Hi Jeff If it’s the energy cell xlc from Outback then it shows an eq requirement.
If not that battery, most industrial quality VRLA I’ve seen have a eq requirement, conditioning charge or something similar. And the lowering of capacity is common from experience. Question What equipment/brand is charging it? Jay Peltz power > On Jul 14, 2021, at 1:49 PM, Jeff Clearwater <[email protected]> > wrote: > > Thanks Dave - yes I've done whole pack load testing. The deal with this > pack though is that it is so remote and the expense of "just replace the > pack" in terms of shipping and labor is extreme - (tiny Bahaman island with > only regular small boat access} > > And if it was toward the end of the pack's life anyway I'd not mess around - > but with only 600 well documented cylces on a $25K pack - and with probably > half that again in shipping and labor to replace - I'm needing to carefully > document the lagging cells for either a warranty claim or at least to make > good decisions going forward. > > It's easy to access the cells as this is an EnergyCell AGM stack with easily > accessible terminals and removable terminal bars. > > If we replace we'd go LFP - on the order of 100 KWHrs. So no small decision > for the customer - so worth the testing. > > Thanks! > > Jeff Clearwater > Village Power Design > www.villagepowerdesign.com > > > >> Dave Angelini Offgrid Solar July 14, 2021 at 10:32 AM >> I can ask my battery guy! He is the best with AGM and a dealer for full >> river and concord. He does this alot! Saves a bunch. He always says that >> most of the warranty is just a full/corrective charge and 80% are good. >> Undercharging is the problem. Very very few are overcharged. His words! I >> just replace the bank, no time to play with this stuff. >> >> However, I just do the same thing I do with any bank of individual >> batteries. I put a large load on the bank with the inverter and look at each >> cells voltage. You may have done this... >> >> The hard part is, depending on the make, is pulling the cell and doing a >> full charge and EQ if it is the make that allows it. >> >> The other hard part is just getting batteries these days. I just heard >> Trojan is 8+ months out. You know what Steve from RollsSurrette has said. 8 >> weeks I think. >> >> The easy part, what make is your cell? >> >> >> Dave Angelini Offgrid Solar >> "we go where powerlines don't" >> http://members.sti.net/offgridsolar/ >> e-mail [email protected] >> text 209 813 0060 >> On Wed, 14 Jul 2021 10:16:31 -0700, Jeff Clearwater >> <[email protected]> wrote: >> >> Jeff Clearwater July 14, 2021 at 10:16 AM >> Hey Good Folks, >> >> I've got a 2300 AH AGM pack of 2 Volt cells that is showing signs of >> premature aging (only 600 cycles) and I need to test the AH capacity of each >> cell to help the customer make decisions going forward of whether to replace >> individual lagging cells or the whole pack. >> >> What equipment have folks used to do AHour tests on 2 Volt 2300 AH cells? >> I've done plenty of load testing on 6, 12, 24 and 48 volt packs as a whole >> but am not sure what's my best approach is for 2 volt individual tests. >> >> I know I could put a resistance load and then use an AHour integrator unit >> - but does anyone know of what unit and what resistive load I'd use at 2 >> volts? That would be a large device at that voltage to get any appreciative >> wattage! - I'd like to do a 10 hour test at most. >> >> I see 2 V test units on the web but they only appear to be hooked up for a >> small amount of time - so they can't be testing full to empty discharge >> AHours. >> >> Thanks! >> >> Jeff Clearwater >> Village Power Design >> www.villagepowerdesign.com >> >> >> _______________________________________________ >> 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 >> > > _______________________________________________ > 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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