<div dir="auto"><div><div>I forgot to mention, I suspect that the Insight configuration might be overriding changes I made with the SCP. I'm going to try to change the nominal voltage with the local Insight interface today. </div><div dir="auto"><br></div><div dir="auto">I still don't understand why the XWs are reporting the fault. Maybe that's just the way the Xanbus network works - any MPPT can report to the XW that the DC bus is high. </div><div><br></div><div data-smartmail="gmail_signature"><div dir="ltr"><br>Jason<div><br></div></div></div><br><div class="gmail_quote gmail_quote_container"><div dir="ltr" class="gmail_attr">On Tue, Jan 13, 2026, 7:29 AM Jason Szumlanski <<a href="mailto:jason@floridasolardesigngroup.com">jason@floridasolardesigngroup.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="auto"><div>I have a new client with an existing Schneider dual XW Pro system with four MPPT 100 and two MPPT 60 charge controllers. They have a SCP, AGS, and Insight. </div><div dir="auto"><br></div><div dir="auto">The system is reporting DC over voltage faults on the two inverters (viewable via SCP. The battery voltage is not high. It's a bank of EG4 LL batteries that would hit their high battery cutoff well before the XW detects a high battery condition.</div><div dir="auto"><br></div><div dir="auto">I went through all of the setting and discovered that the two MPPT 60 were set to a nominal voltage of 36V. I fixed that by changing them to 48V and cleared the faults and all was well. I did this though the SCP.</div><div dir="auto"><br></div><div dir="auto">By the time I came home, however, the faults returned and the MPPT 60 both reverted to 36V nominal. </div><div dir="auto"><br></div><div dir="auto">I'm not sure why the DC over voltage faults are showing up on the XWs, but it seems related to the nominal voltage issue on the MPPT 60s.</div><div dir="auto"><br></div><div dir="auto">Any ideas?</div><div dir="auto"><br></div><div dir="auto">Schneider tech support has me wasting time today going for a boat ride to the site to put a meter on the battery terminals, when I know it's obviously not an actual battery voltage issue. I'm hoping to steer them in a different direction. </div><div dir="auto"><br></div><div dir="auto"><br></div><div dir="auto">Jason Szumlanski </div><div dir="auto">Florida Solar Design Group </div><div dir="auto"><br></div><div data-smartmail="gmail_signature"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><b><div style="text-align:center"><table border="0" cellpadding="0" cellspacing="0" style="color:rgb(34,34,34);font-weight:400;text-align:start;font-family:"helvetica neue",helvetica,arial,sans-serif"><tbody></tbody></table></div></b></div></div></div></div></div></div></div></div>
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