Sunlight Backup

An Enphase Sunlight Backup system with IQ8 Series Microinverters keeps essential appliances running during a grid outage without the need to install a battery. This makes Sunlight Backup systems ideal for homeowners who want basic daytime protection from grid outages while reducing their initial investment. In addition, Sunlight Backup systems make it even easier than Solar Only systems to add batteries in the future since the IQ System Controller 2 that is required for Home Essentials Backup or Full Energy Independence will already be integrated into the system.


In this configuration, the Enphase Energy System provides backup using IQ8 Series Microinverters when the sun is shining. The system does not include any IQ Batteries. The system can support PV branch circuits rated for up to 64 A continuous current output.

The IQ System Controller 2 is installed on the load side of an existing main load panel. This configuration must be used with an essential loads solution, consisting of:

  • An off-the-shelf panel with a maximum of four 240 V L-L or eight 120 V L-N, essential load circuits that are backed up by the system. An additional 120 V L-N breaker is required to power each IQ Load Controller​.

  • Either one or two IQ Load Controllers, each enabling fine-grained, circuit-level control of each 240 V or a group of two 120 V​ essential load circuits.

Using this configuration for backing up an entire home will lead to poor customer experience and is not a use case supported by Enphase.


All the important parts you'll need for the IQ8 Series Sunlight Backup configuration.

IQ 8 Microinverter + MC4

IQ8 Series Microinverter

Our newest microinverters are the industry’s first grid-forming microinverters with split-phase power conversion capability to convert DC power to AC power efficiently.

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