Mac, my advice, just to be sure, check the refractometer against a float hydrometer on real battery acid from your home system, not just the the distilled water zero mark.
Dan Fink Buckville Energy Otherpower NABCEP / IREC / ISPQ accredited Continuing Education Providers 970.672.4342 On Tue, Aug 12, 2014 at 9:01 PM, Mac Lewis <[email protected]> wrote: > Thanks for the responses everyone. I never considered that acid may have > been added. I'll have to press him a little bit on that. He's definitely > "old school" so I wouldn't be surprised if he tried this. Dan, I > calibrated the refractometer, so I have confidence in its readings. When I > say all over the place, we had 3 cells of specific gravity of 1.0, the rest > ranged from 1.24-1.33. He is going to equalize again, but we will see if > he added acid. > > Thanks again. > > > On Tue, Aug 12, 2014 at 8:13 PM, William Miller <[email protected]> > wrote: > >> Mac: >> >> Someone has added acid to the cells. I've had the same experience and >> found out the truth later on. >> >> William >> >> Miller Solar >> >> On Aug 12, 2014, at 6:54 PM, Mac Lewis <[email protected]> wrote: >> >> Hello wrenches, >> >> I just went on a service call for a new client. He had a bank of 4 year >> old Interstate L16HCL batteries, 2 strings of 8, 48V system, 840Ahr. We >> went through the batteries and got specific gravity on all of the cells >> post-equalization. I was a bit surprised to see some very high numbers ie >> over 1.32 for the specific gravities (higher than my refractometer goes). >> The specific gravities were all over the place, but I haven't seen numbers >> this high. I don't have a great explanation. He has a stacked 3648 VFX >> Outback system, and the set-points were 58.8V Absorb for 2 hours, and 62V >> Equalize for 2 hours. He has a decent amount of solar (about 3400W) and a >> 1000W wind generator. >> >> Any ideas why the specific gravity is so high on some cells? Also, is >> there anything wrong with having SG this high, post-equalization? For this >> very standard battery, what settings do you go with (Bulk, Absorb, Float, >> Eq, and times for Abs and Equalization). >> >> Thanks in advance >> >> >> >> -- >> >> >> >> Mac >> >> >> _______________________________________________ >> List sponsored by Redwood Alliance >> >> List Address: [email protected] >> >> Change listserver email address & settings: >> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >> >> List-Archive: >> http://www.mail-archive.com/[email protected]/maillist.html >> >> List rules & etiquette: >> www.re-wrenches.org/etiquette.htm >> >> Check out or update participant bios: >> www.members.re-wrenches.org >> >> >> > > > -- > > > > Mac Lewis > > * "Yo solo sé que no sé nada." -Sócrates * > > _______________________________________________ > List sponsored by Redwood Alliance > > List Address: [email protected] > > Change listserver email address & settings: > http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org > > List-Archive: > http://www.mail-archive.com/[email protected]/maillist.html > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org > > >
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