<div dir="auto"><div>It's been a long time, but I'm quite certain it was landed on the Gen (AC2) input bus. It worked fine for many months, so I can't imagine this is the issue, but it's worth double checking. </div><div dir="auto"><br></div><div dir="auto">This was a prewired dual Radian system from Wholesale Solar (or whatever they're called now).</div><div dir="auto"><br></div><div dir="auto">Jason</div><div dir="auto"><br><br><div class="gmail_quote" dir="auto"><div dir="ltr" class="gmail_attr">On Tue, Nov 2, 2021, 6:41 PM Maverick Brown <<a href="mailto:maverick@mavericksolar.com">maverick@mavericksolar.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">Sounds like the generator is connected to AC Out terminals (AC coupling). This will \u2018work\u2019 to charge batteries. It will function but the Radian has no way to regulate battery voltage. One would typically install an AUX controlled AC relay on a grid tie inverter set up for AC coupling. In your case, make sure the generator is landed on the generator terminals, AC2. <div><br><div dir="ltr"><div style="color:rgb(0,0,0);font-family:Helvetica;font-size:12px"><div>Maverick Brown<br>Off-Grid Solar Commander since 2006<br><b>Maverick Solar Enterprises, Inc.</b></div><div><b> \u2022 Solar Commander Remote Power</b></div><div><b> \u2022 SunFlow Systems Cathodic Protection <br></b><a href="mailto:maverick@mavericksolar.com" target="_blank" rel="noreferrer">maverick@mavericksolar.com</a><br>512-460-9825</div><div><br></div></div></div><div dir="ltr"><br><blockquote type="cite">On Nov 2, 2021, at 3:46 PM, Jason Szumlanski <<a href="mailto:jason@floridasolardesigngroup.com" target="_blank" rel="noreferrer">jason@floridasolardesigngroup.com</a>> wrote:<br><br></blockquote></div><blockquote type="cite"><div dir="ltr">\ufeff<div dir="ltr"><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">Whoa! I just got access to his OpticsRE. It says battery voltage reached as high as 66V!!! (48V Nominal). I don't know if that's true yet or a acrtually voltage metering issue. But it appears that when the generator stops the invert mode kicks in and immediately shuts down due to high battery voltage. I guess the inverters were coming back alive when the voltage settled to the normal range. But the homeowner reports that when he manually restarts the system the battery is around 54V. I'm not sure how long after the shutdown this occurs.</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">So at this point I told him he needs to be very careful and make sure he's not cooking the batteries by testing with a volt meter during charging to see what's really going on.</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 concerned because the FNDC, both GS8048s and both FM100s all report abnormally high battery voltage. That suggest that the voltage is actually that high. But the charger setpoints are clearly set to defaults for absorb and float. I don't know why the voltage would blow past the setpoints. </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 misspoke in my initial email. He has AGS voltage start and SOC start set up. </div><div class="gmail_default" style="font-family:arial,helvetica,sans-serif"><br></div><div><div dir="ltr" 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"><br></div></b></div></div></div></div></div></div></div></div><br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, Nov 2, 2021 at 3:09 PM Jason Szumlanski <<a href="mailto:jason@floridasolardesigngroup.com" target="_blank" rel="noreferrer">jason@floridasolardesigngroup.com</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"><div dir="auto">I have a client (DIY) who has dual 8048's and he is starting the generator using both high load and low voltage settings with the AGS. It worked flawlessly for 9 months. Then for a couple of months when the generator shut down the lights would flicker. Eventually it started shutting down his loads completely for a couple of minutes and it would start back up automatically. Now when the generator shuts down the inverters shut down and need to be restarted manually. <div dir="auto"><div dir="auto"><br></div><div dir="auto">He said there is an error code but he never wrote it down.</div><div dir="auto"><br></div><div dir="auto">Any ideas given the sequence of events?</div><div dir="auto"><br></div><div dir="auto">Lead acid batteries. 20kW generator. Despite it being DIY from an online wholesaler, he did hire a licensed electrician and that electrician consulted with me a bit prior to installation, so it's a pretty good job. I'm thinking it's an internal Radian setting or fault causing this. </div><div dir="auto"><br></div><div dir="auto">Jason Szumlanski</div><div dir="auto">Florida Solar Design Group</div></div></div>
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