Lifeline has 255 ah 12v AGM batteries. I use them in off grid
applications.
http://www.lifelinebatteries.com/marinedeepcycle.phpSteve Spence
Renewable energy and self sufficiency
http://www.green-trust.orghttp://arduinotronics.blogspot.com/On 10/17/2010 07:20 PM, Kirk Mason wrote:
>
>
> Jim,
>
> Thanks! Can you recommend a similarly-sized battery I can use in a set
> of four that will have a lot more available amps?
>
> Kirk
>
> --- On *Sun, 10/17/10, luv2bsailin /<
luv2bsailin@yahoo.com>/* wrote:
>
>
> From: luv2bsailin <
luv2bsailin@yahoo.com>
> Subject: Re: [Electric Boats] Which Amperage?
> To:
electricboats@yahoogroups.com> Date: Sunday, October 17, 2010, 7:47 AM
>
> Kirk,
> It depends on how long you want to run at 200A. You might get 10 or
> 15 minutes out of one (or any number in series) of those 65AH
> batteries running at that level.
> I believe you said you already have an E-tek motor and four 65 AH
> Optimas, right? Those batteries will be your limiting factor, not
> the motor, so that 200A number doesn't mean much.
> My "eyeball estimation" is that those batteries will give you about
> an hour's duration at 2 horsepower (30A at 48V), with the occasional
> shot of 3 or 4 HP for maneuvering included. The motor will be
> comfortably loafing along at those power settings. If you run harder
> or longer than that you'll eat up those batteries pretty fast.
> Jim
>
>
>
>
>
> >
> >
> > On 10/16/2010 07:20 PM, Kirk Mason wrote:
> > >
> > >
> > > So, when a motor manufacturer says his 48 volt motor is capable of
> > > handling up to 200 amps, to provide that kind of amperage from
> the kind
> > > of batteries described here, one would need 16 of them?
> > >
> > > --- On *Sat, 10/16/10, Dave /<dasilvor@...>/* wrote:
> > >
> > >
> > > From: Dave <dasilvor@...>
> > > Subject: Re: [Electric Boats] Which Amperage?
> > > To:
electricboats@yahoogroups.com> <
http://us.mc1130.mail.yahoo.com/mc/compose?to=electricboats@yahoogroups.com>
> > > Date: Saturday, October 16, 2010, 1:35 PM
> > >
> > > Well spotted Carel, I didn't see the other half of the
> question. :-)
> > >
> > > The use of the higher voltage set up reduces the size of the
> wiring
> > > required. If you are going to draw 260amps your wiring will
> have to be
> > > much heavier than if you are drawing 65. I would think
> though that
> > > Carels final option would be the most useful. 16 batteries,
> in a 4 by 4
> > > block.
> > >
> > > Cheers
> > > Dave
> > >
> > >
> > >
> > > On 16/10/2010 13:47, Carel Ruysink wrote:
> > > > Dave is correct.
> > > >
> > > > For the second part of your question;
> > > > If you have 4 batteries 12V/65Ah in series you get a
> battery of
> > > 48V/65Ah.
> > > > If you have 4 batteries 12V/65Ah parallel you get a battery of
> > > 12V/260Ah.
> > > > If you want 48V/260Ah you need 16 batteries, ie. 4 rows of 4
> > > batteries.
> > > >
> > > > If you discharge at a higher rate than C10 (or C20 as some
> > > manufacturers use) than are the usefull amps less or
> discharging at
> > > a lower rate it will be more (peukert effect).
> > > > Do not use more than 50% of the rated Ah or you will ruin your
> > > batteries in no time.
> > > >
> > > > Carel.
> > > >
> > > > ----- Original Message -----
> > > > From: Dave
> > > > To:
electricboats@yahoogroups.com> <
http://us.mc1130.mail.yahoo.com/mc/compose?to=electricboats@yahoogroups.com>
> > >
> <
http://us.mc545.mail.yahoo.com/mc/compose?to=electricboats@yahoogroups.com>
> > > > Sent: Saturday, October 16, 2010 2:27 PM
> > > > Subject: Re: [Electric Boats] Which Amperage?
> > > >
> > > >
> > > >
> > > > What the figures mean is that the maximum amps you can
> safely
> > > drag out
> > > > of the battery for cranking an engine over (etc) is
> 950amps.
> > > Below a
> > > > certain temperature (no idea what that will be, but the
> > > manufacturer
> > > > will provide that info) that figure drops to 750amps.
> The final
> > > figures
> > > > is how long you can draw a certain number of amps
> before the
> > > battery is
> > > > flat. This last figure is usually calculated at a ten
> hour rate
> > > (C10),
> > > > so theoretically you can draw six and a half amps for
> ten hours
> > > on a
> > > > fully charged battery. As soon as you increase the
> discharge
> > > rate, you
> > > > lose capacity. So if drawing thirteen amps, it will
> probably
> > > only last
> > > > four hours instead of the expected five.
> > > >
> > > > I hope this helps.
> > > >
> > > > Cheers
> > > > Dave
> > > >
> > > > PS.. I've been lurking for a while so thought I ought
> to start
> > > > chipping in. I used to race electric model boats, so am
> > > facinated by the
> > > > idea of having a boat with electric propulsion. My long
> term
> > > goal it to
> > > > have a narrowboat on the UK canals using an electric drive
> > > perhaps in
> > > > the same configuration as a diesel electric train to
> improve fuel
> > > > consumption.
> > > >
> > > > On 16/10/2010 13:12, Kirk Mason wrote:
> > > > > My 12-volt Optima AGM batteries have three Amp
> ratings: 950
> > > cranking amps; 750 cold cranking amps; and 65 amp hours.
> > > > >
> > > > > When it comes to relating that to motor specs, to
> which do I
> > > refer?
> > > > >
> > > > > Say I have four of them wired in series for 48
> volts. Does
> > > that mean my battery pack has 260 amp hours?
> > > > >
> > > > > Is that what manufacturers mean when they say their
> motor is
> > > rated for 48 volts and 200 amps?
> > > > >
> > > > > Thanks,
> > > > >
> > > > > Kirk
> > > > >
> > > > >
> > > > >
> > > >
> > > >
> > > >
> > >
> > >
> > > ------------------------------------
> > >
> > > Yahoo! Groups Links
> > >
> > >
> > >
> > >
electricboats-fullfeatured@yahoogroups.com> <
http://us.mc1130.mail.yahoo.com/mc/compose?to=electricboats-fullfeatured@yahoogroups.com>
> > >
> <
http://us.mc545.mail.yahoo.com/mc/compose?to=electricboats-fullfeatured@yahoogroups.com>
> > >
> > >
> > >
> > >
> >
>
>
>
>
> ------------------------------------
>
> Yahoo! Groups Links
>
>
>
>
electricboats-fullfeatured@yahoogroups.com> <
http://us.mc1130.mail.yahoo.com/mc/compose?to=electricboats-fullfeatured@yahoogroups.com>
>
>
>
>
------------------------------------
Yahoo! Groups Links
<*> To visit your group on the web, go to:
http://groups.yahoo.com/group/electricboats/<*> Your email settings:
Individual Email | Traditional
<*> To change settings online go to:
http://groups.yahoo.com/group/electricboats/join (Yahoo! ID required)
<*> To change settings via email:
electricboats-digest@yahoogroups.com electricboats-fullfeatured@yahoogroups.com<*> To unsubscribe from this group, send an email to:
electricboats-unsubscribe@yahoogroups.com<*> Your use of Yahoo! Groups is subject to:
http://docs.yahoo.com/info/terms/
No comments:
Post a Comment