Right on Steve, but I suggest running them down more to increase range without increasing weight. If you only go to 50%, then half that lead is just ballast. Even if they only last 5 years, that's about $200 per year at today's prices. I'm sure most power boaters spend more than that on maintenance.
It would be interesting to compare cost per pound per cycled watt-hour or some such bench-mark for various usage patterns. I know there are a couple spreadsheet gurus on this site...
Cheers,
Jim McMillan
--- In electricboats@yahoogroups.com, Steve Spence <steve@...> wrote:
>
> If you limit the discharge to 50%, you can get 10+ years on those t-105's.
>
> Steve Spence
> Renewable energy and self sufficiency
> http://www.green-trust.org
> http://arduinotronics.blogspot.com/
>
>
>
> On 09/14/2010 03:09 PM, luv2bsailin wrote:
> >
> >
> > Hi Owen,
> > You may want to consider plain old wet-cell lead-acid batteries. A set
> > of good golf car batteries (T105 or similar), if discharged to say 75%
> > or 80% DOD every weekend, kept charged between use, and watered once or
> > twice a year will last at least that long. You may notice some gradual
> > reduction in range after 5 years or so, but they tend to fade slowly so
> > you should have plenty of time to plan for replacement.
> > Jim McMillan
> >
> > --- In electricboats@yahoogroups.com
> > <mailto:electricboats%40yahoogroups.com>, "otyers" <otyers@> wrote:
> >
> >>
> >> For those of us that are lucky if we get out on the water 30-50 days in
> >> a year (a range of 150 - 350 discharge cycles over a 5-7 year period),
> >> what battery type would make the most sense? Also, any tips on where
> >> to source these batteries inexpensively?
> >>
> >> Thanks for any advice.
> >>
> >> Regards,
> >>
> >> Owen
> >>
> >
> >
>
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