Re: Home UPS recommendations

From	gene heskett <gheskett@shentel.net>
Newsgroups	linux.debian.user
Subject	Re: Home UPS recommendations
Date	2024-02-10 22:50 +0100
Message-ID	<I63ot-9ibw-3@gated-at.bofh.it> (permalink)
References	(13 earlier) <I5MdX-97YO-1@gated-at.bofh.it> <I5St3-9bOP-7@gated-at.bofh.it> <I5W3E-9dMy-13@gated-at.bofh.it> <I5XM5-9eQT-3@gated-at.bofh.it> <I60Ah-9gxU-1@gated-at.bofh.it>
Organization	linux.* mail to news gateway

Show all headers | View raw

On 2/10/24 13:40, Joe wrote:
> On Sat, 10 Feb 2024 16:45:29 +0100
> hw <hw@adminart.net> wrote:
> 
> 
>>
>> The cheap APC models seem to produce a lot more heat, and their
>> batteries don't seem to last as long.  They work and they're not
>> really a good deal.  I don't have test equipment for UPCs, but you can
>> feel how warm they get and see how cheaply they're built without
>> special equipment.
>>
> 
> It's quite surprising how many complaints about swollen UPS batteries
> there are around the Net. Given the fairly light duties of the batteries
> almost all of the time, this is pretty well certain to be caused by
> overheating due to incompetent charging. Batteries, particularly
> lead-acid types, are not exactly new technology, and the correct
> charging of them is well understood.
> 
You have an excellent view of the problem.  One of the problems with PBa 
batteries is the each one of the gender has a mind of its own, and If 
you don't fiddle with the charging circuit, you will never find the 
optimum voltage to charge that battery to.  One of the things you never 
ever want to is look into a liquid acid battery and see it bubbling. 
That indicates and overcharge, the bubbling is the disassociated 
hydrogen and oxygen of the water component of the acid, which makes the 
water go away, leaving eve stronger acid..  Two instances I can regale 
you with.

1. shortly after I became the resident engineer at KXNE in NE Nebraska 
in '69, the two big truck batteries that started the 150 kw Cummins 
standby power failed, basically burned up from over charge. Replacing 
the batteries, they boiled like crazy.  So I turn down the curent from a 
charger with a higher resistor, because it was banging over 2 amps into 
the 2 of then to get the 24 the starter needed but that was holding 
those up to around 29 volts. The next day I raised the resistor about 4x 
as they were still boiling. Wash, rinse, repeat till the trickle charge 
was down to around .005 amps.  This was all it took for a trickle charge 
for a pair of 225ah large car batteries kept clean. 8 years later I'm 
bored out of my skull and had an offer to be the Chief at a station in 
NM, offering a 175% raise so I took it. Those batteries were then 8 
years old, and still were trying to turn that 335 Cummins wrong side out 
starting it. When the weekly 15 minute exercise came up you heard the 
bendix slam into the flywheel, followed milliseconds later by the first 
bark, and 1 measly second later the lights were back on

2. While in Nebraska, it can get pretty cold, like -35F once in a while. 
I had put an ambulance alternator in my daily driver, and made a 
switching regulator for the voltage regulator but in series with the 
voltage reference zener diode, I added 4 common si rectifier diodes to 
use their negative temp effects to turn it up or down according to the 
underhood temps.  15 seconds after a -25F start, it had the battery back 
up to about 16 volts, but 20 minutes and 20 miles later it was down to 
abound 12.7 volts, and on a 105F day down to around 12.3 volts.  That 
battery was then about 7 years old, still had its original water in it, 
spun the engine faster than it idled, when the missus threw a rod. The 
only thing I didn't get a chance to salvage was that alternator, the 
missus sold it to a junk yard the next day before I had a chance to pull 
it off.

Getting to know the battery and how to treat it could bankrupt all the 
replacement battery makers. The acid SG is important, reject any battery 
whose label says SG is 1.280. buy the one that says 1.260, It will be a 
fraction of a volt lower, but treated right will actually live years 
longer. Modern gel cell's are even more quickly destroyed by over charging.

Your trivia factoid for the day, from somebody who understands the 
chemistry.
Cheers, Gene Heskett, CET.
-- 
"There are four boxes to be used in defense of liberty:
  soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author, 1940)
If we desire respect for the law, we must first make the law respectable.
  - Louis D. Brandeis

Thread

rsync --delete vs rsync --delete-after Default User <hunguponcontent@gmail.com> - 2024-01-17 17:30 +0100
  Re: rsync --delete vs rsync --delete-after David Christensen <dpchrist@holgerdanske.com> - 2024-01-17 18:30 +0100
    Re: rsync --delete vs rsync --delete-after Keith Bainbridgge <keithrbaugroups@gmail.com> - 2024-01-18 00:10 +0100
    Re: rsync --delete vs rsync --delete-after Default User <hunguponcontent@gmail.com> - 2024-01-18 02:30 +0100
      Re: rsync --delete vs rsync --delete-after David Christensen <dpchrist@holgerdanske.com> - 2024-01-18 08:40 +0100
      Re: rsync --delete vs rsync --delete-after Michael Kjörling <2695bd53d63c@ewoof.net> - 2024-01-18 12:10 +0100
        Re: rsync --delete vs rsync --delete-after <tomas@tuxteam.de> - 2024-01-18 12:20 +0100
          Re: rsync --delete vs rsync --delete-after Michael Kjörling <2695bd53d63c@ewoof.net> - 2024-01-18 12:50 +0100
      Re: rsync --delete vs rsync --delete-after Michel Verdier <mv524@free.fr> - 2024-01-18 14:00 +0100
  Re: rsync --delete vs rsync --delete-after Kushal Kumaran <kushal@locationd.net> - 2024-01-17 19:30 +0100
    Re: rsync --delete vs rsync --delete-after Default User <hunguponcontent@gmail.com> - 2024-01-17 21:00 +0100
      Re: rsync --delete vs rsync --delete-after Michael Kjörling <2695bd53d63c@ewoof.net> - 2024-01-17 21:20 +0100
      Re: rsync --delete vs rsync --delete-after Andy Smith <andy@strugglers.net> - 2024-01-17 22:00 +0100
      Re: rsync --delete vs rsync --delete-after Michel Verdier <mv524@free.fr> - 2024-01-18 02:40 +0100
      Re: rsync --delete vs rsync --delete-after hw <hw@adminart.net> - 2024-01-18 12:20 +0100
        Re: rsync --delete vs rsync --delete-after Ralph Aichinger <ra@h5.or.at> - 2024-01-18 13:50 +0100
          Re: rsync --delete vs rsync --delete-after Michael Kjörling <2695bd53d63c@ewoof.net> - 2024-01-18 14:10 +0100
            Re: rsync --delete vs rsync --delete-after Ralph Aichinger <ra@h5.or.at> - 2024-01-18 15:30 +0100
            Re: rsync --delete vs rsync --delete-after hw <hw@adminart.net> - 2024-01-26 16:40 +0100
              Re: rsync --delete vs rsync --delete-after Michael Kjörling <2695bd53d63c@ewoof.net> - 2024-01-26 17:30 +0100
                Re: rsync --delete vs rsync --delete-after hw <hw@adminart.net> - 2024-01-28 18:00 +0100
          Home UPS recommendations (Was Re: rsync --delete vs rsync  --delete-after) Andy Smith <andy@strugglers.net> - 2024-01-26 16:20 +0100
            Re: Home UPS recommendations (Was Re: rsync --delete vs rsync --delete-after) fxkl47BF@protonmail.com - 2024-01-26 16:30 +0100
            Re: Home UPS recommendations Michael Kjörling <2695bd53d63c@ewoof.net> - 2024-01-26 16:40 +0100
              Re: Home UPS recommendations Tixy <tixy@yxit.co.uk> - 2024-01-26 17:20 +0100
              Re: Home UPS recommendations "James H. H. Lampert" <jamesl@touchtonecorp.com> - 2024-01-26 17:20 +0100
            Re: Home UPS recommendations (Was Re: rsync --delete vs rsync  --delete-after) Roger Price <debian@rogerprice.org> - 2024-01-26 19:10 +0100
              Re: Home UPS recommendations (Was Re: rsync --delete vs rsync  --delete-after) David Wright <deblis@lionunicorn.co.uk> - 2024-01-26 20:50 +0100
                Re: Home UPS recommendations (Was Re: rsync --delete vs rsync  --delete-after) Roger Price <debian@rogerprice.org> - 2024-01-27 11:00 +0100
            Re: Home UPS recommendations Felix Miata <mrmazda@earthlink.net> - 2024-01-26 20:10 +0100
              Re: Home UPS recommendations ghe2001 <ghe2001@protonmail.com> - 2024-01-26 20:30 +0100
                Re: Home UPS recommendations debian-user@howorth.org.uk - 2024-01-26 21:50 +0100
            Re: Home UPS recommendations (Was Re: rsync --delete vs rsync  --delete-after) hw <hw@adminart.net> - 2024-01-28 19:00 +0100
              Re: Home UPS recommendations (Was Re: rsync --delete vs rsync  --delete-after) Andy Smith <andy@strugglers.net> - 2024-01-28 20:00 +0100
                Re: Home UPS recommendations (Was Re: rsync --delete vs  rsync--delete-after) gene heskett <gheskett@shentel.net> - 2024-01-29 07:00 +0100
                Re: Home UPS recommendations (Was Re: rsync --delete vs rsync  --delete-after) Andy Smith <andy@strugglers.net> - 2024-02-08 16:30 +0100
                Re: Home UPS recommendations (Was Re: rsync --delete vs rsync  --delete-after) Charles Curley <charlescurley@charlescurley.com> - 2024-02-08 17:30 +0100
                Re: Home UPS recommendations (Was Re: rsync --delete vs rsync  --delete-after) Curt <curty@free.fr> - 2024-02-08 17:40 +0100
                Re: Home UPS recommendations Michael Kjörling <2695bd53d63c@ewoof.net> - 2024-02-08 18:00 +0100
                Re: Home UPS recommendations (Was Re: rsync --delete vs rsync  --delete-after) hw <hw@adminart.net> - 2024-02-09 12:10 +0100
                Re: Home UPS recommendations (Was Re: rsync --delete vs rsync  --delete-after) Dan Ritter <dsr@randomstring.org> - 2024-02-09 13:10 +0100
                Re: Home UPS recommendations (Was Re: rsync --delete vs rsync  --delete-after) hw <hw@adminart.net> - 2024-02-09 22:40 +0100
                Re: Home UPS recommendations (Was Re: rsync --delete vs rsync  --delete-after) Dan Ritter <dsr@randomstring.org> - 2024-02-09 23:30 +0100
                Re: Home UPS recommendations (Was Re: rsync --delete vs rsync --delete-after) "Roy J. Tellason, Sr." <roy@rtellason.com> - 2024-02-09 17:40 +0100
                Re: Home UPS recommendations (Was Re: rsync --delete vs rsync --delete-after) Stefan Monnier <monnier@iro.umontreal.ca> - 2024-02-09 18:20 +0100
                Re: Home UPS recommendations Felix Miata <mrmazda@earthlink.net> - 2024-02-10 01:10 +0100
                Re: Home UPS recommendations (Was Re: rsync --delete vs rsync  --delete-after) hw <hw@adminart.net> - 2024-02-09 22:50 +0100
                Re: Home UPS recommendations (Was Re: rsync --delete vs rsync --delete-after) "Roy J. Tellason, Sr." <roy@rtellason.com> - 2024-02-11 19:10 +0100
                Re: Home UPS recommendations Felix Miata <mrmazda@earthlink.net> - 2024-02-09 18:20 +0100
                Re: Home UPS recommendations debian-user@howorth.org.uk - 2024-02-09 21:40 +0100
                Re: Home UPS recommendations hw <hw@adminart.net> - 2024-02-09 22:50 +0100
                Re: Home UPS recommendations Felix Miata <mrmazda@earthlink.net> - 2024-02-10 01:00 +0100
                Re: Home UPS recommendations hw <hw@adminart.net> - 2024-02-10 03:20 +0100
                Re: Home UPS recommendations Felix Miata <mrmazda@earthlink.net> - 2024-02-10 04:30 +0100
                Re: Home UPS recommendations hw <hw@adminart.net> - 2024-02-10 11:10 +0100
                Re: Home UPS recommendations Felix Miata <mrmazda@earthlink.net> - 2024-02-10 15:00 +0100
                Re: Home UPS recommendations hw <hw@adminart.net> - 2024-02-10 16:50 +0100
                Re: Home UPS recommendations Joe <joe@jretrading.com> - 2024-02-10 19:50 +0100
                Re: Home UPS recommendations gene heskett <gheskett@shentel.net> - 2024-02-10 22:50 +0100
                Re: Home UPS recommendations hw <hw@adminart.net> - 2024-02-11 02:00 +0100
          Re: rsync --delete vs rsync --delete-after hw <hw@adminart.net> - 2024-01-26 16:20 +0100
            Re: Data and hardware protection measures; was: rsync --delete vs  rsync --delete-after Michael Kjörling <2695bd53d63c@ewoof.net> - 2024-01-26 17:00 +0100
              Re: Data and hardware protection measures; was: rsync --delete vs  rsync --delete-after hw <hw@adminart.net> - 2024-01-28 19:30 +0100
                Re: Data and hardware protection measures Michael Kjörling <2695bd53d63c@ewoof.net> - 2024-01-28 20:30 +0100
                Re: Data and hardware protection measures Felix Miata <mrmazda@earthlink.net> - 2024-01-28 21:50 +0100
            Re: rsync --delete vs rsync --delete-after Ralph Aichinger <ra@h5.or.at> - 2024-01-27 14:10 +0100
  Re: rsync --delete vs rsync --delete-after Stefan Monnier <monnier@iro.umontreal.ca> - 2024-01-18 05:20 +0100
    Re: rsync --delete vs rsync --delete-after Andy Smith <andy@strugglers.net> - 2024-01-18 15:40 +0100
      Re: rsync --delete vs rsync --delete-after Stefan Monnier <monnier@iro.umontreal.ca> - 2024-01-18 16:10 +0100
      Re: rsync --delete vs rsync --delete-after Michel Verdier <mv524@free.fr> - 2024-01-18 22:10 +0100
        Re: rsync --delete vs rsync --delete-after Andy Smith <andy@strugglers.net> - 2024-01-18 22:50 +0100
          Re: rsync --delete vs rsync --delete-after Default User <hunguponcontent@gmail.com> - 2024-01-19 03:40 +0100
          Re: rsync --delete vs rsync --delete-after Michel Verdier <mv524@free.fr> - 2024-01-19 08:10 +0100

csiph-web