--- In electricboats@
>
> Mastervolt makes the SilentProp 10 a 10 Kw continuos AC motor, Selling points for this drive for me is that it is AC (no permeant magnets or brushes to fail), totally sealed, 48volts So still qualifies as low voltage from an insurance perspective. And has a company backing it that will most likely still be here in ten years. Whether they will still support this product is another mater. ;-)
>
> http://www.bellmann
>
>
> For batteries if range is your number one concern get LiFePo4 cells 15 3.3 cells make 48 volts. Buy the biggest you can:
> http://www.evcompon
>
> Or if money is the number one concern get the best LEAD AGM you can afford.
>
> Ta Ta.
>
> On Jan 2, 2010, at 9:34 PM, barnabyrands wrote:
>
> > Hello all, lots of fascinating information on this group site!
> >
> > I have a 7.6 metre timber launch that I've just finished restoring, and I have put a 26Kw diesel in it, which pushes the boat past hull speed comfortably. Unfortunately, its extremely noisy, and after spending three months redesigning and building a new engine enclosure, its still far too noisy.
> >
> > So, I'm seriously considering selling the diesel and converting to an inboard electric system.
> >
> > I have lots and lots of questions, and thought it might be useful to ask to be pointed in the direction of some posts / case studies of people with similar projects. Any suggestions and considerations would also be very welcome.
> >
> > The details of the boat are:
> > 7.6m LOA, approx 7m LWL
> > Max WL beam = 2m
> > Displacement = approx 3000kg
> > I estimate that 10 kilowatts is what the hull form needs to be driven to hull speed (hence a 26Kw engine running at 60% capacity at present)
> >
> > The boat is currently sitting above its lines, so weight for batteries is not a concern - especially after the diesel is removed.
> >
> > Very interested in any suggestions people may have for me.
> >
> > Barney
> >
> >
>
Barney,
I agree that Mastervolt (Bellman) may be a good bet but they will be more expensive than "Electric Yacht" DIY kits out there. You might also check out OZ Marine and/or Asmo Marine. Also, if you aren't interested in an electric boat conversion kit and you want to build your own system get a good BLDC motor and you will have the low maintenance of no brushes and the benefit of high torque at 0-2,000 RPMs and the installation will be less expensive than an AC system. Put your money in good battery packs, brushless motor and controller. I use HiPower LifePO4 bateries and love them.
ebdrives
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