Enphase IQ System Controller 3 – Smart Power, Seamless Backup

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.

Key Features:

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

Additional Info:

• Warranty: 10-Year Limited

• Breakers Sold Separately

• Self-Installation Note:
  To commission your own system, Enphase University training is required.

Datasheet