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The IQ System Controller 3 INT connects the home to the public electricity grid, the IQ Battery 5P with FlexPhase storage system, and IQ7 or IQ8 Series Microinverter circuits. It provides automatic transfer switch (ATS) functionality that automatically detects and transitions the home energy system from grid power to backup power in the event of a power cut. It consolidates interconnection equipment, IQ Gateway Metered, and IQ Relay functionality into a single enclosure and streamlines grid-independent capabilities of PV and storage installations by providing a consistent, pre-wired solution, including CTs.
No, an IQ System Controller is needed only if you desire to have a backup application. It is not needed in the case of grid-tied systems.
Yes, the IQ System Controller can support up to 80 A of current per phase.