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Electric EZGO Electric EZ GO Marathon, Medalist, TXT and RXV. |
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04-02-2013, 11:55 PM | #1 |
Not Yet Wild
Join Date: Sep 2009
Posts: 6
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Six 12 volt Gel Cells in a 36v TXT
First off, thank you everyone participating in this forum, it's a killer reference place for new cart owners! I picked up a 2006 EZGO TXT series cart for cheap with no batteries. I got a deal on some 12v gel cell surplus batteries that were pulled from 2010 GEM smart cars. I took the batteries down to my local Bat. + store and Had them tested. Seven of these batteries that have tested out well and I figure they should work in the cart.
I'm going to run two battery "packs" which will consist of three batteries ran in series, the two packs being ran in parallel to the controller. Any ideas how this combo might be as far as performance/endurance is concerned vs six 6 volt lead acid? My dilemma is charging. I got a free 36 volt golf cart charger that looks brand new, but haven't tested it yet. I have read that gel cell batteries should be charged with a 3 or 4 stage charger that is specifically designed for gel cell batteries. I have found this one: , at $300 it's not cheap but it's cheaper than $620 for a new set of 6v batteries, and possible s charge(if my free one doesn't work) Anybody see why this wouldn't work or a better bang for my buck? I don't want to put a lot into this right now, but don't want to shoot myself in the foot either!! Thanks in advance for any advice or suggestions. |
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04-03-2013, 02:58 AM | #2 |
Gone Wild
Join Date: Dec 2006
Location: Halifax, Pa
Posts: 208
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Its been years since i had my electric cart but i do believe the more batteries the lobger your run time because of higher amperage. So in the running of 6 12v batteries properly wired should give you decent run time!
Never worked with that type of battery so i cant answer the charging questions Posted using Tapatalk |
04-03-2013, 03:59 AM | #3 |
Gone Wild
Join Date: Sep 2012
Location: Savannah, GA
Posts: 2,760
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Re: Six 12 volt Gel Cells in a 36v TXT
Assuming that your 12v batteries have a 100ah rating (I got that from a google search) you effectively have a 200ah 36v pack. You should get respectable performance and range with such a pack. Good find.
You're not wasting money on a GEL charger, most are capable of charging regular lead acid batteries too. If you get one of those it will still work when the GEL batteries fail and you go back to lead acid. |
04-03-2013, 05:01 AM | #4 |
Gone Wild
Join Date: Jan 2011
Location: Las Vegas, Nevada
Posts: 1,942
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Re: Six 12 volt Gel Cells in a 36v TXT
Get a gel charger and convert to 72 volt lol.
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04-03-2013, 07:08 AM | #5 | |
Techno-Nerd
Join Date: Jun 2011
Location: West Virginia
Posts: 19,654
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Re: Six 12 volt Gel Cells in a 36v TXT
Quote:
If it has a setting for AGM batteries, it might work. Their charge profile is similar to Gel-Cells. If it doesn't, the finish voltage will be too high and you will end up with bulging cases and leaking electrolyte. |
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04-03-2013, 11:28 AM | #6 |
Not Yet Wild
Join Date: Sep 2009
Posts: 6
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Re: Six 12 volt Gel Cells in a 36v TXT
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04-03-2013, 11:35 AM | #7 |
Not Yet Wild
Join Date: Sep 2009
Posts: 6
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Re: Six 12 volt Gel Cells in a 36v TXT
Looks like I forgot to link to the charger!!
http://www.chargingchargers.com/char...ll/i-3612.html This is the one I'm looking at... does anyone have any better options? Also..as far as converting to 72 Volts, I have ran that one through the idea bin as well. Im pretty sure i can get a hold of one of the 72v GEM chargers, then run all six batteries in series and I've got 72volts. I have read that I can use the stock EZGO 36v motor as it is rated past 8k RPMs....is this correct? and is there any decent controllers out there that can handle 72v without spending over $500? I know if I go this route I would probably need to change all of my cabling over to 2ga, besides that, will I have any problems? My options to get cart running: buy six 6 volt lead acid batteries = $620 buy 36v gel cell charger and use my 12v GEM batteries = $300 + Shipping buy controller and cabling and run the cart as 72v = cost of controller and new cabling..... Suggestions? |
04-03-2013, 01:11 PM | #8 |
Gone Wild
Join Date: Sep 2012
Location: Savannah, GA
Posts: 2,760
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Re: Six 12 volt Gel Cells in a 36v TXT
I just googled GEM 12v gel battery spec. If you post a picture of the battery (side and top) we can look up the exact Deka battery it really is.
If you run all batteries in series for 72v your range will be half what it would be at 36v. |
04-03-2013, 02:07 PM | #9 |
Gone Wild
Join Date: Jan 2011
Location: Las Vegas, Nevada
Posts: 1,942
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Re: Six 12 volt Gel Cells in a 36v TXT
Ya but you'll get there twice as fast lol.
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04-03-2013, 02:16 PM | #10 | |
Techno-Nerd
Join Date: Jun 2011
Location: West Virginia
Posts: 19,654
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Re: Six 12 volt Gel Cells in a 36v TXT
Quote:
Assuming the 36V and 72V motor/controller have the same efficiency and the cart weight and/or rolling resistance doesn't changed significantly,the cart will take about the same number of Watts to move it from Point-A to Point-B, so the run-time will be about the same with a 200AH 36V pack or a 100AH 72V pack. The most common example of this is the common practice of upgrading from 36V (6 x 6V 225AH battery) to 48V (6 x 8V 170AH battery). Both battery packs have roughly the same kWh of stored energy and the run-time stays about the same. |
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36v, charging, ezgo, gel cell |
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