Hello All, . 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.
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. 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. Does a sell mode tech note paper exist still for the Radian system? Did it ever? Any ideas would be greatly appreciated. -- *Kirk Herander / **kirkh@vermont.solar <kirkh@vermont.solar>* *Owner|Principal, VT Solar, LLC* *Celebrating our 33st Anniversary 1991-2024!!* dba Vermont Solar Engineering 802.559.1225
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