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Unread 03-06-2011, 09:29 PM   #1
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Default Battery trouble

I have a 2000 ezgo txt I have converted to 48vlt. 8-6vlts 4 guage wire, 700 amp alltrax, and all the other upgrades including an inboard 48vlt charger. Six of my batteries(original set) are t105 bought in 2007. When I did the conversion in 2008 I bought two more which were excide. I have run the whole set completely dead approx 3 times and pretty close a few others. This last year I really noticed a quick decline in the life of a charge and it is half of what it was a year ago. I had planned on replacing them all but I checked them today and all the t105 and one of the excides show 6.21-6.24 and one of the excides shows 6.17. This is after the cart has been off a full charge and sat for about a week. I had my wife get in the cart, hold the brake and push the accelerator. The cart would drop to as low as 5.43. Any body have any ideas.
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Unread 03-06-2011, 09:33 PM   #2
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Location: Southern California
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Default Re: Battery trouble

Sounds like your batteries are done for. They hold a surface charge but fade fast under load. Typical of 3-4 yr old batteries.
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Unread 03-06-2011, 10:04 PM   #3
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Default Re: Battery trouble

What should they hold at under load
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Unread 03-07-2011, 08:22 AM   #4
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Default Re: Battery trouble

Can anyone give me the numbers 6 vlt batteries should read on a meter after a full charge without a load and also with a load on them.
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Unread 03-07-2011, 09:21 AM   #5
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Default Re: Battery trouble

Under a load the pack my read down to 45-46v momentarily, depending upon the load. The situation with your batteries is they can not sustain a load because the plates are likely very sulfated, based upon information you have given and their age. Here is the battery chart for reference on fully charged etc.
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Unread 03-07-2011, 09:55 AM   #6
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Default Re: Battery trouble

Thanks scotty, I am still planning on getting the set of cables from you but hnas been tight. I am fixing to drop about 1600 on it between batteries, cables and a double selinoid f/r set up
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Unread 03-07-2011, 10:04 AM   #7
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Default Re: Battery trouble

I have the reversing contactor for the F&R. Actually costs a little less and only one solenoid to mount.
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Unread 03-07-2011, 03:35 PM   #8
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Default Re: Battery trouble

Do you have any info on it, I am planning on moving the two extra batteries from my bag well and putting them under my seat. So I need to put a new F/R instead of the rotary style and move my charger and controller. Any extra info or ideas would be appreciated.
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Unread 03-07-2011, 04:33 PM   #9
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Default Re: Battery trouble

You need this and a F&R rocker switch like Ezgo uses ... It is beefy .

# 400 Amp Maximum Thermal Current Rating
# 12, 36, 48 & 72 Volts
# Paired Single Pole, Double Throw on Common Bracket for motor reversing
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Unread 03-08-2011, 05:37 PM   #10
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Default Re: Battery trouble

how does it hook up and doe you just need a F/R switch to make it work. My controller is a 700 amp and a D&D 8.5 hp high torque, will that be a problem?
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