Here is how I’d start. Only 1 set of shunts can be used. 1. calibrate all devices to the same voltage which is the FNDC. 2. calibrate the FNDC if needed 3. set amp hrs to 1600. I always use the actual amount. 4. charged voltage to 55.4v 5. assuming you have some absorb time for the batteries time to 1 minute 6. return amps set to some higher number to start, say 50. 7. charge factor 98% 8. don’t use charge termination control
Like with any battery some tweaking might be involved with some of the settings to be close to the built in BMS. But since you have optics that’ll make it easier. These numbers have worked pretty well for me in the past. But never used the Iron Edison batteries. > On Sep 22, 2026, at 3:40 PM, All Solar <[email protected]> wrote: > > So for those that still use the FNDC, how should it be set up for accurate > SOC readout? > Here’s what’s installed: > 8ea- 200Ah Lithium 16 cell 48v nominal > 2ea- RADIAN 8048A Inverter each with its own set of 3 shunts pre wired in a > GSLC > Absorb set at 55.4 for the CCs per Iron Edison > > it’s on opticsRE if anyone would like temp access to check it out! > > Regards, > > Jeremy Rodriguez > All Solar Inc. > Penrose CO > 719-276-4954 > >> >> Pay optional member dues here: http://re-wrenches.org >> <http://re-wrenches.org/> >> >> List Address: [email protected] >> <mailto:[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 <http://www.members.re-wrenches.org/> > _______________________________________________ > List sponsored by Redwood Alliance > > Pay optional member dues here: http://re-wrenches.org > <http://re-wrenches.org/> > > List Address: [email protected] > <mailto:[email protected]> > > Change listserver email address & settings: > https://lists.re-wrenches.org/mailman/options/re-wrenches_lists.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]/ > https://lists.re-wrenches.org/pipermail/re-wrenches_lists.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 <http://www.members.re-wrenches.org/>
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