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Unread 05-03-2011, 12:47 PM   #1
Getting Wild
 
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Default Overcharging, need some input

Hello;
I've read through some of the past threads on this issue and am looking for a little more insight. I have 2 1995 Club Car 48Vs with 2 good chargers. every winter i charge the batteries and then store them in the basement, the carts are in a non insulated building for the winter. both ran and charged fine pre-storage. After reinstalling the batteries one cart is overcharging, doesn't matter which charger. I was away from the business for a couple days due to the weather and it boiled the batteries dry and was still on when i returned. I refilled, it does run the charger, haven't taken any voltage readings on them yet, but i read where a bad cell can cause this, as can the OBC. Do the directions for resetting the OBC work with a '95? (just has the key switch and FNR lever.) I intend to sell this cart, even have a buyer lined up, but wont' sell it unless i know that it will charge and run off this battery pack. Anyone got a market value estimate for a '95 with bad batts? I have a deal for 1,500, but that's with somewhat decent batteries.
Thanks guys, someoen make it stop raining too please
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Unread 05-03-2011, 03:26 PM   #2
The Last Moja Morani
 
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Default Re: Overcharging, need some input

you can do a reset with the 95...............your chargers should shut off at 16 hours are you sure the low voltage sensors in the chargers arn,t bypassed?? i would open the charger and look its a powerdrive charger right? it should shut off..........i think i would want to know...........have they ever shut off? is this something that just started? can,t imagine 2 carts doing the same thing at the same time.................................
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Unread 05-03-2011, 08:11 PM   #3
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Default Re: Overcharging, need some input

It's just one of the carts doing it. doesn't matter which charger I use on it, it's overcharging it. the other cart charges normally with either charger. I went over both chargers last year, everything was wired correctly and working fine. some of the atteries might have gotten mixed during the reinstall. I originally had a fleet of ten that I'd pull hte batteries on each fall and I'm certain they got shuffled around every time. The batteries are Apr. '06 Exides, all bought in one load.

On the OBC reset, i take it I ignore any instruction regarding "Tow" and just use the FNR lever?
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Unread 05-03-2011, 09:30 PM   #4
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Default Re: Overcharging, need some input

reset the OBC. drive the cart 20min or so. charge while closely monitoring. repeat.

some OBCs take a few cycles to recalibrate after first powering up. a bad battery can also cause the charge cycle to last too long, but i would try the reset & discharge/charge thing before throwing money at the problem. a DVM and a single float hydrometer will help you identify a problem battery.
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Unread 05-04-2011, 08:08 AM   #5
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Default Re: Overcharging, need some input

Thanks, I'll try the reset cycle. Not going to throw any money at it, if it's the batteries, it'll be sold as-is with the issue disclosed to the buyer.
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Unread 05-04-2011, 08:29 AM   #6
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Default Re: Overcharging, need some input

1995 CC with 5 yr old batteries.
Since the obc controls charging it may be that the OBC went bad. That is common for a 95 with 1st generation OBC.
It may have failed in a way that made it not shut off. Or a bad battery may have kept the pack from reaching cut off voltage. Either way.... Charging dry batteries is about the fastest way to kill batteries I know of. ... sounds like your cart will need fresh batteries and possibly a newer obc.
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Unread 05-09-2011, 08:47 PM   #7
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Default Re: Overcharging, need some input

Or for proof positive , to determine if it is batteries or cart .
swap batteries between the 2 carts
if it follows batteries then - Wala - bad batteries ,
if it stays with original cart then OBC
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Unread 05-10-2011, 10:24 AM   #8
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Default Re: Overcharging, need some input

i'm leaning towards the batteries, the other cart isn't holding a good charge for long at all. going out to check my pack voltage.
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Unread 05-12-2011, 01:48 PM   #9
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Default Re: Overcharging, need some input

turned out to be a battery with a bad cell in each cart. A quick swap gives me one workable cart. The other is going to get 2 new batteries ....not my call to make, can't get the boss to pop for a new pack. going rate around here for the cheapest (crown) is 110. with exchange. Does that seem about right?
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Unread 05-12-2011, 03:36 PM   #10
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Default Re: Overcharging, need some input

thats about right its a little higher here for good batteries anywhere from 95 to 120 a pop.........................................
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