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Unread 02-14-2016, 08:55 PM   #1
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Default New batteries

I just converted from 12v to 8v batteries, modified cart and put charger on . Charger has been on for about 3 plus hours do i shut it off or let it turn off by itself. 2005 cc precedmt. I can smell the sulfer from batteries. Whst do u guys think. Obc still working i did not disconnect.


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Unread 02-14-2016, 09:01 PM   #2
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Default Re: New batteries

Let it do its thing and shut off on its own.
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Unread 02-14-2016, 09:05 PM   #3
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Default Re: New batteries

If it doesn't shut off after 16 hours then you have a problem, but not until then...
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Unread 02-14-2016, 09:45 PM   #4
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Thanks for the quick response i was getting a little worried


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Unread 02-14-2016, 10:09 PM   #5
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Default Re: New batteries

Did you install new cables?

Is the battery pack ground cable, still running through the OBC?


The charger may have to take a 48V battery pack up to 67V, or above, to fully charge it.
On the other hand, 59V may fully charge a 48V battery pack.
The voltage it takes to fully charge a 48V battery pack depends on who manufactured the batteries in the pack as well as their age and condition.

By definition, a lead-acid wet cell is fully charged when the specific gravity of the electrolyte ceases to increase while a charging current is passing through it. Since open-circuit voltage increases/decreases as the electrolyte's specific gravity increases/decreases, open-circuit voltage is an indirect or secondary means of monitoring the electrolyte's specific gravity and is often used to do so.

An ideal charger would monitor pack voltage and when it ceased to rise over a predetermined period of time, it would stop the regular charging mode and go into a float charge mode, however few, if any, chargers typically used by golf cart owners are ideal. Most of them simply shut off at a predetermined voltage that is high enough to almost fully charge most battery packs without being so high that repeated use would significantly harm battery packs that are fully charged at the lower end of the typical voltage spectrum needed to fully charge a battery as determined by empirical data.

Here is Trojan's recommended charge curve for a single (2V) deep cycle wet cell. There are 24 cells in a 48V battery pack, so do the math and you get 58.80V to 66.96V. However, Trojan uses an electrolyte that is 27.7% sulfuric acid by weight (SG = 1.277) and other battery manufacturers use different concentrations, so the on-charge voltage that is typically reached when their batteries are fully charged, will be higher or lower.
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Unread 02-15-2016, 07:24 PM   #6
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Installed new 2awg cables , i let charger run until it stopped i checked my meter on cart it said only 48% charged. Any suggestions?


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Unread 02-15-2016, 07:47 PM   #7
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Default Re: New batteries

If you installed new 2ga cables. what did you do with the cable running throught the OBC?.
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Unread 02-20-2016, 10:26 AM   #8
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Havnt changed that one yet


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