The ABYC has published Technical Information Report TE-30 which has recommendations for electrical propulsion systems ranging from 50VDC to less than 1000VDC, and 300VAC to less than 1000VAC.
I haven't seen any federal regulations regarding these systems in recreational craft yet. When it happens, you can bet that it will be based on TE-30.
-Tom
--- In electricboats@yahoogroups.com, GNHBus@... wrote:
>
> Well said Kevin, thanks
>
>
> In a message dated 1/18/2011 1:47:40 P.M. Eastern Standard Time,
> kevin@... writes:
>
>
>
>
> Hi all
> I have been reading for 5 years but seldem post. This site and some
> regulators seems to be stuck on 48v this voltage is ok for small boats, but we
> cannot advance without accepting the facts. I am an electricain and work
> daily with 120 v to 600 v and I make these systems safe for the public. I use
> breakers and mechicnal protection. This is not rocket science. The currents
> at low voltage are hard to manage, they create heat everywhere . the heat
> losses are to the square of the current.
> I read all the time of users having heat issues with controllers and
> building noisey and inefficent gear reductions. I have a soloman 4.5 kw with an
> off the shelf AMC controller ,cool, to the touch all day long even in
> summer. My sweet spot is 4 A (600W) at 3.5kts in chop. Direct drive means only 1
> moving part. low currents make for happy batteries. Green is full keel
> sloop at 5 ton.
> My regret is the propeller I was 16X7 27 hp diesel, I went to 16X16 3
> blade I wish for 4 blades or 16X20+ . The aggersive prop acts as a sea anchor
> so I spin at low speed (150W) while sailing ,like a dynamic neutral, and for
> a 100 watts more I can point a few degrees higher. I use a 3KW russco
> charger and Honda 2000i (1600w@ sea level,1400w up here on the lake) to reach
> amost hull speed, a 3000 would do it but they are too big.
> With recycled electric vechicles available in comming years we will go to
> 300 votls . Dont be afraid ,be safe..
>
> PS good luck to the Soloman team in Florida wish I was there.
>
> Kevin Shepherd
> E/SV Green
> B.C. Canada
>
> www.green-power.info
>
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