You're observing this on all three controllers or is the reduced sell back off by a factor that would correlate to the newest controller you swapped?
Did you calibrate the new controller while the PV breakers were all off? I still come across new FM80's that require utilizing the entire .5vdc margin to match my Fluke. Though it's not a solution can you temporarily raise the bulk setpoints of all three to verify expected outputs? It does seem like there was a document on proper sell back settings somewhere. Good luck, Nick On Sun, Aug 18, 2024 at 10:11 AM Kirk Herander via RE-wrenches < [email protected]> 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 / **[email protected] <[email protected]>* > > *Owner|Principal, VT Solar, LLC* > > *Celebrating our 33st Anniversary 1991-2024!!* > > dba Vermont Solar Engineering > > 802.559.1225 > _______________________________________________ > List sponsored by Redwood Alliance > > Pay optional member dues here: http://re-wrenches.org > > List Address: [email protected] > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > There are two list archives for searching. When one doesn't work, try the > other: > https://www.mail-archive.com/[email protected]/ > http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org > > List rules & etiquette: > http://www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > http://www.members.re-wrenches.org > >
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