Enphase Communications Kit 2 - Enables wired communications using Control cables for systems not using IQ Combiner 5/5C

Enphase COMMS-KIT-02 Communications Kit
The Communications Kit 2 enables communication between the IQ Gateway, IQ Battery 5P, and IQ System Controller 3/3G. It is not compatible with previous versions of the IQ Battery or IQ System Controller. This kit can upgrade PV-only sites to grid-tied or grid-forming systems without an IQ Combiner 5/5C, as the functionality of the Communications Kit 2 is integrated into the IQ Combiner 5/5C, making the kit unnecessary when using an IQ Combiner 5/5C.
Reliable:
5-year limited warranty
Uses wired control communication for fast and consistent communication
Safe - Minimal voltage and easy to install
Backwards compatible:
Enables IQ Battery 5P and IQ System Controller 3/3G to be installed on sites with:
IQ Series Microinverters when using combiners or gateway versions older than IQ Combiner 5/5C
M Series Microinverters when using an Envoy S Metered