AGM batteries are ideal for marine use, as they are sealed, and mixing
with acid and salt water are not an issue. Even if they get broken, they
do not leak. They will also work inverted, in case the unthinkable happens.
Steve Spence
Renewable energy and self sufficiency
http://www.green-trust.org
http://arduinotronics.blogspot.com/
On 08/31/2010 02:18 AM, Daniel Michaels wrote:
>
>
> Well the battery bank is supposed to be in an approved enclosed
> container with a vent. Mine has a vent on the transom 1/2" line more
> than likely something for the engine. So I have an enclosed box with a
> vent above the water line. Salt water and batteries do not mix. I used
> to mix chloride and acid to make Chlorine dioxide for cleaning wells. I
> found out it works rather well to kill gophers also. As far as a
> generator on deck I am not sure why you would have one on deck if you
> have such big waves (Why aren't you sailing at this point). On calm days
> when you have to motor... The same thing can happen to a gas or diesel
> engine so I still do not see the point. Splash just a little water on a
> gas engine and I do not think it will run. My car quits every time I
> wash it. I guess a water tight bulkhead would come to mind for
> electrical or gas engines.
>
> Dan
>
> --- On *Tue, 8/31/10, Rob Johnson /<dopeydriver@yahoo.com.au>/* wrote:
>
>
> From: Rob Johnson <dopeydriver@yahoo.com.au>
> Subject: Re: [Electric Boats] Re: Retrofiting a classic
> To: electricboats@yahoogroups.com
> Date: Tuesday, August 31, 2010, 12:40 AM
>
>
>
> Dan , my question was what do people do to protect their battery
> bank , or on deck generator from being swamped .
> All of the boat owners we have to assist would have done things
> differently , in hindsight , I'm looking to other peoples foresight .
> Regards Rob J.
>
> ----------------------------------------------------------
> *From:* Daniel Michaels <nov32394@yahoo.com>
> *To:* electricboats@yahoogroups.com
> *Sent:* Tue, 31 August, 2010 2:04:58 PM
> *Subject:* Re: [Electric Boats] Re: Retrofiting a classic
>
>
>
> If you have to safe guard against everything to the point that if
> you leave the house there has to be 100% chance you are going to
> return you would never be able to leave the house. Further more how
> safe are you in the house to begin with.
>
> If the boat got swamped by a wave why was the hatch open? Owners fault.
> Boats have been sailing for decades without an electrical bilge
> pump. Why did they not have a manual bilge pump? Owners fault.
> No backup battery for the radio or even a handheld. Owners fault.
>
> Pilots hit mountains all the time in airplanes, it is rarely if ever
> the planes fault or anything to do with the plane. It is almost
> always pilot error. Same holds true for a ship at sea.
>
> Dan
>
>
> --- On *Mon, 8/30/10, Rob Johnson /<dopeydriver@yahoo.com.au>/* wrote:
>
>
> From: Rob Johnson <dopeydriver@yahoo.com.au>
> Subject: Re: [Electric Boats] Re: Retrofiting a classic
> To: electricboats@yahoogroups.com
> Date: Monday, August 30, 2010, 10:01 PM
>
>
>
> I'd really like to have a hybrid marine diesel setup , with some
> solar panels also.
> It would mean , like I have done over the last few weeks , when
> the arthritis is playing up too much to get the mainsail up , I
> can motor .
> Over 2 hours of motoring , I probably wouldn't use 3 litres of
> diesel , so its no big deal.
> But when I get out to the fishing grounds it would be nice to
> then switch to electric , and just troll around like I do now .
> Trolling in engine mode , well its not as much fun as under sail
> , but over this winter , I'd only put the main up 1/2 the times
> I've gone out , and I go out at least once a week , over winter
> , every second day , or more , in the warmer months.
> I won't have petrol or gas on the boat , and all electrical work
> is done by a very experienced marine electrician.
> I work also in the radio room of the volunteer Coastguard , and
> all of our callouts have been involving petrol engines , fires
> and explosions , and electrical.
> None with diesel engines failing.
> Its pretty chilling , to get a "mayday" from a boat way out to
> sea , after a petrol fumes explosion and fire.
> I'd love to have the best of both worlds , diesel , and electric.
> My concern though , is we read of these big banks of batteries ,
> and petrol generators , I presume on deck , what happens if they
> get swamped ?.
> One of our last responses was to an epirb , set off by a boat
> owner after his boat was hit by a rogue wave , and was in real
> danger of sinking.
> No electrics , no way of starting the outboard , no radio , no
> electric bilge pump.
> Could someone please tell us how they have safeguarded against
> this occurrence ?.
> Regards Rob J.
>
> ----------------------------------------------------------
> *From:* sirdarnell <sirdarnell@yahoo.com>
> *To:* electricboats@yahoogroups.com
> *Sent:* Tue, 31 August, 2010 11:59:43 AM
> *Subject:* [Electric Boats] Re: Retrofiting a classic
>
> No one has developed the controller for this in smaller sizes.
> Also, I think in small systems the fuel savings don't make up
> for the costs of the electric drive system.
>
> The trick is to use any excess energy in a useful and needed
> fashion while keeping the diesel generator running in it's ideal
> power band, usually 65-85% of full speed (rpms.) However, a
> possibility would be a smart battery controller with remote
> generator start up (you can find these on some websites selling
> to the off-grid market.) Assuming you have a good sized house
> battery so you can sit in a nice anchorage and enjoy nature
> without a generator constantly running... Use the house (not
> starting) battery drive your motor, but have the charge
> controller automatically turn on the generator when the
> batteries hit some level, say 50% dept of discharge. Now if
> you've an efficient, preferably DC generator, that can provide
> full power to the charger and the motor, we're set. When you
> hear the generator start or see the indicator light come on, if
> possible, adjust boat speed until the generator is running at
> 65-80% of maximum rpms.
>
> BTW hybrids are not diesel-electrics or gas-electrics, unless
> they are what one company calls an extended range electric car.
> Since in a diesel-electric system the diesel doesn't attached to
> the drive train, not even in trains. (Except one Canadian brand
> that has diesel/electric hybrid train engine.)
>
> --- In electricboats@yahoogroups.com, "Eric" <ewdysar@...> wrote:
> >
> > Sid,
> >
> > You're absolutely correct. Diesel-electric has been used for
> many decades and has proven to be more efficient than diesel
> alone. But there appears to be a problem of scale. Do you know
> of any specific examples of successful diesel-electric vehicles
> or vessels that weigh less than 100 tons?
> >
> > Fair winds,
> > Eric
> > Marina del Rey, CA
> >
> > --- In electricboats@yahoogroups.com, "sirdarnell"
> <sirdarnell@> wrote:
> > >
> > > I keep seeing this. The military has been using diesel
> generators with electric engines since the 1930s (maybe earlier)
> to get more range. So it must be work. Not to mention trains,
> cruise ships, Ice breakers, freighters, etc.
> > >
> > > --- In electricboats@yahoogroups.com, Daniel Michaels
> <nov32394@> wrote:
> > > >
> > > > Unless you are going to supplement the generator with
> solar and wind or shore power I think you will get less range
> than by just using a diesel engine.
> > > >
> > > > Dan
> > >
> >
>
>
>
>
> ------------------------------------
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