What are the different commercial microinverters being introduced by Enphase?

In addition to the existing IQ8 Commercial Microinverter (IQ8P-3P), Enphase is introducing one new model for commercial use: the IQ9N-3P-277 (427 VA), for 480 V AC, 60 Hz grids.

Can IQ9 Commercial Microinverters be installed in a system with an AC-coupled battery?

Enphase has successfully tested several battery systems, but some may need custom configuration based on the site. To review your setup, share your project details, wiring diagram, operating assumptions, and interconnection agreement with the Enphase engineering team.

Like the IQ8 Commercial Microinverter (IQ8P-3P), do I need to have branches where the number of microinverters per circuit is divisible by 3?

No, that's not required. But depending on your local utility’s rules, you may need to balance power across all three phases.

What is the maximum number of inverters on each side of the center-tap connector for IQ9 Commercial Microinverters?

All QD cable variants include a center-tap connector positioned after every six microinverter drops. For the IQ9N-3P-277, you can connect up to eighteen microinverters on one side of the center-tap connector to keep voltage rise under 1% in the QD cable.

What are the circuit size limitations of IQ9 Commercial Microinverters?

For the IQ9N-3P-277: 30 microinverters per 20 A three-phase branch circuit.

Available now

SKU: IQ9N-3P-277-A-US

IQ9N-3P Microinverter

Powered by advanced GaN-based architecture and the trusted Enphase platform, the IQ9 Microinverter delivers high performance, long-term reliability, and seamless compatibility with today’s high-powered commercial modules—all in a compact form.

It supports 277 V (L-N) three-phase grids without the need for external transformers, enabling streamlined designs for 480 VAC projects. Each IQ9N-3P Microinverter pairs with a single module and integrates with QD Cables and the IQ Gateway Commercial Pro.

Built-in features like rapid shutdown, phase balancing, voltage/frequency ride-through, and loss-of-phase detection ensures grid compliance and safety. Remote diagnostics and full fleet visibility via the Enphase Installer Portal and App reduce site visits and boost system performance.

How to buy

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Height	206.5 mm
Width	187 mm
Depth	39.2 mm
Weight	1.2 kg

The IQ9N-3P Microinverter meets the highest reliability standards in the industry, and comes with an industry-leading limited warranty of up to 25 years.

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