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I had a similar problem a while back and it turned out to be the FNDC calling the shots.. Unplug the FNDC (if you’re using one).. see what happens.
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<blockquote type="cite">On Aug 18, 2024, at 1:12 PM, Kirk Herander via RE-wrenches <re-wrenches@lists.re-wrenches.org> wrote:<br>
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<div>Hello All,<br>
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<div>I have a Radian 8048 system in service for over 10 years now. It sold back quite normally until the last several months -3.- FM60 CC's are set to grid tie mode and viewable and programmed from the Mate3s / OpticsRE. This issue loosely correlates to replacing
one of the CCs several months ago.</div>
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<div>Trouble is all -3- charge controllers are almost always in a float mode. The radian does sell, but at a small KW compared to what it used to before the frequent float mode started popping up. If I remember correctly, ideally the CCs should always be in
bulk charge when sellback occurs.</div>
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<div>I have the CC and inverter charger float set to about 1 vdc higher then the inverter's sell volts, as I believe was recommended way back when. Hard to understand what changed, but something did. I've checked the relevant setpoints many times and can't
find anything obviously amiss.</div>
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<div>Does a sell mode tech note paper exist still for the Radian system? Did it ever? Any ideas would be greatly appreciated.</div>
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<span style="font-size:10pt"><a name="SignatureSanitizer__MailAutoSig"><b>Kirk Herander / </b></a><b><a href="mailto:kirkh@vermont.solar" title="Send an email to kirkh@vermont.solar; Send an email to kirkh@vermont.solar" style="color:blue" target="_blank">kirkh@vermont.solar</a></b></span></p>
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