Sunlight Backup with IQ8

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and other names are trademarks of Enphase Energy, Inc. Data subject to change.

LCSB-TB-0009-01-EN-US-12-23-2021

Load Control software enhancements

with Gateway software 7.0

Gateway software 7.0 brings in support for IQ8-based systems and includes enhancements

to the load control feature. These enhancements are only available when using IQ System

Controller 2.

When commissioning a gateway running software version 7.0 or higher with Installer app

version 3.24.0 or higher:

• The Installer app automatically detects a Sunlight Backup use case by the presence

of grid forming IQ8 solar microinverters and the IQ System Controller 2, as well as the

absence of IQ Batteries

• Once the app has detected a Sunlight Backup use case it requires installers to scan 2x

IQ Load Controllers to proceed with commissioning

• For a Sunlight Backup use case the Installer app will automatically set all controlled

loads to the Scheduled mode with a xed time window of 9am to 4pm local time. This

means all essential loads are available only between 9am to 4pm local time if the system

is running o-grid i.e., during a grid outage. This is to ensure that the system provides

backup to loads only during time periods where there is typically adequate sunlight and

avoids multiple restarts of loads

The new scheduled mode for Load Control is also available to use with other backup use

cases with IQ8 and IQ Batteries.

• For backup use cases that include IQ Batteries (Home Essentials Backup and Full Grid

Independence) the homeowner can change the schedule to any preferred time using

the Enphase App

• For the Sunlight Backup use case the homeowner can change the schedule to a time

within 9am to 4pm local time

Even with the scheduled mode there can be instances when load power requirements

exceed available power from the sun. This can be due to a cloudy day, shading due to trees

etc. The system software has been built to intelligently handle microgrid collapses and

provide the maximum chance of successfully restoring power to the home.

• When the system is running o-grid, the system will shutdown if the available power

is not sucient to meet requirements

• After a short delay the system will restart or blackstart using the power available from

IQ8 solar microinverters

• The system software uses the granular control of loads to try each load individually

after restarting

• Loads that repeatedly cause a system shutdown are shed automatically after a few tries

so that the homeowner gets the microgrid back with the loads that can be supported

• The homeowner can manually reconnect a load that was shed if they believe that the

power available has increased (for example during noon time when irradiance from the

sun increases)

• All loads are connected back to the system when the system connects back to the

utility grid