Enphase Energy, has begun U.S. production and distribution of its IQ9N-3P commercial microinverter as of late December 2025. Made in the United States and FEOC-compliant, the IQ9N-3P is Enphase’s first microinverter to use gallium nitride (GaN) technology, designed for 480Y/277 V three-phase grids without needing external transformers.
The GaN-based design offers improved performance, higher reliability, and efficiency up to 97.5% compared to traditional silicon inverters. Its compact form can handle a continuous current of 16 A and deliver up to 427 VA peak power, supporting high-power solar panels up to 600 W.
The microinverter meets key grid standards, including UL 1741-SB and IEEE 1547-2018, and includes features like fast shutdown, phase balancing, voltage/frequency ride-through, and phase loss detection to ensure safety and system stability. Enphase commercial systems are designed to comply with UL 3141, a standard for coordinated power flow control, managed through Enphase Power Control software without requiring additional protection hardware.
IQ9N-3P microinverters are suitable for commercial solar installations ranging from under 100 kW to several hundred kW, allowing easy scalability and expansion without major redesign. By minimizing single points of failure, enabling straightforward replacement, and providing per-panel monitoring via the Enphase app, they help reduce long-term operational costs.
Because the DC-to-AC conversion occurs at each panel, these microinverters eliminate long high-voltage DC runs typical of centralized systems, offering an all-AC rooftop architecture that enhances safety.
