T-Pain Is On A Boat: Re: [Electric Boats] battery source

Sunday, November 21, 2010

Re: [Electric Boats] battery source

Dear SBW,

Thanks allot for your clarification.

Cheers Stuart

----- Original Message -----

From: Steamboat Willie

To: electricboats@yahoogroups.com

Sent: Sunday, November 21, 2010 1:16 PM

Subject: Re: [Electric Boats] battery source

I guess you'd call them golf buggies. Folks use them to ride around golf courses, retirement communities and other places as well. Here we call them golf carts or golf cars. I have no idea what a golf trolley is.

There are of course other battery manufacturers besides Trojan. Do your homework re battery amp hours as they vary anywhere from about 180ah to 250 or so. You get what you pay for; if you can't find the capacity stamped on the battery or online somewhere, avoid it. DON'T rely on the salesman's bull.

Batteries are HEAVY and shipping will kill you. Find a local supplier who buys them in bulk, which the golf car folks do.

Willie

--- On Sun, 11/21/10, Stuart <stuartkeane@talktalk.net> wrote:

From: Stuart <stuartkeane@talktalk.net>
Subject: Re: [Electric Boats] battery source
To: electricboats@yahoogroups.com
Date: Sunday, November 21, 2010, 6:01 AM

Hi SBW,

Do you mean Golf Buggies or Golf Trolley Batteries?

Cheers Stuart

----- Original Message -----

From: Steamboat Willie

To: electricboats@yahoogroups.com

Sent: Sunday, November 21, 2010 10:26 AM

Subject: Re: [Electric Boats] battery source

Being they are GOLF cart batteries, they are plentiful and easy to come by, call around to the golf cart shops in your area. They buy batteries by the pallet, and should give you a good price especially when you buy 6 or more. For a small fee they'll usually deliver them too.

Willie

--- On Sat, 11/20/10, tartan27hull157 <tartan27hull157@yahoo.com> wrote:

From: tartan27hull157 <tartan27hull157@yahoo.com>
Subject: [Electric Boats] battery source
To: electricboats@yahoogroups.com
Date: Saturday, November 20, 2010, 11:19 PM

Hi guys,

Sorry, I know this must come up a lot, but what is a good source for T-105s delivered at this price?

Of course, other battery supplier recommendations also welcome.

Thanks, Paul

--- In electricboats@yahoogroups.com, "Eric" <ewdysar@...> wrote:
>
> John,
>
> Let's do that. We'll even double the number of T-105s to get the weight closer to the 200Ah 12V NiFe array.
>
> 2400Wh NiFe = 13.2" x 32" x 13.6" = $1760 FOB
> 5745 cu. inches, 280 pounds, 1920Wh usable @ 80% DoD
> 5400Wh T-105 = 10.4" x 28.6" x 10.7" = $600 delivered
> 3182 cu. inches, 248 pounds, 2700Wh usable @ 50% DoD
>
> The four T-105s have 40% more usable capacity, are 44% smaller, are 11% lighter and and are 1/3 the cost of the 200Ah 12V NiFe bank. Even running the NiFe batteies to 100% DoD gives less capacity than the T-105s at 50% DoD. Using a 50% DoD on the FLA batteries also gives you a bigger reserve in case of an emergency.
>
> But as I've said before, everyone needs to figure out what is most important for themselves, every choice comes with tradeoffs. The cool part is that we each get to build our boats any way we like. I'm looking forward to hearing how the first NiFe boat in this group turns out.
>
> Fair winds,
> Eric
> Marina del Rey, CA
>
> --- In electricboats@yahoogroups.com, john briese <goodguyforsure@> wrote:
> >
> > All this "Math" forgets using 50% of charge on T105s and using 80 to 100% on Nife.
> >
> > Lets complete the math.
> >
> > To: electricboats@yahoogroups.com
> > From: ewdysar@
> > Date: Tue, 16 Nov 2010 08:47:47 +0000
> > Subject: Re: [Electric Boats] Picking batteries - NiFe
> >
> > Kevin,
> >
> > I did the math with the data on the link that you provided.... Looking at the 200Ah cells, they are 26.4 pounds dry or 264 pounds for a dry 200Ah 12V (2400kWh) battery. Add water and you're probably past 280 pounds or 8.5Wh/lb.
> >
> > Alternatively, a T-105 weighs 62 pounds (according to Trojan) and is rated for 225Ah @ 6V or 1350Wh. That works out to 21.8 Wh/lb. Take two in series and you've got a 225Ah 12V battery that weighs 124 pounds.
> >
> > Are you really sure that size doesn't matter? Lets compare the 200Ah 12V NiFe to the 225Ah 12V T-105s
> >
> > 2400Wh NiFe = 13.2" x 32" x 13.6" = 5745 cu. inches, 280 pounds
> > 2700Wh T-105 = 10.4" x 14.3" x 10.7" = 1591 cu. inches, 124 pounds
> >
> > The NiFe battery is more than 3 times the volume of the two T-105s for 10% less rated capacity.
> >
> > I'm not passing any judgement, just doing the math so that people can decide for themselves.
> >
> > Fair winds,
> > Eric
> > Marina del Rey, CA
> >
> > --- In electricboats@yahoogroups.com, Kevin Pemberton <pembertonkevin@> wrote:
> > >
> > > Eric,
> > >
> > > According to this page batteries supplied by Ironcorebatteries
> > > http://www.ironcorebatteries.com.au/page8.php 100Ah weigh almost 100lbs
> > > for 12v pack...
> > >
> > > Kevin Pemberton
> > >
> >
>