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Frequently asked questions
What is the limited warranty period for IQ8 Series Microinverters?

IQ8 Series Microinverters come with a 25-year limited warranty in North America.

Are the IQ8P-3P and IQ8H-3P high-power three-phase residential versions of the IQ8 series microinverters?

No, the IQ8P-3P and IQ8H-3P constitute a separate commercial product line designed specifically for three-phase installations only. The IQ8 Commercial Microinverters feature an entirely different form factor and mounting bracket and are only compatible with the three-phase QD Cable and IQ Commercial Gateway 2. IQ8 series microinverters used for residential purposes are only compatible with single/split-phase systems utilizing Enphase Q Cable and IQ Gateway.

How will a three-phase IQ8 Series Microinverters Enphase Energy System design differ from a three-phase IQ7+ Enphase Energy system design?
  • A three-phase IQ7+ system utilizes the IQ7+ Microinverter, Enphase Q Cable (2-wired cable) and the Enphase IQ Gateway Commercial – either standalone or as part of the Enphase Three Phase Network Protection Relay (TPNPR) to provide loss of phase detection. Phase balancing in a three-phase IQ7+ system requires allocating the branch circuits equally across the three phases in the PV aggregation panel.

  • A three-phase IQ8 Commercial microinverter system utilizes the IQ8P-3P or IQ8HC-3P microinverter, the Enphase QD Cable (4-wired cable) and the Enphase IQ Gateway Commercial 2. In no circumstance is the Enphase TPNPR required on an IQ8 Commercial PV system. The QD Cable provides Auto Phase Rotation and Neutral Sense Capabilities. Please visit the IQ8 Commercial information page for configuration diagrams.

Will the Commercial Enphase Energy System be compatible with other battery storage in the market?
  • Enphase has not evaluated nor tested the integration of the IQ8 Commercial PV System with any 3rd-party single-phase or three-phase battery solution and cannot support installations where three-phase solar PV and 3rd-party storage integration are required.

What are the features of a Commercial Enphase Energy System?
  • The Enphase IQ8 Commercial PV System is a grid-tied, three-phase, 208V PV solution that will be fully compliant with IEEE1547:2018 standards upon release. Each IQ8 Commercial microinverter, either the IQ8P-3P or IQ8HC-3P, connects to a single PV module and integrates with the Enphase IQ Commercial Gateway 2 and Enphase monitoring and analysis software. The IQ8 Commercial PV System will offer system-level rapid shutdown compliance with UL-listed PV modules; offers advanced grid functionalities, voltage and frequency ride through, and neutral sense capabilities.

Will Enphase also launch a three-phase commercial battery solution?
  • Enphase is evaluating storage solutions for three-phase applications. We look forward to providing an update in the future.

Will installers use the same commissioning and monitoring software for Commercial Enphase Energy Systems as I do for other Enphase installations?
  • Yes, you will use the same commissioning application for IQ8 Commercial PV Systems and you will be able to monitor your entire fleet of installed systems, irrespective of individual site type or microinverter. In anticipation of IQ8 Commercial, Enphase plans to rollout advanced fleet management and kiosk features to our existing software application in 2022. These new features will be accessed through your existing dashboard and login credentials.

Will system owners use the same Enphase App to monitor their Commercial Enphase Energy System as their home energy system?
  • Yes, all system owners will utilize the same app, irrespective of system type. Owners with multiple systems can access all their Enphase systems from a single login to the Enphase App.

Can I pair IQ8 Series Microinverters with bifacial solar modules?

You can pair Enphase IQ8 Microinverters with bifacial solar modules if they are electrically compatible and installed according to the Quick Installation Guide supplied with the microinverters.

In case if there is no mandatory regulation for inverter sizing by the local utilities, use the microinverter sizing methodology of a conventional mono-facial module. However, use the real power (gained power) rather than the nominal power of the bifacial solar module. For example, if a 20% gain is expected, then refer to the module output parameters associated with the 20% gain instead of the nameplate rating of the module.

You can always use the Enphase Module Compatibility calculator to feed-in the module output parameters and check the compatibility.

When can I purchase components for a Commercial Enphase Energy System from distributors?

We are targeting availability in November 2023.

How can installers tell if the firmware has been updated?

In the Enphase Installer Portal (formally known as Enlighten Manager):

1. Click on “Systems” tab
2. Select a system from the list
3. Click the “Devices” tab
4. The "Processor Load" column will show the existing firmware version

Which configurations support load control?

All configurations with IQ System Controllers support load control. For Sunlight Backup, an essential loads solution is required. Please see the Sunlight Backup with IQ8 tech briefs for additional details.

What modules will be compatible with the Commercial Enphase Energy System?
  • IQ8 Commercial microinverters are compatible with high-power modules from 54-cell up to 72-cell with full or cut-cell configuration. 

Is the Commercial Enphase Energy System grid-forming capable?
  • No, IQ8 Commercial PV systems will be grid-tied only upon release Spring 2023.

How should I document model numbers in permits and plan sets?

Enphase recommends installers submit Enphase microinverter model numbers on permits and plan sets using an “-x” in place of either the “-2” or “-M”, and add “where x = 2 or M.”

For example: “Model Number: IQ7-60-x-US, where x = 2 or M” or “IQ8PLUS-72-x-US, where x = 2 or M.”

Where can I find more information on the IQ8P-3P and IQ8H-3P from Commercial Enphase Energy Systems?
  • Please visit our IQ8 Commercial page here:


Does Enphase offer any design-related services to Commercial Enphase Energy System installers?

Enphase is currently offering, for a limited time, design reviews at no charge for commercial systems. Separately, a select set of Enphase Installer Network (EIN) installers can now procure comprehensive design services from Enphase.

If you’re interested in procuring design services for prospective commercial projects using IQ7+ Series or IQ8 Series Microinverters, please reach out to your Enphase regional sales manager.

Can I use IQ8, IQ8A, IQ8M, or IQ8+ Microinverters in a Commercial Enphase Energy System?
  • No. These microinverter models are not tested for three-phase applications and are not UL Listed. Only IQ8P-3P and IQ8H-3P Microinverters are compatible with a Commercial Enphase Energy System.

What are the power output levels of IQ8P-3P and IQ8H-3P?
  • IQ8 Commercial Microinverters will be available in two variants: IQ8P-3P with 475 W maximum continuous output power (480 W, peak power), and IQ8H-3P with 380 W maximum continuous output power (384 W, peak power).

What are the improvements in the IQ8 Series Microinverter firmware release 2.48.01?

This firmware release upgrades the DC input specifications of IQ8 Series Microinverters, making them suitable for pairing with solar modules with higher currents.

•  Maximum continuous DC current increased to 12 A (previously 10.6 A)

•  Wider operating voltage range of 16-58 V (previously 25-58 V)

•  Improved power tracking with wider MPPT voltage range

•  Start-up voltage lowered to 22 V (previously 30 V)