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Electric EZGO Electric EZ GO Marathon, Medalist, TXT and RXV.



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Old 08-10-2012, 08:11 AM   #1
DraginRat
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Default using 12 volt batteries in EZ Go electric

I just purchased a 1977 EZ GO battery powered 3 wheeler (got it for $150.00). I intend to use this cart only at the track as a pit vehicle and occasional tow vehicle.

It appears that two of the batteries are shot, and the other 4 are marginal at best. Other than the batteries, the cart is in decent shape and should need nothing other than batteries.

I will have to replace the batteries of course, and was wondering if it made sense to use six 12 volt batteries. Hooking them up three in a series and connecting the two sets of three in parallel. I would still have 36 volts at the switch, but thinking a bit more power, but don't know if it would be too much power.

Thanks for any insight you may be able to offer

Ken Gasbarri
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Old 08-10-2012, 11:32 AM   #2
Bowslayer
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Default Re: using 12 volt batteries in EZ Go electric

Sounds like a lot of trouble and added expense for minimal gain if any. I've never done it or known anyone that's done it so maybe I'm wrong. If you do it post your results.
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Old 08-10-2012, 01:07 PM   #3
kab69440
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Default Re: using 12 volt batteries in EZ Go electric

If you want to tow with it, get the 6v. They will supply more amps than the 12v cells can dream about.
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Old 08-10-2012, 05:42 PM   #4
rwt101
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Default Re: using 12 volt batteries in EZ Go electric

Well I am doing just that. I bought a 97 txt and it had 3 brand new deep cycle batteries in it. I did not have 7-800 dollars to spend on batteries. So I bought 3 more 12v deep cycle batteries. I am putting 2 banks in series and then in parallel. So It only cost me about 250. I am not looking to tow or any long drives. So I hope it works out. I also had to make a new battery tray. The old one was rusted anyway.
Bob T
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Old 08-10-2012, 07:36 PM   #5
simple man
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Default Re: using 12 volt batteries in EZ Go electric

This is what I have in mine. These were from a yacht at the marina. The only problem you will encounter is shorter run time. These are heavy batteries! They weigh close to 100lbs! They are made by Deka. If you have any marinas near you, check with them. You may get a good deal on these types of batteries. Just make sure they are deep cycle batteries, not engine starting batteries.
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Old 08-10-2012, 07:51 PM   #6
rwt101
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Default Re: using 12 volt batteries in EZ Go electric

How much run time do you get out of them?
Bob T
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Old 08-11-2012, 08:30 AM   #7
JohnnieB
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Default Re: using 12 volt batteries in EZ Go electric

Gentlemen,

I took a look in the Trojan Product Specification Guide and discovered that you can get more AH with six 12V batteries connected in series-parallel than six 6V in series, but the 12V battery cases are 2.5" longer than the 6V cases.

If they will fit in the space available, six T-1275 batteries will produce a 300AH 36V pack while six T-145 will only give you a 260AH 36V pack.

I'm not sure how much more Run-Time the additional 40AHs will give your, or if it would be worth the expense and more complex wiring, but it looks like they can be had if you want or need them.

@ DraginRat:
You're going to have to upgrade your high current cables, F/R switch. solenoid and controller (if it has one) just to make full use of the Amp Hours available from a 6x6V pack.

Added:
Took a look at the respective run time ratings
T-145 = 145 Minutes @75A
T-1275 = 70 Minutes @ 75A, which would be doubled with two in parallel for 140 minutes @ 75A
However the current draw will be halved since they are in parallel, so the run-time @ 37.5A will probably be well over 200 Minutes.
(Peukert's Law raise it's head again )

Last edited by JohnnieB; 08-11-2012 at 08:52 AM.. Reason: added info
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Old 08-11-2012, 12:56 PM   #8
rwt101
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Default Re: using 12 volt batteries in EZ Go electric

Very iinteresting. I did have to make the tray larger and put one battery on the side tray.
Bob T
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