Step 2: Minimum clearance AUX wiring: PV shedding/load control Step 3: Opening the door Step 4: Mounting the IQ System Controller 3 INT Close dead front and install breaker filler plate Step 5: Opening the dead front Connecting Cellular modem...
Introduction The IQ System Controller 3 INT connects the home to grid power, the IQ Battery storage system, and solar PV. It provides microgrid interconnection device (MID) functionality by automatically detecting and seamlessly transitioning the home energy system from grid power to backup power in the event of a grid failure.
Provided by installer* * Recommended Electra EAS7302PHV or the LAPP 1270802 NOTE: The IQ System Controller 3 INT weighs 15.2 kg and will require two people to lift and align the unit. IQ System Controller 3 INT Quick Install Guide...
Plan a location for mounting the unit • IQ System Controller 3 INT is IP55 rated and can be mounted both indoors and outdoors. Install the unit where it is not exposed to direct rainfall. • Install this product where cables from PV, incoming mains, and batteries are easily accesible and can be terminated at the IQ System Controller 3 INT.
Section A - Mounting an IQ System Controller 3 INT Step 2: Minimum clearance This product must be installed with clearance at the left, right, top, bottom, and front of the product as shown in the figure. Follow all local standards and regulations related to mounting of an IQ System Controller 3 INT.
IQ System Controller 3 INT. Doing so may create a hazard, cause serious injury, and/or damage the equipment. • The IQ System Controller 3 INT weighs 15.2 kg and will require two people to lift and align the unit. •...
• Place the IQ System Controller 3 INT on the wall so that the mounting holes at middle of the mounting tabs are aligned with the center of the stud. Mark the top center hole for predrilling and keep the unit aside safely.
Section A - Mounting an IQ System Controller 3 INT Step 5: Opening the dead front Before removing the dead front, ensure the IQ System Controller 3 INT is completely de-energized. Risk of equipment damage. Do not wire the IQ System Controller 3 INT when it is energized.
Section B - Wiring Internal view of IQ System Controller 3 INT Once the dead front is removed the IQ System Controller 3 INT looks like the diagram below. DIN rails are provided to install breakers. Use conductors (line, neutral, and ground) and breakers of proper ampacity and protection requirements according to local codes.
WARNING: PV neutral must be wired to breaker before landing indicated on equipment labels (12, 13). Maintaining correct on neutral lugs. Battery neutral must be wired to neutral bar. phase continuity is necessary for proper operation. IQ System Controller 3 INT Quick Install Guide...
NOTE: Breakers for IQ Battery, mains, and non-backup/backup loads Protective earth (PE) ground (GND) are not supplied with IQ System Controller 3 INT and must be purchased separately. Single-phase (L) (1-wire line) Size the conductors and breakers according to local electrical codes.
Back view Left side view NOTE: Dimensions in the images indicate the diameter of conduit drill holes. 10 mm thickness to be considered for conduit thickness. Bottom view 40 mm 51 mm IQ System Controller 3 INT Quick Install Guide...
NOTE: Do not change the IQ Gateway breaker position from ^ Breakers should be sized as per local requirements and procured slot number 19 (indicated in dead front). separately. They are not supplied with the IQ System Controller 3 INT. IQ System Controller 3 INT Quick Install Guide...
NOTE: Do not change the IQ Gateway breaker position from ^ Breakers should be sized as per local requirements and procured slot number 19 (indicated in dead front). separately. They are not supplied with the IQ System Controller 3 INT. IQ System Controller 3 INT Quick Install Guide...
Neutral PV neutral PV L1 NOTE: Do not change the IQ Gateway breaker position from * Pre-installed four-pole breaker to be used for PV wiring. slot number 19 (indicated in dead front). IQ System Controller 3 INT Quick Install Guide...
* Pre-installed four-pole breaker to be used for PV wiring. slot number 19 (indicated in dead front). ^ Breakers should be sized as per local requirements and procured separately. They are not supplied with the IQ System Controller 3 INT. IQ System Controller 3 INT Quick Install Guide...
PV L1 PV neutral PV L1 NOTE: Do not change the IQ Gateway breaker position from * Pre-installed four-pole breaker to be used for PV wiring. slot number 19 (indicated in dead front). IQ System Controller 3 INT Quick Install Guide...
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* Pre-installed four-pole breaker to be used for PV wiring. slot number 19 (indicated in dead front). ^ Breakers should be sized as per local requirements and procured separately. They are not supplied with the IQ System Controller 3 INT. IQ System Controller 3 INT Quick Install Guide...
Neutral Non-backup loads from PV L1 backup panel PV neutral Neutral from IQ Battery Main Utility Utility non-backup neutral PV L1 Switch grid meter panel IQ Battery L1 PV neutral IQ Battery(s) IQ System Controller 3 INT Quick Install Guide...
NOTE: Do not change the IQ Gateway breaker position from ^ Breakers should be sized as per local requirements and procured slot number 19 (indicated in dead front). separately. They are not supplied with the IQ System Controller 3 INT. IQ System Controller 3 INT Quick Install Guide...
NOTE: Do not change the IQ Gateway breaker position from ^ Breakers should be sized as per local requirements and procured separately. They are not supplied with the IQ System Controller 3 INT. slot number 19 (indicated in dead front).
PV L1, L2, and L3 NOTE: Do not change the IQ Gateway breaker position from * Pre-installed four-pole breaker to be used for PV wiring. slot number 19 (indicated in dead front). IQ System Controller 3 INT Quick Install Guide...
^ Breakers should be sized as per local requirements and procured WARNING! Do not daisy chain neutral wire across batteries separately. They are not supplied with the IQ System Controller 3 INT. on different phases. Each phase of batteries must have a separate neutral wire that is terminated on the neutral bar in the IQ System Controller 3 INT.
38 mm 76 mm or to be trimmed till jacket, when not connected to drain terminal Scenario 1: When IQ System Controller 3 INT is a terminal node for • Control wiring colours are indicative and might differ for the control network (at the end of the control cable loop), use a different manufacturers connector with a termination resistor in the terminal port.
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To ensure proper control (CTRL) cable connection between NOTE: To avoid mis-wiring note the wire color as well as the IQ System Controller 3 INT and IQ Batteries follow the guidelines number on the wire cores. The figure alongside and the table outlined below while connecting the cable to the headers.
Following are three indicative wiring sequences: control network. Sequence 1: IQ System Controller 3 INT → IQ Battery(s) 5P NOTE: Total length of CTRL wiring across the system cannot exceed 75 meters to ensure system operates as per specifications.
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Section B - Wiring Sequence 3: IQ Battery(s) 5P → IQ System Controller 3 INT → IQ Battery(s) 5P NOTE: Total length of CTRL wiring across the system cannot exceed 75 meters to ensure system operates as per specifications. Here is a table providing termination resistor locations for the above sequences:...
Wiring for load control must use contactor to break the supply to loads breaker non-essential loads. PV L1 For more details refer to commissioning guide and tech briefs. PV neutral IQ System Controller 3 INT Quick Install Guide...
Philips screw #2 Torque: 1.4 N m NOTE: Breakers for solar, IQ Battery, mains, and non-backup/ backup loads are not supplied with IQ System Controller 3 INT and must be purchased separately. Breaker configurations shown in the above images are indicative.
Primary internet connectivity must be provided using the homeowner’s Ethernet/Wi-Fi. Cellular connectivity is subject to network operator coverage and signal strength. The IQ System Controller 3 INT is packaged with the Mobile Connect Cellular modem - CELLMODEM-M1-06-AT-05. Connecting the USB cable Connect the USB cable to the USB port(s) on the IQ System Controller.
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P O W E R L E D I N D I C AT E S can use the Enphase Installer App to check the modem status and DC power via USB not present cellular signal strength. The IQ Gateway’s AP (Access Point) Wi-Fi...
IQ System Controller 3 INT when it is energized. • Use approprialtely sized ferrule to terminate the wire in the Any system using the IQ System Controller 3 INT requires a system header. shutdown (SSD) switch. The SSD switch when used in conjunction with PV and battery breakers disconnect all PV panels and battery •...
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Turn the SSD switch to the “OFF” position. Turn the SSD switch to the “ON” position. Press the DC switches on all IQ Battery 5P units to turn them Turn the PV breakers in the IQ System Controller 3 INT to “ON” “OFF” position.
WARNING! Risk of equipment damage. Do not wire the IQ System Controller 3 INT when it is energized. • If you do not see the IQ System Controller 3 INT information in Enphase Installer App, check that the You must ensure that all electrical circuits external to IQ Gateway AP mode light is green.
Turn OFF the IQ Battery breaker(s), PV breaker(s) in IQ been instructed to do so by Enphase support. System Controller 3 INT. Turn OFF the mains breaker in IQ System Controller 3 INT IQ Gateway display and controls and turn OFF the incoming grid supply.
Safety IMPORTANT SAFETY INSTRUCTIONS. SAVE THESE INSTRUCTIONS. This guide contains important instructions that you must follow during installation and maintenance of the IQ System Controller 3 INT. Failing to follow any of these instructions may void the warranty (enphase.com/warranty). In Case of Fire or Other Emergency WARNING: Risk of equipment damage.
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Enphase shall have no responsibility, nor any liability to any end user for network service provider’s non-coverage, lack of coverage, defective Potential interference with pacemakers and other medical coverage, or termination of the coverage.
Added Cellular modem support and associated safety page. Added page with system shutdown switch wiring instructions as well as steps to activate/de-activate system shutdown. Made minor corrections and grammatical corrections to content across QIG. Previous releases IQ System Controller 3 INT Quick Install Guide...
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