Another issue is what charge controller are you using? I know for me with Outback products I’ve had to switch from an FM 80 to the OB - FM 100 in order to have a more accurate high-voltage cut out voltage. The FM 100 has a much more accurate micro processor in it then the FM 60 or 80 per Brad Bassett with AEE.
Dana Orzel C: 208.721.7003 E- d...@solarwork.com > On Nov 19, 2022, at 7:15 AM, Jeff Clearwater via RE-wrenches > <re-wrenches@lists.re-wrenches.org> wrote: > > Hi Kris > > What voltage do you have your charge settings at? > > I recommend that bulk or absorb voltage for lithium iron phosphate not be set > above 56 V - there is no reason for it even though many manufactures suggest > higher settings. In cases where total storage is sized generously enough > I often use 55.6 or even 55.4 in order to target 95% as full instead of 100% > in order to extend cycle life. and for float there’s no reason to ever go > over 54 V and better maybe even to be in the mid-53s. > > See if that helps assuming you had it higher. > > The other thought is you have one bms that is perhaps not protecting > overcharge and allowing a temporary spike when the others do limit. > > Hope that helps! > > Best Jeff C. > Village Power Design > > > > Sent from my iPhone > >>> On Nov 19, 2022, at 6:32 AM, Kristopher Schmid via RE-wrenches >>> <re-wrenches@lists.re-wrenches.org> wrote: >>> >> >> Greetings all, >> >> I have seen an issue on two different systems that I am hoping someone can >> shed some light on for me. One was a 48 volt pack of 12 volt Battle Bornes >> and the other was a 24 volt pack of SOKs. What happens is when reaching the >> end of the bulk charging stage, the battery voltage spikes and sends the >> inverter into an overvoltage error. Can anyone explain what is happening >> and a solution? >> >> Thanks, >> Kris >> >> Shine On! >> >> Kris Schmid >> Legacy Solar, LLC >> 137 West 1st Avenue >> Luck, WI 54853 >> www.legacysolar.com >> 715-653-4295 >> NABCEP Certified PV Installation Professional >> Licensed Wisconsin Master Electrician >> BSEE >> _______________________________________________ >> 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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