Product details
About This Product
The Enphase IQ9N-3P-277 427VA Three-Phase Microinverter is a commercial module-level inverter designed for 480V WYE three-phase PV systems with 277V line-to-neutral service. Each microinverter connects to one compatible solar module and provides up to 427VA continuous AC output. The IQ9N-3P-277 uses an Enphase QD 4-pin AC connection and an MC4 DC input connection, with phase balancing handled through the three-phase QD Cable system. It is designed for US commercial grid-tied installations and integrates with the Enphase IQ Gateway Commercial platform for system monitoring and management.
Product Explainer Video
Introducing the Enphase IQ9N Commercial Microinverter for 480 V three-phase systems
Who This Product Suits
The Enphase IQ9N-3P-277 is intended for commercial solar installations using 480V WYE three-phase electrical service. It suits installers who want module-level power conversion rather than a centralized string inverter architecture, particularly where individual module monitoring, flexible array layouts, and simplified DC design are useful. The microinverter supports compatible monofacial and bifacial PV modules and is designed around the Enphase commercial QD cabling and gateway ecosystem. System design, branch-circuit loading, conductor sizing, overcurrent protection, rapid shutdown, and interconnection should be completed in accordance with Enphase instructions, applicable NEC requirements, and local utility rules.
Specifications Explained
- Maximum continuous output: 427VA per microinverter.
- Grid connection: Designed for 480V WYE commercial systems with 277V line-to-neutral operation at 60Hz.
- PV module pairing: Supports compatible PV modules within the manufacturer’s electrical limits, with a 28-45V maximum power tracking range.
- DC input: Up to 16A maximum continuous module current and 25A maximum input short-circuit current.
- Efficiency: 97.5% CEC weighted efficiency.
- Branch circuits: Up to 30 IQ9N-3P-277 microinverters can be installed on a properly designed 20A, 480V three-phase branch circuit.
- Connections: MC4 DC input and Enphase QD 4-pin AC connector.
- Cooling: Passive natural-convection cooling with no fan.
- Installation environment: NEMA Type 6 outdoor enclosure approved for wet locations.
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Summary
The Enphase IQ9N-3P-277 is a 427VA commercial microinverter specifically designed for 480/277V WYE three-phase solar installations. It combines module-level conversion with Enphase three-phase QD cabling and commercial monitoring infrastructure, making it a practical choice for commercial arrays designed around the Enphase architecture. Installers should confirm PV module compatibility and complete branch-circuit and interconnection design for the specific project before installation.
Further Information From The Manufacturer
Enphase IQ9N-3P-277 microinverter, 427 VA peak power, 480V AC output with 4 pin AC connector compatible with Enphase QD cabling; and MC4 Bulkhead for DC input for US market. Laser Weld Enclosure. Navitas 70mR
| Power Output | 475 Watts |
| Voltage | 277 Volt |
| Manufacturer Warranty | 25 Years |
| Performance Warranty | 25 |
| Shipping Weight | 2.65608466 lb |
| Shipping Dimensions | 8.25 x 7.38 x 1.25 in |
About Enphase
Enphase is a global leader in microinverters and fully integrated solar-plus-storage ecosystems. Its U.S. product lineup includes microinverters, batteries, EV charging and advanced monitoring through the Enphase platform.
The brand is widely used in residential solar projects where module-level monitoring, flexible array design and strong installer support are priorities. Enphase systems are especially common in projects that value visibility, expandability and straightforward serviceability.
More Explainer Videos
Explore the Enphase Commercial Ecosystem & IQ9N 480 Volt Microinverter
Enphase IQ8P 3P Commercial Microinverter Installation & Design Training
