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.�
> >>>
> >>
>
>

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