The Enphase IQ System Controller 3 INT is a grid-interconnection and backup management device designed to coordinate grid power, solar PV generation, and Enphase battery storage systems. It is designed to manage the transition between grid-connected operation and backup operation during grid outages when used as part of a compatible Enphase Energy System. The controller consolidates interconnection equipment, control logic, and communication gateway functions into a single enclosure, streamlining installation for residential and light commercial energy systems. This equipment is intended for professional installation and commissioning by qualified solar or electrical installation professionals in accordance with applicable grid regulations and standards. The system features an IP55-rated enclosure, integrated system shutdown functionality, and support for both single-phase and three-phase grid configurations. Authorised retailer of Enphase Energy. Specification• Rated Main Circuit Capacity: Up to 100 A (single-phase) / 80 A (three-phase)• Grid Compatibility: Single-phase and Three-phase• Function: Microgrid interconnection and backup control• Grid Detection: Automatic (system-dependent)• Backup Operation: Supported when configured within a compatible system• Communication: Wired control, integrated gateway• Enclosure Rating: IP55• Installation: Indoor / Outdoor• Compliance: G98, G99
