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Old 12-09-2013, 12:07   #16
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Re: best battery?

Quote:
Originally Posted by Stu Jackson View Post
You also should inspect your entire electrical SYSTEM.

Does your alternator output go through the C post of the 1-2-B switch? Do you have a wiring diagram of your boat's electrical system?


PS - 4D and 8D batteries are a disaster, for your boat and for your back. Maine Sail has mentioned many times that 4D and 8D batteries are not truly deep cycle, they are dual purpose, essentially good for nothing except breaking your back.
i have been attacking my electrical system in parts.

so far i have determined the 120volt wire is all proper tinned marine wire and in good shape.

the 12 volt is not so hot.
been replacing as i see it.
and no, lol no diagram. the old owner saw fit not to keep one up.

and yes, i understand they are not true deep cycle, but the last ones lasted 8 years.
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Old 12-09-2013, 12:21   #17
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Re: best battery?

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Originally Posted by Efraim View Post
4D batteries are about 120lbs. Think of how fun you going to have moving those around.
concrete is 80# i throw them like they are pillows.
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Old 12-09-2013, 12:39   #18
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Re: best battery?

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concrete is 80# i throw them like they are pillows.
Remind me not to pick a pillow fight with you!!!

I'm surprised no one has mentioned Trojan T-105's........too pricey?
I have 4, 6V Werker golf cart batteries from Batteries Plus that are now 5 years old and still going, but seem to deplete just a bit quicker now than when they were new. I have 270 watts of solar and a wind genny both on independent controllers. I top off the water about every month or two when they need it.
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Old 12-09-2013, 12:53   #19
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Re: best battery?

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Remind me not to pick a pillow fight with you!!!
LOL!!!
i am a lorry driver, i do all kinds of crazy load lifting.
i will pay for it in 20 years but for now, meh,.
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Old 12-09-2013, 13:03   #20
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Re: best battery?

I know nothing about batteries except that on my last boat, I had what are called golfcart batteries as house and they kept everything running for at least 3 days. The fridge, lights and water pumps were still as strong as they were before we'd drop anchor.

My problem is, I have no idea what they were or how they were wired.....parallel or sequence??

I just know they worked.
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Old 12-09-2013, 19:42   #21
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Re: best battery?

my costco are the equivalent of trojan t 105s i just didnt have the dough for the real thing..... the ones i have are half price of trojans.
i like the trojan batteries as i have had those last me over 7 years.
with costco batteries---my first set had screw caps and lost water rapidly.
this set has a slidey cap thing that deals with all the fill sites a one movement, and fits tightly without leaking.. this system seems to allow water to remain inside batteries longer--i get about 3 months here but then it is tropical and stuff just doesnt evaporate fast in summer--the water didnt last a month in mazatlan before i had to add m0re, same in la cruz de huanacaxtle/banderas bay.
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Old 12-09-2013, 19:50   #22
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Re: best battery?

we dont have a costco here.
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Old 12-09-2013, 20:01   #23
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Re: best battery?

Best battery, hmmm, been asking myself that same thing. I need more ah, but can't/won't add more weight, so the best battery for me is lifepo4, at the moment. Ymmv
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Old 12-09-2013, 20:09   #24
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Re: best battery?

and what is the lipo4 cost per AH?
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Old 12-09-2013, 20:13   #25
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Re: best battery?

After a quick calculation, about $6\ ah to the door, installed. Pricey, but more ah and half the space and weight.

Also rated for 2000 cycles, so comparing to la, it's no comparison.
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Old 12-09-2013, 20:16   #26
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Re: best battery?

does that include the special controllers and chargers?
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Old 12-09-2013, 20:17   #27
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Re: best battery?

with a rough calculation, its $2 per AH for these.
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Old 12-09-2013, 20:20   #28
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Re: best battery?

I'm using the Midnite classic 150, but thats not calculated into the cost. Most charters can be made to charge Lithium ferrous with a custom program.
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Old 12-09-2013, 22:32   #29
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Re: best battery?

The 6 volt golf cart batteries can also be had at Sam's club for about $90(Texas). Been happily using them for years, they consistently seem to last about three years. They were $60 last time around. And at 66 lbs each are much easier to handle than the 165 lb 8D's
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Old 12-09-2013, 22:45   #30
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Re: best battery?

Is it safe to say that two of the 6v golf cart batts. will fit a compartment made for one 8D? What about height? I guess you're also looking at making up add'l cables.
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