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Unread 02-25-2013, 04:14 PM   #1
Not Yet Wild
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Join Date: Feb 2013
Location: Monroe Louisiana
Posts: 18
Default 86 CC voltage drop

I have a 86 model 36 volt CC with resistor coils system. I replaced the batteries about 8 months ago.
It doesn't seam to have much get up and go and it runs out of power really quickly.

I charged it over night and checked the voltage the next day, it read 37.4 volts.
So then I hooked up a volt meter and ran the cart. It starts out at 37.4 volts then drops to 34 volts when under power.
I also checked the SG and it read as shown on the attached diagram.

What should a good 36 volt pack be when fully charged?
It looks to me like my batteries are bad even though they are only 8 months old.
What do you think?
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Unread 02-25-2013, 04:26 PM   #2
Gone Wild
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Join Date: Feb 2010
Location: Florida
Posts: 184
Default Re: 86 CC voltage drop

Check this sticky. State of Charge Readings.

Your pack is not fully charged. You are only getting charged to about 80-85%. Fully charged your specific gravity should read 1.277 per cell. 37.4 pack voltage is about 78% according to that sticky. I would say your batteries are bad or your charger is. Did you get golf cart deep discharge batteries?
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Unread 02-25-2013, 05:36 PM   #3
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Default Re: 86 CC voltage drop

jantrree

Yes they are golf cart batteries i got at sams club.
Here is the info they had on them.

ENERGIZER
GOLF CART
GROUP SIZE GC2
220 AMP HOURS
6 VOLT
RELIABLE CYCLING ABILITY

I checked the voltage on the pack after the charger had been charging for a while and it was increasing to over 44 volts.
Do you think the charger is ok if the voltage is increasing like this?
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Unread 02-25-2013, 06:13 PM   #4
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Default Re: 86 CC voltage drop

Quote:
Originally Posted by yellerdog View Post
jantrree

Yes they are golf cart batteries i got at sams club.
Here is the info they had on them.

ENERGIZER
GOLF CART
GROUP SIZE GC2
220 AMP HOURS
6 VOLT
RELIABLE CYCLING ABILITY

I checked the voltage on the pack after the charger had been charging for a while and it was increasing to over 44 volts.
Do you think the charger is ok if the voltage is increasing like this?
Your best bet it to wait for TahoeDawgZ71 to reply. He has forgotten more about club cars than any of us will ever know. Is your charger an automatic charger? If so, let it run until it turns itself off. Then check voltage about 12 hours after that to get true pack voltage.
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Unread 02-25-2013, 06:15 PM   #5
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Location: Southern California
Posts: 64,060
Default Re: 86 CC voltage drop

44-46 is normally the finish voltage for a 36v charge. however, you should have 38.2 12 hours after the charge has completed. A drop of 3 or 4v under load is okay but it looks like you are not holding a full charge 12 hrs after the cut off?
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Unread 02-25-2013, 06:22 PM   #6
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Default Re: 86 CC voltage drop

Yellerdog you might want to talk to ScottyB about converting your coil system to solid state. Looks like it can be done very inexpensively. Check out his web site.
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