Enphase IQ9S-3P 584W Microinverter Domestic Content IQ9S-3P-277-B-DOM-US
MPN No: IQ9S-3P-277-B-DOM-US
Expected ship date Nov 22 - 29
In Stock
$193.99
Enphase IQ9S-3P 584W Microinverter Domestic Content IQ9S-3P-277-B-DOM-US
Enphase IQ9S-3P 584W Microinverter Domestic Content IQ9S-3P-277-B-DOM-US
Regular price
$193.99
New
474 IN STOCK
Enphase IQ9S-3P 584W Microinverter Domestic Content IQ9S-3P-277-B-DOM-US
Enphase IQ9S-3P 584W Microinverter Domestic Content IQ9S-3P-277-B-DOM-US
Available
MPN No: IQ9S-3P-277-B-DOM-US
Regular price
$193.99
Expected ship date Nov 22 - 29
Data Sheet
U.S. Warehouse
Trusted by Thousands
Expert U.S. Support
Regular price
$193.99
Enphase IQ9S-3P 584W Microinverter Domestic Content IQ9S-3P-277-B-DOM-US
MPN No:
IQ9S-3P-277-B-DOM-US
Expected ship date Nov 22 - 29
Enphase IQ9S-3P 548W 277V Commercial Microinverter – IQ9S-3P-277-B-DOM-US
The Enphase IQ9S-3P Commercial Microinverter brings module-level power conversion, advanced grid support, and intelligent monitoring to commercial solar installations. Designed for three-phase electrical systems, this high-powered microinverter converts electricity from an individual solar panel into grid-compatible AC power while helping maximize energy harvest across the array.
Manufactured in the United States, this domestic-content version is designed to support commercial solar projects pursuing applicable domestic-content incentives. Its compact, fanless construction, plug-and-play connections, and integration with Enphase commercial monitoring technology help simplify installation and long-term system management.
Key Features & Benefits
- Commercial Three-Phase Design: Engineered for commercial PV installations using compatible WYE electrical systems.
- Domestic Content Version: Manufactured in the United States, with domestically manufactured electrical components and enclosure to support qualifying domestic-content projects.
- Module-Level Power Conversion: Converts DC electricity into AC power at each solar module, allowing individual panel-level energy harvesting.
- High-Powered Module Compatibility: Designed to pair with modern, high-output commercial solar panels within supported electrical limits.
- Advanced Grid Support: Meets current grid-interconnection requirements, including IEEE 1547 and California Rule 21.
- Intelligent Monitoring: Integrates with the Enphase IQ Gateway Commercial Pro, Enphase App, and analysis software.
- Plug-and-Play Installation: Uses Enphase AC connections and Staubli MC4 DC connectors for streamlined system assembly.
- Remote Firmware Updates: Supports updates for changing utility grid requirements.
- Outdoor-Rated Construction: Durable, corrosion-resistant enclosure designed for demanding commercial environments.
- Fanless Cooling: Natural convection cooling eliminates the need for mechanical fans.
Designed for Commercial Three-Phase Solar Systems
The IQ9S Commercial Microinverter is engineered for commercial rooftop and other grid-connected PV installations. Unlike residential microinverters designed for conventional split-phase service, this model operates in a commercial WYE electrical configuration.
Its module-level architecture provides distributed power conversion throughout the array. Each microinverter manages its connected solar panel independently, helping reduce the impact of module mismatch, shading, or differences in individual panel performance.
The system is designed to support commercial installations using compatible Enphase branch-circuit equipment, gateway hardware, and monitoring infrastructure.
Domestic Content for Commercial Solar Projects
This version of the IQ9S Commercial Microinverter is manufactured in the United States. According to Enphase, its printed circuit board assembly, electrical parts, and enclosure are domestically manufactured to meet eligibility requirements for the federal investment tax credit domestic-content bonus adder.
For commercial developers, EPC contractors, and solar installers, selecting domestically manufactured components can help support project procurement strategies where domestic-content requirements are a priority.
Final eligibility for any tax incentive depends on the complete project, applicable regulations, documentation, and domestic-content calculations. The microinverter's manufacturing status alone does not establish eligibility for the entire installation.
Advanced Grid Support and Smart Monitoring
The IQ9S supports advanced grid-interconnection functions designed to meet modern utility requirements. Configurable grid profiles, power factor capabilities, and remote firmware updates help installers adapt systems to changing grid standards.
When connected to the Enphase IQ Gateway Commercial Pro, the microinverter communicates through power line communication technology. Installers and system owners can access production data and system information through supported Enphase monitoring and analysis tools.
This connected architecture helps simplify commissioning, performance monitoring, and ongoing commercial solar system maintenance.
System Compatibility and Installation Requirements
The IQ9S is intended for use as part of a properly designed Enphase commercial microinverter system.
Depending on the installation, additional equipment may include:
- Compatible commercial solar modules
- Enphase QD commercial AC cabling and connectors
- Enphase IQ Gateway Commercial Pro
- Compatible branch-circuit protection and AC distribution equipment
- Appropriate mounting and grounding equipment
- Required disconnects and other electrical balance-of-system components
Module selection must account for operating voltage, open-circuit voltage, current limits, and expected environmental conditions. Commercial branch-circuit design and utility interconnection must follow Enphase installation instructions and applicable electrical requirements.
Product Specifications
| Specification | Details |
|---|---|
| Maximum Continuous / Peak AC Output | 548VA / 548VA |
| Nominal Grid Voltage / Frequency | 277V L-N / 60Hz (480V three-phase WYE system) |
| Common PV Module Pairing Range | 500–770W |
| DC Operating / MPPT Voltage | 18–65V / 32–55V |
| Maximum DC Input Voltage | 70V (65V maximum under specified higher-temperature conditions) |
| Maximum DC Continuous / Short-Circuit Current | 18A / 24A module Isc; 30A maximum short-circuit input |
| Maximum Continuous AC Output Current | 1.98A |
| CEC Weighted Efficiency | 97.5% |
| Dimensions / Weight | 8.4 × 7.76 × 1.27 in / 2.65 lb (1.2 kg) |
| Enclosure / Warranty | NEMA Type 6, outdoor / Limited warranty up to 25 years |
Frequently Asked Questions
Is the Enphase IQ9S-3P a commercial or residential microinverter?
The IQ9S-3P is a commercial microinverter designed for compatible three-phase WYE electrical systems. It is not intended as a direct replacement for conventional residential split-phase microinverters.
Is this microinverter made in the United States?
Yes. Enphase identifies the IQ9S-3P domestic-content version as manufactured in the United States, including its printed circuit board assembly, electrical parts, and enclosure.
Does this model qualify for domestic-content tax incentives?
Enphase states that this domestic-content version is manufactured to meet eligibility requirements for the federal ITC domestic-content bonus adder. However, eligibility depends on the entire solar project and applicable tax rules. Project developers should verify the complete system's compliance and documentation.
What size solar panels can be paired with the IQ9S?
The IQ9S is designed for high-powered commercial solar modules. Panel selection must account for DC voltage, current, and other electrical requirements, not just nameplate wattage. Enphase recommends checking its module compatibility calculator for the intended panel.
Does the IQ9S work with a 208V three-phase electrical system?
This specific IQ9S model is designed for 277V line-to-neutral connections in compatible 480V WYE systems. It is not intended for direct connection to a standard 208V three-phase service without an appropriately engineered transformer or other supported system configuration.
Does this microinverter require an Enphase gateway?
The IQ9S integrates with the Enphase IQ Gateway Commercial Pro for communication, monitoring, and supported system management functions. The gateway is sold separately.
How many IQ9S microinverters can be installed on one branch circuit?
Enphase specifies a maximum of 24 IQ9S microinverters per 20A three-phase branch circuit in the applicable 480V WYE configuration. Final circuit design must follow Enphase instructions and applicable electrical codes.
Does the IQ9S provide battery backup during a grid outage?
The IQ9S is a grid-connected commercial microinverter and does not independently provide battery backup or off-grid operation. Backup functionality would require a separately engineered, compatible system.
Are AC cables and the IQ Gateway included?
No. This listing is for the IQ9S commercial microinverter only. Enphase commercial AC cables, the IQ Gateway Commercial Pro, and other installation accessories are sold separately.
