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 >
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