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
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| Subject: | 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
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| Subject: | Bringing flat AGM back from the dead |
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
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| Subject: | Re: 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
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| Subject: | Re: 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 <rparigor@hotmail.com> 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
>
>
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