http://batteryuniversity.com/learn/article/water_loss_acid_stratification_and_surface_charge
Battery university claims it happens when you're below 80% charge.
Seems to support Chuck's argument.
And yeah, AGM is said to not stratify at all. That's why they last
longer.
------ Original Message ------
From: "Chuck McCown" <ch...@wbmfg.com>
To: af@afmug.com
Sent: 10/16/2017 12:27:33 PM
Subject: Re: [AFMUG] Batt Prices
OK, so why is that not a problem for large telco flooded cells? We
never had any bubbles.
Do an equalization charge maybe once a year.
-----Original Message----- From: Robert
Sent: Monday, October 16, 2017 10:25 AM
To: af@afmug.com
Subject: Re: [AFMUG] Batt Prices
Statification of the acid... Eventually the denser fluid will pool at
the bottom if not agitated. Bubble generation is necessary for
agitation...
On 10/16/17 6:07 AM, Chuck McCown wrote:
I wonder why you need to exercise them when you don’t on the large
stationary batts that are made for float duty. I know Ni-Cds generate
a memory and need to be exercised, but have not heard of this on lead
acid before.
If this is a thing, the valre-eltek rectifier with the BC-2000 card
can be set to automatically do a scheduled load test pretty much of
any schedule you can think of.
*From:* Harold Bledsoe
*Sent:* Monday, October 16, 2017 10:04 AM
*To:* af@afmug.com
*Subject:* Re: [AFMUG] Batt Prices
A hybrid deep cycle marine battery is good for around 80-100 cycles.
For backup purposes it can work but keep in mind that you still need
to exercise the battery at least 1-2 times per month. Perma-float
will kill it if doesn't cycle occasionally. Still as a backup-only
you can get 5 years from it. 10-15 years is OK from a real deep cycle
battery.
If you want a lot of backup capacity, look at a forklift battery. If
you can handle the logistics (weight) it is really good cost overall
and good for 15-20 years. They just weigh a ton (literally).
-Hal
On Mon, Oct 16, 2017 at 7:46 AM Adam Moffett <dmmoff...@gmail.com>
wrote:
compare Wh / pound if you want to catch the liars.
If I look at a bunch of 100ah batteries, and one of them is 10
pounds
less than the others, then i believe that one is optimistically
interpreting a test result.
------ Original Message ------
From: ch...@wbmfg.com
To: af@afmug.com
Sent: 10/14/2017 4:57:32 PM
Subject: Re: [AFMUG] Batt Prices
>Lead, acid.
>Not in a moving vehicle, in an temperature controlled space.
>Not cycled.
>Float operation.
>
>I think that even if they were cheap crap, they might do OK.
>
>
>-----Original Message----- From: Robert
>Sent: Saturday, October 14, 2017 2:31 PM
>To: af@afmug.com
>Subject: Re: [AFMUG] Batt Prices
>
>So is there something about these batteries that gives you a good
>feeling as to actual quality beyond the marketing blurb with the
>product? I only have the pure weight to be an independent judge
right
>now.
>
>On 10/14/17 1:14 PM, Bill Prince wrote:
>>Sho-nuff
>>
>>
>>bp
>><part15sbs{at}gmail{dot}com>
>>
>>On 10/14/2017 1:13 PM, ch...@wbmfg.com wrote:
>>>Yeahbut, I had to do some manual screen scraping and data
entry.�
>>>So I was a bit lazy.� And since I really don�t care about
>>>physical specs (being a cheap ass) that is all I did.� So,
yeah, I
>>>can.� Do you want the spread sheet?� Winking smile
>>>�
>>>*From:* Bill Prince
>>>*Sent:* Saturday, October 14, 2017 2:12 PM
>>>*To:* af@afmug.com
>>>*Subject:* Re: [AFMUG] Batt Prices
>>>�
>>>
>>>Can you add column(s) for group size and weight?
>>>
>>>�
>>>
>>>bp
>>><part15sbs{at}gmail{dot}com>
>>>
>>>On 10/14/2017 12:55 PM, ch...@wbmfg.com wrote:
>>>>My list so far.� Price per watt hour is based on the 100
hour
>>>>discharge rate.�
>>>
>>
