---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Mon 10/16/23: 4 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 09:21 AM - Promised data on YONHAN 8A charger performance (Robert L. Nuckolls, III) 2. 04:42 PM - Bringing flat AGM back from the dead (rparigoris) 3. 07:03 PM - Re: Promised data on YONHAN 8A charger performance (skywagon185guy) 4. 08:28 PM - Re: Bringing flat AGM back from the dead (skywagon185guy) ________________________________ Message 1 _____________________________________ Time: 09:21:03 AM PST US From: "Robert L. Nuckolls, III" Subject: AeroElectric-List: Promised data on YONHAN 8A charger performance Got a chance to organize and annotate the charging plots I gathered on the YONHAN 8A charger we discussed her on the List a few weeks ago: http://aeroelectric.com/Pictures/Battery_Chargers/YONHAN_8A_Charger-Maintainer/ A the data suggests, this product is a well-behaved charger maintainer. The 'pulse-repair' tap-dance is readily observable even if its effectiveness is not rigorously documented. There's no reason at this time to believe it to be harmful or helpful. Therefore other behaviors are of sound principal and compared to some of our favorite legacy maintainers) of excellent value. I'll be phasing out my collection of 'wall-wart' charger-maintainers to locals for continued service on their vehicles. I'll be replacing them with this (or similar) offerings. Bob . . . //// (o o) ===========o00o=(_)=o00o======== < Go ahead, make my day . . . > < show me where I'm wrong. > ================================ In the interest of creative evolution of the-best-we-know-how-to-do based on physics and good practice. ________________________________ Message 2 _____________________________________ Time: 04:42:42 PM PST US Subject: AeroElectric-List: Bringing flat AGM back from the dead From: "rparigoris" Hi Group Figured would mention how we brought back four 12 volt 100 amp AGM batteries from the dead. They are being used on a Solar System. About 6 months old. Anyway the charge controller decided to fail and stopped all charging and put a load on batteries. They were flat for about 3 weeks: two reading 5.2 volts and the other two were at 5.5 volts. I have a 4 station 750mA Battery Tender. The two 5.2 volters wouldn't take a charge, used a 2 amp charger for about 4 hours, then put on the Battery Tender. The two 5.5 volters started taking a charge right away. Note: For the first day they were only taking 150mA to begin with, then after 6 hours went up to 350mA. After a week all peaked and were floating. Then put a 10 amp load for 2 hours and charged with a 10 amp charger for 2 hours and put on the Battery Tender till Float. Then put a 10 amp load for 4 hours, then a 10 amp charger for 4 hours and put the Battery Tender till float. Just checked with a load tester and they seem OK. Put on Battery Tender and they are all floating now. Looks like the Scrap Yard won't get these 4 examples, but they will be getting their hands on the charge controller. Ron Read this topic online here: http://forums.matronics.com/viewtopic.php?p=511609#511609 ________________________________ Message 3 _____________________________________ Time: 07:03:57 PM PST US From: skywagon185guy Subject: Re: AeroElectric-List: Promised data on YONHAN 8A charger performance Bob, Thanks for the details on this charger/maintainer. It's always great to have real data results. It would be very nice if there was some way to verify if the pulse phase is or can do any real improvements in the cells. D On Mon, Oct 16, 2023 at 9:24=AFAM Robert L. Nuckolls, III < nuckolls.bob@aeroelectric.com> wrote: > Got a chance to organize and annotate the charging > plots I gathered on the YONHAN 8A charger we discussed > her on the List a few weeks ago: > > > http://aeroelectric.com/Pictures/Battery_Chargers/YONHAN_8A_Charger-Maint ainer/ > > > A the data suggests, this product is a well-behaved > charger maintainer. The 'pulse-repair' tap-dance > is readily observable even if its effectiveness is > not rigorously documented. There's no reason at this > time to believe it to be harmful or helpful. Therefore > other behaviors are of sound principal and compared > to some of our favorite legacy maintainers) of > excellent value. > > I'll be phasing out my collection of 'wall-wart' > charger-maintainers to locals for continued service > on their vehicles. I'll be replacing them with > this (or similar) offerings. > > Bob . . . > > //// > (o o) > ===========o00o=(_)=o00o====== == > < Go ahead, make my day . . . > > < show me where I'm wrong. > > ======================= ========= > > In the interest of creative evolution > of the-best-we-know-how-to-do based > on physics and good practice. > ________________________________ Message 4 _____________________________________ Time: 08:28:54 PM PST US From: skywagon185guy Subject: Re: AeroElectric-List: Bringing flat AGM back from the dead Ron, Good report and results... It would be interesting if they still have their full AH rating after reviving from the dead. Battery Tenders... I use a lot of them. One nasty problem: If the wall power fails, i.e. GFI trips and you don't reset it, the BT's will take the battery back down to the dead zone as they usually don't have a blocking diode as part of the charging output. Dave On Mon, Oct 16, 2023 at 4:42=AFPM rparigoris w rote: > rparigor@hotmail.com> > > Hi Group > Figured would mention how we brought back four 12 volt 100 amp AGM > batteries from the dead. They are being used on a Solar System. About 6 > months old. Anyway the charge controller decided to fail and stopped all > charging and put a load on batteries. They were flat for about 3 weeks: t wo > reading 5.2 volts and the other two were at 5.5 volts. > I have a 4 station 750mA Battery Tender. > The two 5.2 volters wouldn't take a charge, used a 2 amp charger for abou t > 4 hours, then put on the Battery Tender. The two 5.5 volters started taki ng > a charge right away. Note: For the first day they were only taking 150mA > to begin with, then after 6 hours went up to 350mA. > After a week all peaked and were floating. > Then put a 10 amp load for 2 hours and charged with a 10 amp charger for 2 > hours and put on the Battery Tender till Float. > Then put a 10 amp load for 4 hours, then a 10 amp charger for 4 hours and > put the Battery Tender till float. > Just checked with a load tester and they seem OK. Put on Battery Tender > and they are all floating now. > Looks like the Scrap Yard won't get these 4 examples, but they will be > getting their hands on the charge controller. > Ron > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=511609#511609 > > =========== =========== =========== =========== =========== > > ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message aeroelectric-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/AeroElectric-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/aeroelectric-list Browse Digests http://www.matronics.com/digest/aeroelectric-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.