Nordic Tugboats has had a hybrid offering for several years. You might look into how they manage their systems.
Arby Bernt
Advanced Marine Electric Propulsion
From: Mike Gunning <mike@electricyachtssocal.com>
To: electricboats@yahoogroups.com
Sent: Monday, March 5, 2012 6:28 AM
Subject: Re: [Electric Boats] Why no high voltage?
It would be helpful to share the information on the boat when asking the question. You are breaking new ground with your large displacement boat and most of us on the forum do not think in your systems of your size.
The 48v system is appropriate for the smaller displacement boats when the power necessary is such that the "low voltage" as defined by the USCG and ABYC allows the use of safe and less expensive systems. For a large displacement boat as yours, you will need a high voltage system. Please contact Jack McCoy at jmccoy@energytechmarine.com or phone 619 379 0060.
When I last spoke with Jack they were installing power systems 40 to 250 HP systems in boats along with power management systems.
Mike - Electric Yacht of Southern California
--- In electricboats@yahoogroups.com, brucekroll@... wrote:
>
> Well, that answer made sense to me. We are looking at converting a 50' Hatteras to electric power and will need a pair of 50hp electric motors. The boat is currently powered with a pair of 8V71N Detroit diesels that drink 5 gal/hour each...at idle! Lol We travel at displacement speed or fractions thereof so much less actual power is needed.
>
> On Mar 4, 2012, at 11:47 AM, "Myles Twete" <matwete@...> wrote:
>
> > Some folks are using HV systems.
> >
> > Notwithstanding that, the driving reason why most use low voltage setups is:
> >
> > · Availability of reasonably low cost 6-8kw, 48v or less parts thanks to the golf cart industry
> >
> > · The fact that for many of us, 8kw of power is plenty
> >
> > · That weight in cabling and power lost and cost in cabling is not an issue
> >
> >
> >
> > -Myles Twete
> >
> > www.evalbum.com/492
> >
> >
> >
> > From: electricboats@yahoogroups.com [mailto:electricboats@yahoogroups.com] On Behalf Of Kirk McLoren
> > Sent: Sunday, March 04, 2012 11:32 AM
> > To: electricboats@yahoogroups.com
> > Subject: Re: [Electric Boats] Why no high voltage?
> >
> >
> >
> >
> >
> > probably law or insurance
> >
> >
> >
> >
> > Nemo dat quod non habet
> >
> >
> >
> > From: marcdrachten <mevanderkuur@...>
> > To: electricboats@yahoogroups.com
> > Sent: Sunday, March 4, 2012 10:56 AM
> > Subject: [Electric Boats] Why no high voltage?
> >
> >
> >
> >
> >
> > All current electric drive systems are based on low DC voltage systems. Why no high voltage systems, 110 or 220 volts? Currents can be much lower resulting in smaller wiring. Any ideas on this?
> >
> >
> >
> >
> >
>
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