[RE-wrenches] GridBoss with Multiple FlexBoss Parallel Comms

Jason Szumlanski jason at floridasolardesigngroup.com
Sun Oct 5 06:31:27 PDT 2025


The manual seems to indicate diagrammatically that a Cat5 cable is required
between the GridBoss and each FlexBoss inverter, but the text seems to
indicate only a single Cat5 wire is required between the GridBoss and
master FlexBoss.

Can anyone confirm if a single Cat5 will work?

I have a 100 foot run from the GridBoss to my inverters. I'm thinking about
using a single Cat5 cable for comms and a CL3R cable for the RSD connection
through the attic.

Obviously, the included parallel cable should be used between the
inverters. I get that part.

Jason Szumlanski
Florida Solar Design Group
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