The FLIR is nice but SG and voltage would have told the same thing, would it not? I have excellent experience with the L16 2V cells but will be switching to the LG RESU 10 very soon for my clients.
> Here's a thermal image from a recent inspection of 2 v Trojan L16REs. > Notice the normal batteries above and below, they are cool blue, running > around 75F > > 2 of the cells of the center battery are obviously shorted. Cell > voltage was 2.07 v compared to about 2.3 to 2.4 v for surrounding good > batteries. Dead cells are much easier to find on 6 v batteries. I > wouldn't have found this without the Flir 167. > > About 1/4 of the batteries in this set had hot cells; 25 -30 deg F > warmer. Obviously time for some fresh lead. Owner couldn't recall how > old the set was, he thought 2 to 4 years. Rated at 1000 cycles to 80% > DOD, these Trojan RE batteries should do much better than that. I have > never been impressed with L16s anyway. John, my experience has also > been: higher Capacity = more premature cell failures. > > R. Ray Walters > Chief Technical Officer, RemoteSolar.com > BS Mech Engineering, 1988 > Former NABCEP Certified, 2004-2016 > Licensed Master ELectrician, Colorado > 303 505-8760 > > On 4/26/17 2:09 PM, John Blittersdorf wrote: >> Wallace, >> I installed some Interstate RE batteries (green case) L16's that >> supposedly are made by US Battery. As with Trojan and other High >> Capacity L16's I had several cell failures. I have always felt that >> gleaning more amp hours from the same box must lead to cutting corners >> on robustness. I have found that often when the batteries are full, >> they work OK for awhile but as the voltage drops and the current flow >> rises, the cell will eventually drop out. Other adjacent batteries in >> the string often overcharge to compensate. In my case with the green >> batteries, they were about 2 years old as well. I took them back to >> my distributor and replaced them with standard L16's at a special pro >> rated price. I have found that all lead acid batteries that have >> problems seem to first have a cell failure somewhere along the line >> and finally the capacity diminishes to the point that it is an >> annoyance. Seems bad cells seem more numerous lately. >> >> John Blittersdorf >> Rob Stubbins Solar >> >> >> On Wed, Apr 26, 2017 at 11:54 AM, Wallace Stahle <wsta...@pacific.net >> <mailto:wsta...@pacific.net>> wrote: >> >> Hi Folks, >> >> I was called by a customer with the complaint of the MS4024 >> inverter shut down and ME-ARC controller and Trimetric acting >> strange, intermittent and even even showing 29 volts at times. >> >> The batteries are four 2.5 year old US battery L16XC 380 AH and >> checking each battery showed one at 4.8 v under charge while the >> other three were at 7+ volts and no current. >> >> Meanwhile the specific gravity was high on all cells and even a >> week after removal are up at 1.275 on all three cells. >> >> I suspect an open in the cell interconnects with enough continuity >> to read volts but not conduct current. >> >> My question is what have any of you seen n this regard and any >> knowledge of cause of such a failure. >> >> Your insights and experience are greatly appreciated. >> >> They were installed by others and are out of warranty. I donated a >> serviceable used USB L16 to get her back to a working system. >> She did recall her Ex stating along the lines of "oh this one has >> a problem but dont worry, it'll come around" as they were installed. >> >> Many thanks, >> >> Wallace Stahle >> Future Electric Energy Co >> P O Box 236 >> Willits, CA 95490 >> fut...@pacific.net <mailto:fut...@pacific.net> >> CA Lic.# C10-762093 >> 707-459-0474 <tel:707-459-0474> >> >> >> >> >> _______________________________________________ >> List sponsored by Redwood Alliance >> >> List Address: RE-wrenches@lists.re-wrenches.org >> <mailto:RE-wrenches@lists.re-wrenches.org> >> >> Change listserver email address & settings: >> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org >> <http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org> >> >> List-Archive: >> >> http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html >> >> <http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html> >> >> List rules & etiquette: >> www.re-wrenches.org/etiquette.htm >> <http://www.re-wrenches.org/etiquette.htm> >> >> Check out or update participant bios: >> www.members.re-wrenches.org <http://www.members.re-wrenches.org> >> >> >> >> >> _______________________________________________ >> List sponsored by Redwood Alliance >> >> 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 >> >> List-Archive: >> http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html >> >> List rules & etiquette: >> www.re-wrenches.org/etiquette.htm >> >> Check out or update participant bios: >> www.members.re-wrenches.org >> > > _______________________________________________ > List sponsored by Redwood Alliance > > 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 > > List-Archive: > http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html > > List rules & etiquette: > www.re-wrenches.org/etiquette.htm > > Check out or update participant bios: > www.members.re-wrenches.org > > Dave Angelini Offgrid Solar "we go where powerlines don't" http://members.sti.net/offgridsolar/ e-mail offgridso...@sti.net text 209 813 0060 _______________________________________________ List sponsored by Redwood Alliance 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 List-Archive: http://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/maillist.html List rules & etiquette: www.re-wrenches.org/etiquette.htm Check out or update participant bios: www.members.re-wrenches.org
