I had one stuck in silent a couple years ago. Was plain as day after some measurements that PV positive to ground showed the open circuit PV voltage. It had failed internally. A new charge controller fixed it.
*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 On Wed, Dec 11, 2024 at 2:13 PM Luke Christy via RE-wrenches < re-wrenches@lists.re-wrenches.org> wrote: > This is a timely thread. Thanks to all for your input. > > I also have a site with a problematic FM100. The system has 2x FM100s and > every morning one of them has required a manual power cycle by the client > to get it to start producing. I can get no data remotely through Optics > that indicates what’s going on other than that the device just stays in > silent mode after it shuts down at the end of the production day. I went > down some rabbit holes related to installing a fixed resistor on the BTS > sensor circuit to set the measured battery temp at 25º C vs leaving the > sensor unconnected with the lithium battery bank. There were some threads > on the NAWS forum that indicated ghost temp values from unconnected BTS > sensors might a source of the problem. I’m not sure why I didn’t think of > the AFCI card as possible cause also. Thankfully I have some spare new > FM100s on hand. Looks like a trip out there to swap the device and pull > some AFCI cards. > > I continue to be dismayed at the situation with Outback. I can’t really > see them coming back to the market in an incarnation that we will > recognize. - despite the various reports to the contrary. I hope I’m wrong. > At least (for now) they are still supporting the Optics platform. > > Luke Christy > Renewable energy consultant > > NABCEP Certified PV Installation Professional™: > > Solar Gain Services, LLC > PO Box 531 > Monte Vista, CO 81144 > 719.588.3044 > sgsrenewab...@gmail.com > > On Dec 10, 2024, at 8:50 PM, John Blittersdorf via RE-wrenches < > re-wrenches@lists.re-wrenches.org> wrote: > > HI Wrenches, > I have an off grid site on an Island on auto pilot for the winter with > no access. The FM 100 > has remained in Silent mode even when the Array Voltage is around 150 > Volts and battery at 46V > I did get a response from Outback Tech support but they couldn't figure > out what happened. > I suspect that there is a ground or arc fault error which locks it up til > manually recycled. The problem is that there is no indication found on > Optics that there is a ground fault. > We would be totally in the dark except the original small solar array with > an Apollo CC with > about a kilowatt of solar has been dribbling in enough power to keep above > low battery cutoff > for a few hours each day. The system was up when I was on the tech > support call but has since quit for the day. Has anyone seen this before? > > John Blittersdorf > > _______________________________________________ > List sponsored by Redwood Alliance > > Pay optional member dues here: http://re-wrenches.org > > List Address: RE-wrenches@lists.re-wrenches.org > > 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/re-wrenches@lists.re-wrenches.org/ > 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 > > > _______________________________________________ > List sponsored by Redwood Alliance > > Pay optional member dues here: http://re-wrenches.org > > List Address: RE-wrenches@lists.re-wrenches.org > > 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/re-wrenches@lists.re-wrenches.org/ > 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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