Solved the problem. Somehow the "sell current limit" in the grid interface protection menu, a hidden menu only accessed by creating a new installer login code, was set to 7.5 a.
I reset it to the max of 30a, and the system sells normally again. I read on an outback forum this parameter can change as a result of a GS8048 firmware upgrade. Go figure. On Sun, Aug 18, 2024 at 1:11 PM Kirk Herander <kirkh@vermont.solar> wrote: > 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 > -- *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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