flooded v. sealed batteries [RE-wrenches]

[Matt Tritt]

Daryl,

They are lead-antimony. A typical size would be around 735 ah.
The weight is another thing! A 2 volt cell eighs about 120 lbs, a 12 volt
case about 590 lbs.
With the big ones, you have to be versed in the Egyptian methods for moving
stuff or have access to
mechanised equipment. Some of the larger batteries can weigh up to about
1,400 lbs. :-)
A hassle, but woth it!

Matt T
----- Original Message ----- 
From: "Darryl Thayer" <daryl_solar at yahoo.com>
To: <RE-wrenches at topica.com>
Sent: Friday, September 26, 2003 11:26 PM
Subject: RE: flooded v. sealed batteries [RE-wrenches]


> Matt
> Are your batteries lead-antinmony or Lead-calcium?
> How many AH is a typical size?  How much do they
> weight.
>
> After lugging around heavy batteries, how about
> getting single cells and assemble on site? About all I
> can handle is 800 AH cells.
> Daryl
>
> --- Matt Tritt <solarone at charter.net> wrote:
> > Marco,
> >
> > I've found over the years that regular, old
> > fashioned lead acid bat's
> > are the most forgiving - if also the most
> > inconvenient - for RE systems
> > of any appreciable size. I've migrated away from
> > L-16's to large
> > industrial steel clad types because of the far
> > greater life expectancy.
> > They are indeed a royal pain in the posterior to
> > transport, but
> > man-O-man, there's just no comparison in warranty,
> > reliability and
> > resiliancy. Cost-wise they pay off in the long run,
> > but scare many
> > buyers away with the initial outlay.
> >
> > Matt T
> >
> > -----Original Message-----
> > From: Marco [mailto:marco at pvthawaii.com]
> > Sent: Friday, September 26, 2003 7:51 PM
> > To: RE-wrenches at topica.com
> > Subject: flooded v. sealed batteries [RE-wrenches]
> >
> >
> > For off-grid applications, where do my fellow
> > Wrenches stand (or sit) on
> > the question of using L16s, say, as opposed to
> > sealed AGM or gel
> > batteries?  My hit has been that sealed batteries,
> > either AGM or gel,
> > are not a good choice for frequent and possibly deep
> > cycling.  Any of
> > you who can guide me to some on-line links or
> > literature on this issue?
> > Thanks.
> >
> > marco
> >
> > Marco Mangelsdorf
> > President
> > ProVision Technologies, Inc.
> > 69 Railroad Avenue, Suite A-7
> > Hilo, Hawaii 96720 USA
> > (808) 969-3281, fax 934-7462
> > www.provisiontechnologies.com
> >
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