I see that diagram in the manual, but it is still strange to me that you need two cables. It seems redundant to make a loop like this. The FlexBoss manual has a similar diagram for paralleling inverters (without the GridBoss), but it states:
*If only two inverters are installed only one parallel cable is required. Two parallel cables will provide redundancy in the event one cable is disconnected or stops working.* I don't think I have ever seen something like that with Cat5 wiring. I would think it would cause more problems than it would solve. I'm going to run two cables today, but I will try just one to see if it works. I'll let you know. Jason Szumlanski Principal Solar Designer | Florida Solar Design Group NABCEP Certified Solar Professional (PVIP) Florida State Certified Solar Contractor CVC56956 Florida Certified Electrical Contractor EC13013208 On Sun, Oct 5, 2025 at 5:36 PM Brett Stigile via RE-wrenches < [email protected]> wrote: > Jasson > > I just did a GridBoss job. Two cat5 cables are needed between Inverters > and GridBoss. See diagrams on Gridboss manual page 36 and 37. > > One very useful thing I found was the extra help when commissioning the > system for the first time. You can log into PowerStation go to Forms > then schedule a conference call. Through the conference call you can > simply share your screen and they can walk you through the last few > details. > > > --- > Brett Stigile > Owner/Renewable Energy Electrician > 503-317-7950 > [email protected] > > Oregon Sun Wrangler LLC > CCB: 240661 > License: 66LRT > NABCEP PV Installation Professional > certification: PV 100414-008123 > > On 2025-10-05 14:02, [email protected] wrote: > > Send RE-wrenches mailing list submissions to > > [email protected] > > > > To subscribe or unsubscribe via the World Wide Web, visit > > > http://lists.re-wrenches.org/listinfo.cgi/re-wrenches-re-wrenches.org > > or, via email, send a message with subject or body 'help' to > > [email protected] > > > > You can reach the person managing the list at > > [email protected] > > > > When replying, please edit your Subject line so it is more specific > > than "Re: Contents of RE-wrenches digest..." > > > > > > When responding to posts within the Digest, be sure to restore the > > Subject: line to the exact original, and please edit out any extraneous > > lines from the quoted message. > > > > > > > > Today's Topics: > > > > 1. GridBoss with Multiple FlexBoss Parallel Comms (Jason Szumlanski) > > > > > > ---------------------------------------------------------------------- > > > > Message: 1 > > Date: Sun, 5 Oct 2025 09:31:27 -0400 > > From: Jason Szumlanski <[email protected]> > > To: RE-wrenches <[email protected]> > > Subject: [RE-wrenches] GridBoss with Multiple FlexBoss Parallel Comms > > Message-ID: > > <CAE438R_qdxegn1OxZRF+u+zE9=P1DBUJoCSAij+8EUv4LM= > [email protected]> > > Content-Type: text/plain; charset="utf-8" > > > > 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 > > -------------- next part -------------- > > An HTML attachment was scrubbed... > > URL: > > < > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org/attachments/20251005/6540f807/attachment-0001.htm > > > > > > ------------------------------ > > > > Subject: Digest Footer > > > > _______________________________________________ > > List sponsored by Redwood Alliance > > > > Pay optional member dues here: http://re-wrenches.org > > > > List Address: [email protected] > > > > Change listserver email address & settings: > > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > > > There are two list archives for searching. When one doesn't work, try > > the other: > > https://www.mail-archive.com/[email protected]/ > > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > > > List rules & etiquette: > > http://www.re-wrenches.org/etiquette.htm > > > > Check out or update participant bios: > > http://www.members.re-wrenches.org > > > > > > > > ------------------------------ > > > > End of RE-wrenches Digest, Vol 18, Issue 392 > > ******************************************** > _______________________________________________ > List sponsored by Redwood Alliance > > Pay optional member dues here: http://re-wrenches.org > > List Address: [email protected] > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > There are two list archives for searching. 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