T-Pain Is On A Boat: Re: [Electric Boats] Repowering 40' 1975 20,000 lb sailboat

Wednesday, September 30, 2009

Re: [Electric Boats] Repowering 40' 1975 20,000 lb sailboat

I would agree with much of what is said here, but we should mention
the location of cruising as an important factor. For example I believe
that in the Chesapeake, where currents are mild( generally under 1.5
kts), and distances short, an all electric system that gave you 20
miles of voyaging would work. I am in the process of refitting my
Moody 34 ( 34' 11200 lbs) with a 260i system from electric yacht.
Cruising in eastern CT/ Long Island Sound and out to Block Island the
distances are relatively short, but the currents are strong and need to be
part of any voyage calculations... I will report back on how
sucessful the system is in these conditions.

Skip

On Wed, Sep 30, 2009 at 8:42 AM, dennis wolfe <dwolfe@dropsheet.com> wrote:

>
>
> Joe,
>
> I'm curious about what percent of that 7,500 miles you were able to sail -
> I would guess not much sailing in the rivers & ICW.
>
> For electric you would need a budget of how much speed and time you need to
> run each day and use that (plus house loads) to size the battery bank.
> Ballpark - 1000 pounds of batteries would give you about 30 miles at 5 mph
> or 55 miles at 4 mph.
>
> Would you have access to shore power for recharging most nights? If not,
> that can be another deal breaker.
>
> A little gas generator (and a powerful battery charger) would be a comfort
> and a lot smoother and quieter than the ole' A4. The middle size Honda would
> probably get you 4 mph if you had a charger that could load it to 1.5 kw.
> I'd keep it on the swim platform.
>
> Still hard to beat AGM lead acid batteries for a sail boat - especially if
> you can remove some of the lead you already have in the basement. A lithium
> bank will increase initial cost 5x and its benefits of light weight and
> rapid charge -discharge tolerance are not that important in your
> application.
>
> Denny Wolfe
> www.wolfEboats.com
>
>
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>
>
>

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