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The Enphase IQ System Controller 3 is the heart of your home energy system, connecting your solar panels, IQ Batteries, and the grid—while enabling reliable backup power when you need it most. With built-in Microgrid Interconnection Device (MID) functionality, it automatically detects grid outages and transitions your system to backup mode without interruption.
Designed for both simplicity and performance, the IQ System Controller 3 consolidates essential interconnection components into one compact, pre-wired enclosure—streamlining installation and reducing labor.
Easy Installation
Compatible with service entrance¹ or main load center
Pre-installed neutral-forming transformer
Mounts to a single stud with centered brackets
Multiple conduit entry points (bottom, left, right)
Color-coded wires simplify wiring the System Shutdown Switch
Integrated hold-down eliminates need for special breakers or kits
Flexible Energy Options
Supports Sunlight Backup, Home Essentials Backup, and Full Energy Independence
Pairs with IQ Battery 5P
IQ System Controller 3G variant supports select AC standby generators
Seamless, automatic transition to backup mode during outages
Safety & Reliability
System Shutdown Switch disconnects PV, battery, and generator systems
Acts as a Rapid Shutdown Initiator for grid-forming IQ8 Microinverters
Ensures compliance with safety standards for first responders and maintenance
Warranty: 10-Year Limited
Breakers Sold Separately
Self-Installation Note:
To commission your own system, Enphase University training is required.
Boost your solar ROI with the EG4 18kPV All-In-One Hybrid Solar Inverter—a fully certified, high-capacity inverter that combines power, versatility, and ease of installation. Ideal for any modern solar energy system that demands performance, flexibility, and code compliance.
