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Unread 02-07-2016, 08:34 PM   #1
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Question How do I charge 48 volt battery pack with 12 volt chargers?

I've heard of using 2) 12 volt automotive type battery chargers in series to charge 3) 8 volt cart batteries at a time but can't seem to find instructions on exactly how to hook the chargers up ,help would be appreciated on how to do this.
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Unread 02-07-2016, 09:21 PM   #2
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Default Re: How do I charge 48 volt battery pack with 12 volt chargers?

Here is what I did a few days ago.

Was asked to try to get an '03 Club Car going. Batts had been left off charger for long time. Total for 6 batts was under 2 volts.

Charged each with 12 volt charger one at a time for 6-8 minutes up to 5.8 - 6 volts. Plugged in charger and no go. Hooked 12 volt charger up to last batt and tried again and cart charger started. (powercharge III)
Amps were at about 3.

On 2 of the batts voltage was too low to turn on the automatic 12 volt charger. I hooked the charger across 2 batteries, (the previous charged batt and next to be charged), this gave enough to start charger. Let it run for a few minutes. Then removed and hooked only to last battery being worked on.

This was done with digital volt meter hooked up to each battery being charged. .

At no time did the batteries seem to heat.

Total process took about one hour.
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Unread 02-07-2016, 09:31 PM   #3
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Default Re: How do I charge 48 volt battery pack with 12 volt chargers?

boxes are two chargers , leads to each other and the left over black to neg and red to pos
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File Type: jpg batt 12 volt.jpg (70.7 KB, 0 views)
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Unread 02-07-2016, 09:45 PM   #4
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Default Re: How do I charge 48 volt battery pack with 12 volt chargers?

Quote:
Originally Posted by glassk View Post
boxes are two chargers , leads to each other and the left over black to neg and red to pos
Thanks glassk this is the procedure I was looking for


Thanks Arbd for the information you shared as well,if the 2 chargers don't accomplish what I'm looking for I will follow your directions .
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Unread 02-07-2016, 10:23 PM   #5
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Default Re: How do I charge 48 volt battery pack with 12 volt chargers?

glassk, that is a much better explanation of that process than I have seen. Looked for the info to no avail so used second method. Will definitely store that in my files.
big mule, will watch for your results.
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