The original request was for a houseboat to do the Great Loop, so California seems well off track.
Eric
--- In electricboats@yahoogroups.com, "aweekdaysailor" <aweekdaysailor@...> wrote:
>
> Is this houseboat in CA or some other solar-subsidy state? Can you hook up a grid-tie...long enough to fool an inspector?
>
> :)
>
> (The other gotcha with big high-wattage solar arrays...they are also high voltage - in some cases very high)
>
> -Keith
>
> --- In electricboats@yahoogroups.com, "Byron Evetts" <h2ologged@> wrote:
> >
> > Jim,
> >
> >
> >
> > Dying sailboats (cat or monohull) are a dime a dozen. See craigslist or your
> > local marina. The 10kW of PV panels is a pipe dream. I am doing a solar
> > project for the YMCA Indian Guide and it took months to get a single 180W PV
> > panel for the kids (Too big and the wrong voltage but still the best I could
> > scrounge). Write a check for about $30,000 and you'll have your 10kW. Oh,
> > and you need a butt load of batts or you're wasting a lot of generation and
> > only moving in the bright daylight. (and you need about 2000 sq ft of deck
> > space).
> >
> >
> >
> > All the utils, parks, etc run them til dead before they surplus them.
> >
> >
> >
> > QED: Boat=easy. PV panels=hard.
> >
> >
> >
> > Byron
> >
> >
> >
> > From: electricboats@yahoogroups.com [mailto:electricboats@yahoogroups.com]
> > On Behalf Of luv2bsailin
> > Sent: Monday, February 14, 2011 12:17 AM
> > To: electricboats@yahoogroups.com
> > Subject: [Electric Boats] Re: Setting expectations
> >
> >
> >
> >
> >
> > I know I tend to shoot from the hip and toss around ideas just to stimulate
> > discussion if nothing else. It's easy to forget that there are a lot of
> > folks reading these posts and that off the cuff brainstorming comments could
> > be taken any number of ways.
> > So... where can I find an old dis-masted sailing cat and about 10KW worth of
> > surplus solar panels...
> > Cheers,
> > Jim
> >
> > --- In electricboats@yahoogroups.com
> > <mailto:electricboats%40yahoogroups.com> , "Eric" <ewdysar@> wrote:
> > >
> > > Jim,
> > >
> > > I appreciate your information and your candor. This estimate looks better
> > to me if only because you qualified most of your relevant assumptions;
> > location, power requirements, system size, etc.
> > >
> > > Since Bill has stated in other posts that "slow speed (5 to 10mph) is ok"
> > with him, it shows that he has different expectations than most of the
> > members of this group. Almost everyone here considers 5kts as "speeding"
> > under electric power, at least for multihour cruising. He's also looking for
> > about 50 miles under power each day.
> > >
> > > So here's the question at hand: On a typical 40' x 14' houseboat, can the
> > boat be driven at speeds above 5kts for 50 miles a day on solar power alone?
> > From my calculations, even on a good day, no.
> > >
> > > Taking the question all the way back to Bill's first posts. Is a typical
> > 40' x 14' houseboat a good candidate to convert to electric power alone?
> > Considering that most houseboats that size are delivered with well over
> > 400hp installed, reducing onboard power to 20hp or less will probably make
> > the vessel a hazard to navigation in all but the calmest conditions. A mild
> > 10kt crosswind could make the boat unsteerable. So again, from my
> > calculations, even on a good day, no.
> > >
> > > I've had some people here say that I shouldn't discourage other people,
> > that I should let them "follow their dreams". But we're the one of the few
> > sources of information about electric boats that isn't trying to sell
> > something. There's not many other places to turn to for answers. I'll
> > heartily encourage people to push the envelope on what an electric boat can
> > do, but the current conversation isn't even close. I love to proven wrong,
> > and I'm always learning new things when research my answers to discussions
> > here. But in my opinion, given current technologies, Bill's concept as
> > originally stated is a non-starter.
> > >
> > > Fair winds,
> > > Eric
> > > Marina del Rey, CA
> > >
> > > --- In electricboats@yahoogroups.com
> > <mailto:electricboats%40yahoogroups.com> , "luv2bsailin" <luv2bsailin@>
> > wrote:
> > > >
> > > > I forgot to mention that I was using Los Angeles as the location for
> > that 5/2 hour summer/winter figure. Chicago is 4.38/1, Miami is 4.4/2.4.
> > Since NREL uses historical data the typical weather patterns are factored
> > in.
> > > > Anyhoo, let's say my hypothetical 26x8ft pontoon shantyboat does 5kt on
> > 5hp on a calm day. I've got 200 square feet of brand-new high efficiency
> > panels on the roof. Total peak rated output is 3600W. It's summertime in
> > Miami and I want to take a cruise up the ICW before hurricane season heats
> > up. 3600*4=14,000 is about how much energy I'll be able to get from my PV
> > panels on an "average" day. Let's say about half of that gets wasted between
> > charging batteries and then discharging them to run the motor. That leaves
> > me with 7200 Watt-Hours available for the motor. Converting to "HP-Hours"
> > you wind up with 5HP for a couple hours. So, not accounting for wind and
> > tides, I can cover ten miles a day on pure solar alone. Maybe more if my 50%
> > efficiency number is too pessimistic. It may be, since you'll be sending
> > some of the power directly to the motor during high sun. Hard to say if
> > 5HP-5KT is reasonable either but hey, it's my hypothetical boat so I get to
> > pick the hypothetical numbers.
> > > > I don't know how this all relates to the hypothetical 40Ft houseboat,
> > being discussed. I suppose it really doesn't much.
> > > > Cheers,
> > > > Jim
> > > >
> > >
> >
>
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