Battery Cycle Life Ratings [RE-wrenches]
Drake Chamberlin
solar at ecoisp.com
Sun Oct 31 19:31:52 PST 2004
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One bank was, and one was not.
At 06:55 PM 10/31/2004 -0800, you wrote:
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> Drake,
>
> These must have been Trojan HCs, right?
>
> Matt T
> ----- Original Message ----- From: "Drake Chamberlin" <solar at ecoisp.com>
> To: <RE-wrenches at topica.com>
> Sent: Sunday, October 31, 2004 3:31 PM
> Subject: Re: Battery Cycle Life Ratings [RE-wrenches]
>
>
>
>
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> At 12:01 PM 10/31/2004 -0800, you wrote:
> >
> >
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> >
> >Drake,
> >
> >What kind of cycle DOD do your customers put these cells through? I am very
> >curious why my experience would be so radically different from yours.
>
> Two recent systems that I serviced with dead L 16s were Y2K systems that
> were not really used,
>
> One person did cycle his down once a month. I believe he went down 50% of
> the theoretical amp hours.
>
> I think that is both cases, an individual battery would go bad in the
> series sets and then take the rest with it. If closer track of the
> batteries were kept, likely a majority of the bank would have lasted longer
> by replacing a few batteries. In one case we tried to revive the bank
> with EDTA. It did bring over half the batteries up to barely usable.
>
> >One negative of smaller amp hour batteries means more paralleled series
> >strings,
> >which can also lead to difficulties.
>
> True. I have used bus bars, which might be the answer. Bigger batteries
> for big banks is certainly the way to go.
>
> Drake
>
>
> >Todd
> >
> >
> >
> >Drake Chamberlin wrote:
> >
> > > My experience supports the superiority of golf cart batteries. The T-
> > > 105s and T-125s seem to be much better than the L -16s. The 10
> year rated
> > > L -16s, in my experience seldom last longer than 5 years, while many
> of the
> > > 5 year rated T - 105s and 125s go close to 10 years.
> > >
> > > I don't recommend L - 16s to customers any more. I've gone to the
> Surrette
> > > line.
> > >
> > > -Drake
> >
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