<div dir="ltr"><div dir="ltr"><div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">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: </div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><i>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></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">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.</div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><br></div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">I'm going to run two cables today, but I will try just one to see if it works. I'll let you know.</div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><br></div><br clear="all"></div><div><div dir="ltr" class="gmail_signature"><div dir="ltr"><br>Jason Szumlanski<div><span style="color:rgb(51,51,51);font-family:Roboto,RobotoDraft,Helvetica,Arial,sans-serif;font-size:13px">Principal Solar Designer | Florida Solar Design Group</span><br style="color:rgb(51,51,51);font-family:Roboto,RobotoDraft,Helvetica,Arial,sans-serif;font-size:13px"><span style="color:rgb(51,51,51);font-family:Roboto,RobotoDraft,Helvetica,Arial,sans-serif;font-size:13px">NABCEP Certified Solar Professional (PVIP)</span><br style="color:rgb(51,51,51);font-family:Roboto,RobotoDraft,Helvetica,Arial,sans-serif;font-size:13px"><span style="color:rgb(51,51,51);font-family:Roboto,RobotoDraft,Helvetica,Arial,sans-serif;font-size:13px">Florida State Certified Solar Contractor CVC56956</span></div><div><font color="#333333" face="Roboto, RobotoDraft, Helvetica, Arial, sans-serif">Florida Certified Electrical Contractor EC13013208</font></div></div></div></div><br></div><br><div class="gmail_quote gmail_quote_container"><div dir="ltr" class="gmail_attr">On Sun, Oct 5, 2025 at 5:36\u202fPM Brett Stigile via RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org">re-wrenches@lists.re-wrenches.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Jasson<br>
<br>
I just did a GridBoss job. Two cat5 cables are needed between Inverters <br>
and GridBoss. See diagrams on Gridboss manual page 36 and 37.<br>
<br>
One very useful thing I found was the extra help when commissioning the <br>
system for the first time. You can log into PowerStation go to Forms <br>
then schedule a conference call. Through the conference call you can <br>
simply share your screen and they can walk you through the last few <br>
details.<br>
<br>
<br>
---<br>
Brett Stigile<br>
Owner/Renewable Energy Electrician<br>
503-317-7950<br>
<a href="mailto:brett@oregonsunwrangler.com" target="_blank">brett@oregonsunwrangler.com</a><br>
<br>
Oregon Sun Wrangler LLC<br>
CCB: 240661<br>
License: 66LRT<br>
NABCEP PV Installation Professional<br>
certification: PV 100414-008123<br>
<br>
On 2025-10-05 14:02, <a href="mailto:re-wrenches-request@lists.re-wrenches.org" target="_blank">re-wrenches-request@lists.re-wrenches.org</a> wrote:<br>
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> 1. GridBoss with Multiple FlexBoss Parallel Comms (Jason Szumlanski)<br>
> <br>
> <br>
> ----------------------------------------------------------------------<br>
> <br>
> Message: 1<br>
> Date: Sun, 5 Oct 2025 09:31:27 -0400<br>
> From: Jason Szumlanski <<a href="mailto:jason@floridasolardesigngroup.com" target="_blank">jason@floridasolardesigngroup.com</a>><br>
> To: RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org" target="_blank">re-wrenches@lists.re-wrenches.org</a>><br>
> Subject: [RE-wrenches] GridBoss with Multiple FlexBoss Parallel Comms<br>
> Message-ID:<br>
> <CAE438R_qdxegn1OxZRF+u+zE9=P1DBUJoCSAij+8EUv4LM=<a href="mailto:6eQ@mail.gmail.com" target="_blank">6eQ@mail.gmail.com</a>><br>
> Content-Type: text/plain; charset="utf-8"<br>
> <br>
> The manual seems to indicate diagrammatically that a Cat5 cable is <br>
> required<br>
> between the GridBoss and each FlexBoss inverter, but the text seems to<br>
> indicate only a single Cat5 wire is required between the GridBoss and<br>
> master FlexBoss.<br>
> <br>
> Can anyone confirm if a single Cat5 will work?<br>
> <br>
> I have a 100 foot run from the GridBoss to my inverters. I'm thinking <br>
> about<br>
> using a single Cat5 cable for comms and a CL3R cable for the RSD <br>
> connection<br>
> through the attic.<br>
> <br>
> Obviously, the included parallel cable should be used between the<br>
> inverters. I get that part.<br>
> <br>
> Jason Szumlanski<br>
> Florida Solar Design Group<br>
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