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Unread 02-04-2010, 10:06 AM   #1
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Default Batteries 6-8v or 8-6v

I have been reading the forum for a couple weeks and have found tons of great info, so I had to join. I have a 99 48v Club Car, currently have 8 6v batteries that I got from (I know ) Sams club in 2006. They are shot now, partly due to quality and mostly from me not taking care of them properly. I let them run dry once and it's been downhill ever since. So here are my questions;

I read that more lead = more range, so is 8-6v better than 6-8v?
I'm looking at US batt, Trojan, and Crown. I know the T-105 is the "standard" for good GC batts. I have been on the US Batt site and see a few different GC batts, which model do you guys like.
Does anyone have a good battery supplier in the Atlanta area? I'm just trying to save myself hours of calling around looking. I understand that if the Admin doesn't want that info posted, maybe someone could PM me with a contact.

TIA
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Unread 02-04-2010, 10:10 AM   #2
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Default Re: Batteries 6-8v or 8-6v

You read correctly......I read that more lead = more range, so is 8-6v better than 6-8v? The answer is yes
Trojan T105 is their smallest 200 amp hour unit. Crown makes a better 225 AH battery. Shop by weight not name because as you know 'the more lead the better'.
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Unread 02-04-2010, 10:26 AM   #3
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Default Re: Batteries 6-8v or 8-6v

Quote:
Originally Posted by scottyb View Post
You read correctly......I read that more lead = more range, so is 8-6v better than 6-8v? The answer is yes
Trojan T105 is their smallest 200 amp hour unit. Crown makes a better 225 AH battery. Shop by weight not name because as you know 'the more lead the better'.
Thanks for the reply, I was leaning towards sticking with the 8-6v's. I have also installed the Paktrakr in my cart, it was useful in seeing what was going on with my pack. I have one batt that is completly toast, I was thinking of adding new batts as they fail. But, I see that is bad idea from reading here. So I'm going to bite the bullet and replace the whole set and be really anal on the maintenace of them this time.
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Unread 02-04-2010, 11:07 AM   #4
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Default Re: Batteries 6-8v or 8-6v

Tell us about the paktrakr (?)
what is it & what does it do?
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Unread 02-04-2010, 11:23 AM   #5
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Default Re: Batteries 6-8v or 8-6v

The paktrkr is pretty cool, it monitors each battery and you can also monitor the pack current, temp, and download info to a computer. Here is a link to it;

http://www.paktrakr.com/
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Unread 02-04-2010, 11:45 AM   #6
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Default Re: Batteries 6-8v or 8-6v

I sent them a request for info
What did you pay for that unit......
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Unread 02-04-2010, 12:12 PM   #7
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Default Re: Batteries 6-8v or 8-6v

Quote:
Originally Posted by scottyb View Post
I sent them a request for info
What did you pay for that unit......
I got mine from here, it's not cheap but if you want to know whats going on, I don't think you can beat it. Alot of the guys that conver cars to electric use it.

http://www.cloudelectric.com/SearchR...earch=paktrakr
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Unread 02-04-2010, 04:02 PM   #8
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Default Re: Batteries 6-8v or 8-6v

I suggest you quit putting so much priority on lead, it is important but not the main number to look at, at least in respect to range. The amount of lead gives you a clue about how long the battery will last, but nothing to do with range or run time. Run time or range is determined by Amp Hours or AH.

I will run one example for you using two batteries the Trojan T-105 a 6 volt 225 AH battery, and the Trojan T-875 a 170 AH battery

So you think lead or weight is the big deal huh? Wrong. The T-875 weighs in at 63 pounds and the T-105 at 62 pounds. So based on that you might conclude the 875 has the longer run time, but you are dead wrong.

Run Time or range is determined by the watt-hour capacity of a battery or battery bank. To find the watt-hourh multiply the voltage x Amp Hours. Now you will know.

So using T-105 the wh = 48 volts x 225 AH = 10,800 wh
Using the T-875 the wh = 48 volts x 170 AH = 8160 wh

A huge difference. Now with that said neither battery has their specified rating because they make those ratings at the 20 hour discharge rate. A cart uses a 3 hour discharge rate, so you have to derate by .37. That turns your T-105 into a 83 AH battery and a T-875 into a 63 AH battery. Why? Because Mr. Peukert says so.
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Unread 02-04-2010, 04:14 PM   #9
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Default Re: Batteries 6-8v or 8-6v

Quote:
Originally Posted by sunking View Post
I suggest you quit putting so much priority on lead, it is important but not the main number to look at, at least in respect to range. The amount of lead gives you a clue about how long the battery will last, but nothing to do with range or run time. Run time or range is determined by Amp Hours or AH.

I will run one example for you using two batteries the Trojan T-105 a 6 volt 225 AH battery, and the Trojan T-875 a 170 AH battery

So you think lead or weight is the big deal huh? Wrong. The T-875 weighs in at 63 pounds and the T-105 at 62 pounds. So based on that you might conclude the 875 has the longer run time, but you are dead wrong.

Run Time or range is determined by the watt-hour capacity of a battery or battery bank. To find the watt-hourh multiply the voltage x Amp Hours. Now you will know.

So using T-105 the wh = 48 volts x 225 AH = 10,800 wh
Using the T-875 the wh = 48 volts x 170 AH = 8160 wh

A huge difference. Now with that said neither battery has their specified rating because they make those ratings at the 20 hour discharge rate. A cart uses a 3 hour discharge rate, so you have to derate by .37. That turns your T-105 into a 83 AH battery and a T-875 into a 63 AH battery. Why? Because Mr. Peukert says so.
Thanks, great example. your example would show that 8-6v's is better than 6-8v's using the batteries you showed. How about the US Batt 145XC it has a 20hr rate of 251AH
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Unread 02-04-2010, 04:25 PM   #10
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Default Re: Batteries 6-8v or 8-6v

Quote:
Originally Posted by dplin2001 View Post
Thanks, great example. your example would show that 8-6v's is better than 6-8v's using the batteries you showed. How about the US Batt 145XC it has a 20hr rate of 251AH
You tell me, I showed you how.
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