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.� > >>> > >> > >