battery cycle life [RE-wrenches]

[Ray Walters]

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Hi Todd;

I was referring to the Trojan T105.  I don't go over 16 batteries, and try 
no to go over 8 batteries at 12 v. I go straight up to the big stuff .  I'm 
trying the Rolls 5000 currently because of its advertised 2000 cycles at 
80%DOD. Nobody ever confirmed that BTW, but no one on the list disputed it 
either. I used Exide, Bulldogs, etc., but for handling purposes I like 
smaller packages. The Rolls I last used were 250 lb per 4 v battery- just 
dooable for 2 guys. I like that they have handles, but I wish they were not 
on the side. The side handles take way too much valuable space in the 
battery box. If they last as long and really have the AH claimed at the 100 
hr rate, they should be great.
I offer fairly sizable discounts to make skipping past the bogus L16 s 
easier for the customer.
The more premature failure L16s I move to the recyclers the more I hate 
them. My original home system used those, and it almost broke up my 
relationship. They never had half the real world amp hours they claimed. 
And moving old ones without any carrying handles or mounts...

Ray


>Ray,
>
>What are your referring to when you say "golf cart batteries"? Since they are
>low a/h what do you do on your jobs that need higher capacity? I understand
>multiple parallel strings also creates problems.
>
>Todd
>
>
>Ray Walters wrote:
>
> > >Hi;
> >
> > Did you take into account the variation of AH capacity relative to
> > discharge rate (Puekert's Exponent?) That changes the calculations too. I
> > did a spread sheet for a customer to compare different battery types for
> > total cost per KWH over their lifespan. I included  maintenance &
> > replacement costs. The L16s were the worst. The golf cart batteries were
> > the best deal not considering maintenance, and the big cells (Rolls series
> > 5000) were the best deal in the long run including maintenance costs, but
> > that was with a healthy discount . At retail prices, the golf cart
> > batteries are the best (If the customer maintains them)
> >  From the chart below, The L16 has 600 cycles at 100% DOD, the T105 has 750
> > cycles at 100%DOD. I quit selling L16s all together about a year ago.
> >
> > Cheers to a better New Year,
> >
> > Ray

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