<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div dir="ltr"></div><div dir="ltr">I have a few out there all offgrid, so this particular issue I e not seen </div><div dir="ltr"><br></div><div dir="ltr">But I have had all sorts of weird issues that occurred long after any changes to the system. AGS was a big one. </div><div dir="ltr">After I double checked all the settings I usually resorted to a full factory reboot of everything. </div><div dir="ltr"><br></div><div dir="ltr">And that usually fixed it. </div><div dir="ltr"><br></div><div dir="ltr">Good luck</div><div dir="ltr"><br></div><div dir="ltr">Jay</div><div dir="ltr"><br></div><div dir="ltr"><br></div><div dir="ltr"><br><blockquote type="cite">On Sep 26, 2025, at 3:26 PM, scot.arey--- via RE-wrenches <re-wrenches@lists.re-wrenches.org> wrote:<br><br></blockquote></div><blockquote type="cite"><div dir="ltr">
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I don't have but two paralleled Radian systems but I removed the FNDC in those. While I REALLY want to love and use the FNDC, I feel like that gives unintended issues in more complex systems.</div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> RE-wrenches <re-wrenches-bounces@lists.re-wrenches.org> on behalf of Steve Higgins via RE-wrenches <re-wrenches@lists.re-wrenches.org><br>
<b>Sent:</b> Friday, September 26, 2025 4:01 PM<br>
<b>To:</b> RE-wrenches <re-wrenches@lists.re-wrenches.org><br>
<b>Cc:</b> Steve Higgins <steve@surrette.com><br>
<b>Subject:</b> Re: [RE-wrenches] Dual radian system stopping selling on sunny days</font>
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<div>Dave, I've had the same thing happen with a couple of systems... </div>
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<div dir="auto">Do you have the FNDC installed? </div>
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<div dir="auto">Outback wont admit it but I think that there is a software conflict between the FNDC and the radian firmware. </div>
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<div dir="auto">The only way I could get it to stay in sell mode was to remove the FNDC. </div>
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<div dir="ltr" class="x_gmail_attr">On Fri, Sep 26, 2025, 10:53 AM Dave Tedeyan via RE-wrenches <<a href="mailto:re-wrenches@lists.re-wrenches.org">re-wrenches@lists.re-wrenches.org</a>> wrote:<br>
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<div>To the Outback extraordinaires,</div>
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<div>I've got a dual radian, grid tied system that has been in service for about 9 years. Recently, it has started this behavior where it will stop selling to the grid on sunny days. Looking back at the data, this has happened intermittently and very infrequently
a couple years ago. But now we are at the point where it happens every sunny day. Once the batteries get up to fully 100% charged (not 99%), the selling stops and the system only harvests enough solar to cover the backed up loads. </div>
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<div>I got a hold of the USB card data. It appears that the inverter goes from "Sell Enabled" to "Offset" when this happens. I cannot tell whether the inverter randomly decides to switch mode and then stop selling, or whether it is the stopping selling that
puts it in "Offset" mode. The sell voltage is set at 52V, and float is set to 54.4V. It looks like the batteries are generally sitting around 54V when this happens. Once the inverter enters "offset" mode, then the battery voltage stays steady at 54.0V</div>
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<div>Does anyone have any idea what can be causing this to happen?</div>
<div>Cheers,</div>
<div>Dave </div>
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<span style="color:rgb(236,189,0)"><span style="font-weight:700">p: </span></span><span style="font-size:10pt; color:rgb(0,0,0)">he | him | his</span><span style="color:rgb(236,189,0)"><span style="font-weight:700"><br>
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NY 14850</a></span><br>
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