1.2. Scenario 2: IQ Combiner 6C installed in a readily accessible area 16.1.3. Scenario 3: IQ Combiner 6C and IQ Battery are installed in an area that is not readily accessible 16.1.4. Scenario 4: Backfed panel installed in a readily accessible area outdoors 16.2.
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Contents 18. Energizing the IQ Combiner 6C 19. Site commissioning 20. Safety information 20.1. Safety and advisory symbols 20.2. Safety instructions 20.3. FCC statement 21. Appendix A: 3-Pole disconnect models 22. Appendix B: 2-Pole disconnect models 23. Appendix C: Legends...
1. Introduction The IQ Combiner 6C consolidates interconnection equipment into a single enclosure, simplifying the installation of Enphase Energy Systems. It integrates the IQ Gateway installation by providing a consistent, pre-wired solution for residential applications. This all-in-one solution includes breaker spaces for photovoltaic (PV) systems, batteries, EV chargers, and load controllers, along with integrated current transformers (CTs) for solar and battery metering.
This configuration requires the installation of Consumption CTs for home energy monitoring in the absence of an IQ Meter Collar. The IQ Combiner 6C includes an integrated load controller with built-in CTs, which can be used to connect loads removed from the back-fed panel, main panel, or any additional loads.
NOTE: The configuration requires utility authorization for installation of IQ Meter Collar behind the utility meter. The IQ Combiner 6C includes an integrated load controller with built-in CTs, which can be used to connect additional loads removed from the back-fed panel or main panel.
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NOTE: The configuration does not require utility authorization for installation of IQ Meter Collar on a discrete Form 2S meter pan. The IQ Combiner 6C includes an integrated load controller with built-in CTs, which can be used to connect additional loads removed from the back-fed panel or main panel.
System configurations 2.3 Diagrams Figure 1: Grid-tied, Solar only (without IQ Meter Collar) NOTE: For notations, refer to Legends in the Appendix section.
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System configurations Figure 2: Grid-tied, Battery only (without IQ Meter Collar) NOTE: For notations, refer to Legends in the Appendix section.
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System configurations Figure 3: Grid-tied, Solar + Battery (without IQ Meter Collar) NOTE: For notations, refer to Legends in the Appendix section.
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System configurations Figure 4: Grid-tied, Solar + Battery + legacy microinverters/third-party PV (without IQ Meter Collar) NOTE: For notations, refer to Legends in the Appendix section.
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System configurations Figure 5: Grid-tied, Solar only (with IQ Meter Collar behind the utility meter) NOTE: For notations, refer to Legends in the Appendix section.
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System configurations Figure 6: Grid-tied, Solar + legacy microinverters/third-party PV (with IQ Meter Collar behind the utility meter) NOTE: For notations, refer to Legends in the Appendix section.
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System configurations Figure 7: Grid-forming, Whole Home backup (with IQ Meter Collar behind the utility meter) NOTE: For notations, refer to Legends in the Appendix section.
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System configurations Figure 8: Grid-forming, Whole Home backup + legacy microinverters/third-party PV (with IQ Meter Collar behind the utility meter) NOTE: For notations, refer to Legends in the Appendix section.
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System configurations Figure 9: Grid-forming, Whole Home backup (IQ Meter Collar in a discrete meter pan) NOTE: For notations, refer to Legends in the Appendix section.
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System configurations Figure 10: Grid-forming, Partial Home backup (IQ Meter Collar in a discrete meter pan) NOTE: For notations, refer to Legends in the Appendix section.
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System configurations Figure 11: Grid-forming, Partial Home backup + legacy microinverters/third-party PV (IQ Meter Collar in a discrete meter pan) NOTE: For notations, refer to Legends in the Appendix section.
Torque wrench integrated load controller) Gloves (15-50) lb-in Copper conductors: 12-2/0 (rated at Lag bolts or other screw types with a 90°C) washer to install the wall bracket on the Safety Disconnect Enphase SKU for control cable: wall (Optional) CTRL-SC3-NA-01...
For indoor installation, ensure clearance of 6" from the ground. • The IQ Combiner 6C features active cooling with vents, it is recommended to maintain a 6-inch distance from the nearest side wall to enhance thermal regulation and facilitate fan filter servicing.
Mounting 6 " 6 " 6 " 36 " 6 " for indoor installation 36 " for outdoor installation NOTE: Conduits may be placed within the 6-inch clearance zone along the sides and bottom of the enclosure, as long as they do not block the airflow of the fan with the filter.
Mounting 5.4 Detaching the door Follow these steps: Open the door latch. Open the door between 90° and 120° while facing the enclosure. Slide up the door for removal. Set the door aside to be reattached later. Open the door latch Open the door between 90°...
Mounting Unfasten the three fasteners Unplug the Mobile Connect USB holding the dead front Mobile Connect Gently lift and angle the top section Enclosure without dead front away from the enclosure to detach it 5.6 Install on the wall Follow these steps: Position the unit on the wall so that the mounting holes in the center of the tabs align with the center of the stud.
Mounting 6. Internal view 2 x IQ Battery breaker spaces 4 x IQ PV breaker spaces 1 x IQ EV Charger breaker space 1 x PV aggregate (PVA) breaker, Pre-installed 1 x load controller breaker space Status LED and reset button Mobile Connect...
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NOTE: PV/Battery/EVSE breaker shown for demonstration purposes only, install as needed. NOTE: IQ Combiner 6C is shipped with a 60 A PVA breaker preinstalled to support 3 × 20 A PV branch circuits. For more than 3x 20 A PV branch circuits, upsize the...
7. Upper-side conduit (pre-drilled) The IQ Combiner 6C has two pre-drilled conduit locations on the upper-side of the enclosure, covered with a plastic cover and rubber plug. The pre-installed conduit plate can be used to attach the conduit with a locknut for a complete installation. The metal conduit plate beneath the plastic cover can be replaced with conduit plates from the accessory kit.
9. Wiring sequence After drilling the conduit or planning the wiring with pre-drilled upper-side conduit, ensure a seamless installation of the IQ Combiner 6C by following the wiring sequence. This will prevent wiring overlaps and maintain access to connectors, lugs, and terminals.
Wiring sequence • Connect PV disconnect and grid side disconnect (if required). Refer to section Disconnects and the Rapid Shutdown initiator for more details. 10. Ride Through Power supply board A Ride Through Power supply board (RT-PSB) with capacitors may be required in solar-only systems if the utility mandates the IEEE 2030.5 connection to be powered during low-voltage ride-through.
Ride Through Power supply board • Ensure the space is clear and ready for the installation of the Ride-through Power Supply accessory. Follow the steps to disassemble the load controller. Unplug the load controller relay connector and load controller CT connector. Remove the plastic cover that is snapped onto the enclosure to access the terminals connecting the integrated load controller to the DER bus.
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Ride Through Power supply board NOTE: The power supply accessory can only be installed if the integrated load controller is not mounted.
Cu: 16-12 AWG 11.1 Control wiring • The IQ Combiner 6C, along with the IQ Battery and IQ Meter Collar, requires control connections between the devices to operate correctly. This is done using the Enphase Control Cable (SKU: CTRL-SC3-NA-01). •...
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Refer to the connector connections label available on the product for easy reference. • The control wiring length from the IQ Combiner 6C to the IQ Battery or the IQ Meter Collar must not exceed 250 feet in either case to ensure the system operates according to specifications.
NOTE: Make sure to terminate the IQ Battery control header 2 in this sequence. NOTE: The control wiring length from the IQ Combiner 6C to the IQ Battery or the IQ Meter Collar must not exceed 250 feet in either case to ensure the system operates according to specifications.
NOTE: Make sure to terminate the IQ Battery control header 2 in this sequence. NOTE: The control wiring length from the IQ Combiner 6C to the IQ Battery or the IQ Meter Collar must not exceed 250 feet in either case to ensure the system operates according to specifications NOTE: The drain wire should only be terminated on one end of the control wiring between system components.
Gateway and combiner controller board connections NOTE: The control wiring length from the IQ Combiner 6C to the IQ Battery or the IQ Meter Collar must not exceed 250 feet in either case to ensure the system operates according to specifications NOTE: The drain wire should only be terminated on one end of the control wiring between system components.
NOTE: The sequence can be adjusted to accommodate more than four or fewer than four units of IQ Battery. NOTE: The control wiring length from the IQ Combiner 6C to the IQ Battery or the IQ Meter Collar must not exceed 250 feet in either case to ensure the system operates according to specifications NOTE: The drain wire should only be terminated on one end of the control wiring between system components.
NOTE: The sequence can be used without IQ Meter Collar as well. Make sure to terminate the IQ Meter Collar control header, if the IQ Meter Collar is not included in the system. NOTE: The control wiring length from the IQ Combiner 6C to the IQ Battery or the IQ Meter Collar must not exceed 250 feet in either case to ensure the system operates according to specifications NOTE: The drain wire should only be terminated on one end of the control wiring between system components.
Gateway and combiner controller board connections Configuration System type Need Consumption CT wiring Methods of Consumption CT wiring Grid-forming, Whole Home backup (with IQ Meter Collar behind the utility meter behind the Not required Not required utility meter) Grid-forming, Whole Home backup + legacy microinverters/third-party PV (with IQ Meter Collar Not required Not required...
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Gateway and combiner controller board connections...
Gateway and combiner controller board connections 11.2.2 Wire Consumption CTs - Method 2 - Parallel Consumption CTs with load controller CTs on the same header • Make sure the main panel remains de-energized until the CT wires are securely connected. •...
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Gateway and combiner controller board connections...
Gateway and combiner controller board connections 11.3 IQ Gateway connections Following connections are available on Gateway, open the lid for accessing these connections. Do not use (used internally for PV Production CT) Do not use Do not use (used internally for battery CT) Do not use (used internally for battery CT) IQ EV Charger CT connection Digital I/O for demand response functionality...
48 A, make sure to upsize the PVA breaker accordingly. • The PV aggregate breaker can be used as a PV disconnecting means. If IQ Combiner 6C is installed at a readily accessible outdoor location, the PV aggregate breaker can be the Rapid Shutdown initiator. Refer to Disconnects and Rapid Shutdown initiator configurations for more details.
Connect the ground (green or green/yellow) to the ground bar. • IQ EV Charger breaker must be installed on designated breaker spaces in the IQ Combiner 6C. • The unit is pre-installed with a hold-down kit for all branch circuit breakers used within the enclosure. No external hold-down kit is required.
The integrated load controller within IQ Combiner 6C allows users to connect and configure additional loads. The integrated load controller also facilitates load monitoring and control. If not used to connect additional loads, load controllers can also be used to connect third-party PV systems or legacy Enphase systems using the space.
Wiring • Install a breaker maximum of up to 80 A on the load controller space. • Connect L1, and L2 from the load control breaker to a non-backed-up load panel using a breaker or lugs on the load panel. •...
If IQ Combiner 6C is installed at a readily accessible outdoor location, the PV aggregate breaker functions as the Rapid Shutdown initiator. Depending on the location of various system components i.e. IQ Combiner 6C, IQ Battery, Back-fed panel one may need to install external PV disconnecting means, Rapid Shutdown initiators, or both.
Wiring 12.6.2 Grid side disconnect wiring • IQ Combiner 6C is shipped with a pre-installed jumper wire connected to the AC sense header. • Remove the wire from the AC sense header before connecting an external grid-side disconnect. •...
The combiner controller board includes two LEDs: a combiner status LED and a Shutdown Status LED. The IQ Combiner 6C continuously monitors the RSD mechanism to ensure its proper function. The IQ Combiner 6C includes a reset button, to reset the IQ Gateway and the combiner controller board as per need basis.
15. Setting up Enphase Power Control (EPC) Introduction to Enphase’s Power Control (EPC) The Enphase Energy System supports four Enphase Power Control (EPC) use cases: • MPU avoidance with Busbar Overload Control (BBoC): This feature allows maximum renewable energy generation and helps avoid the cost of panel upgrade for a large PV and battery systems under National Electric Code (NEC) 2020 705.13, reducing the system payback period.
Battery import/export only mode: The battery import-only feature ensures the Enphase IQ Battery never exports any power to the grid. The battery export-only feature ensures that the Enphase IQ Battery never imports any power from the grid but can export to the grid. Enphase IQ Battery can operate either in battery import-only mode or battery export-only mode.
Depending on the location of the IQ Battery 10C, IQ Combiner 6C, and backfed panel, the Rapid Shutdown initiators and disconnects may vary. The factory-installed PV aggregate 60 A breaker functions as a rapid shutdown initiator when the IQ Combiner 6C is installed at a readily accessible outdoor location. However, in accordance with NEC and local compliance requirements, the system can meet rapid shutdown and disconnect requirements when an external device/disconnect is required for different scenarios.
16.1 Rapid Shutdown initiator and disconnects locations for grid-forming systems The IQ Combiner 6C supports various configurations for connecting disconnects and rapid shutdown initiators for grid-forming systems. Before connecting a disconnect or a rapid shutdown initiator to the system ensure the following.
NOTE: Grid side disconnect requires a three-pole disconnect with the third pole connected to the AC-sense or a double-pole disconnect with auxiliary contacts connected to the AC-sense of IQ Combiner 6C. 16.1.2 Scenario 2: IQ Combiner 6C installed in a readily accessible area Location of IQ Combiner 6C...
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Locations of disconnects and Rapid Shutdown initiator Initiators/ Disconnect Reference notation on Battery breakers in Battery DC switches on per NEC code or utility PV aggregate breaker Grid-side disconnect single-line diagram IQ Combiner 6C IQ Battery 10C requirements PV System disconnecting means (2023 NEC 690.13) PV Rapid Shutdown (2023 NEC 690.12)
NOTE: Grid side disconnect requires a three-pole disconnect with the third pole connected to the AC-sense or a double-pole disconnect with auxiliary contacts connected to the AC-sense of IQ Combiner 6C. 16.1.3 Scenario 3: IQ Combiner 6C and IQ Battery are installed in an area that is not readily accessible Location of IQ Combiner 6C...
NOTE: Grid side disconnect requires a three-pole disconnect with the third pole connected to the AC-sense or a double-pole disconnect with auxiliary contacts connected to the AC-sense of IQ Combiner 6C. 16.1.4 Scenario 4: Backfed panel installed in a readily accessible area outdoors Location of IQ Combiner 6C...
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Locations of disconnects and Rapid Shutdown initiator Initiators/ Reference notation Disconnect per NEC PV aggregate Battery breakers in Battery DC switches on single-line PV-side disconnect Grid-side disconnect code or utility breaker IQ Combiner 6C on IQ Battery 10C diagram requirements PV System disconnecting means (2023 NEC 690.13)
16.2 Rapid Shutdown initiator and Disconnects locations for grid-tied systems The IQ Combiner 6C supports various configurations for connecting disconnects and rapid shutdown initiators for grid-tied systems. Before connecting a disconnect or a rapid shutdown initiator to the system ensure the following.
Locations of disconnects and Rapid Shutdown initiator 16.2.1 Scenario 1: IQ Combiner 6C and IQ Battery are installed in a readily accessible area Location of IQ Combiner 6C Outdoors Location IQ Battery 10C Outdoors Location of backfed panel Outdoors or indoors NOTE: Outdoors refers to an installation area that is readily accessible at an outdoor location.
NOTE: Grid side disconnect requires a three-pole disconnect with the third pole connected to the AC-sense or a double-pole disconnect with auxiliary contacts connected to the AC-sense of IQ Combiner 6C. 16.2.2 Scenario 2: IQ Combiner 6C installed in a readily accessible area Location of IQ Combiner 6C...
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Locations of disconnects and Rapid Shutdown initiator Initiators/ Reference notation Disconnect per NEC PV aggregate Battery breakers in Battery DC switches on single-line Back-fed breaker Grid-side disconnect code or Utility breaker IQ Combiner 6C on IQ Battery 10C diagram requirements PV System disconnecting means (2023 NEC 690.13)
NOTE: Grid side disconnect requires a three-pole disconnect with the third pole connected to the AC-sense or a double-pole disconnect with auxiliary contacts connected to the AC-sense of IQ Combiner 6C. 16.2.3 Scenario 3: IQ Combiner 6C and IQ Battery are installed in an area that is not readily accessible Location of IQ Combiner 6C...
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Locations of disconnects and Rapid Shutdown initiator Initiators/ Disconnect per NEC PV aggregate Battery breakers in Battery DC switches Back-fed breaker PV-side disconnect Grid-side disconnect Code or utility breaker IQ Combiner 6C on IQ Battery 10C requirements PV System disconnecting means (2023 NEC 690.13) PV Rapid Shutdown (2023 NEC 690.12)
NOTE: Grid side disconnect requires a three-pole disconnect with the third pole connected to the AC-sense or a double-pole disconnect with auxiliary contacts connected to the AC-sense of IQ Combiner 6C. 16.2.4 Scenario 4: Backfed panel installed in a readily accessible area Location of IQ Combiner 6C...
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Locations of disconnects and Rapid Shutdown initiator Initiators/ Reference Disconnect per Battery DC notation on PV aggregate Battery breakers PV-side Grid-side NEC code switches on Back-fed breaker single-line breaker in IQ Combiner 6C disconnect disconnect or utility IQ Battery 10C diagram requirements PV System...
Appendix section. NOTE: Grid side disconnect requires a three-pole disconnect with the third pole connected to the AC-sense or a double-pole disconnect with auxiliary contacts connected to the AC-sense of IQ Combiner 6C. 17. Closing the enclosure Re-install the dead front with the Mobile Connect on the enclosure.
19. Site commissioning Launch the Enphase Installer App and start System activation. Launch the Enphase Installer App. Create an activation for a new system, and enter the required information to complete system activation. Add Devices and Arrays to the system.
Safety information 20.3 FCC statement This Class B digital apparatus complies with Industry Canada ICES-003. WARNING: The IQ Combiner 6C has a pre-installed heat shield attached This equipment has been tested and found to comply with the limits for a Class B to the enclosure door.
Legends Appendix C: Legends Revision history Revision Date Description 140-00248-02 April 2025 Updated line diagrams. 140-00248-01 March 2025 Initial release. Enphase Support: https:/ /enphase.com/contact/support...
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