New 48 Volt Battery Voltage Meter Reading

JWelch

New Member
I installed a new set of batteries and want to know what the battery voltage meter should be reading after full charge? It seems it fluctuates in the extremes.
 

HotRodCarts

Cartaholic
What kind of volt meter? A multi-meter or a state of charge meter on the golf cart? Here's a chart that shows battery percent of charge voltage. Welcome to Cartaholics Golf Cart Forum. :hattip: :usa:
 

JWelch

New Member
Thank you, it’s a charge meter. It seems the battery that connects to the motor is not charging properly but not sure. I had this suspect battery changed out yesterday and when I tested it after being replaced it was at 9.1v. This morning it was at 8.51v. I just took it out and it went down to 8.43 when the other batteries went up. Is there such a thing as breaking in new batteries and they charge up more the more you use them?
 

HotRodCarts

Cartaholic
A fully charged 8 volt battery should read around 8.49 volts once the surface charge is knocked off. Is the new battery the same make and model as the other batteries? It may take a couple charge cycles for the batteries to equalize.
 

JWelch

New Member
Yes it’s the same Brand and I only got a new set on 2/5 when we were out and the cart started shuddering and I checked the batteries. All were charged at 10v except 1 was at 7.3. That’s the one that was replaced
 

JWelch

New Member
They seem to connected properly. Will the charge increase with use?
 

Attachments

  • E2DE03AA-E4D4-40C9-AB5A-582C5EA779DB.jpeg
    E2DE03AA-E4D4-40C9-AB5A-582C5EA779DB.jpeg
    9.9 KB · Views: 6

HotRodCarts

Cartaholic
Yes, with new batteries you want to keep them charged and don't run the voltage down real low between charges. It takes a few charge cycles for the batteries to get up to full run time performance.
 

JWelch

New Member
Ok well that makes me feel better. All the other batteries I’ve had since the 5th are in the 10v’s
 

JWelch

New Member
after A ride when I plug them in all but one are at 10v and the replaced one is at 8.43v. After a charge they all kinda hover at 8.5 after a few hours
 

HotRodCarts

Cartaholic
Something doesn't seem right with the new battery only showing 8.43 volts while on the charger near the end of a charge cycle. I'd keep an eye on it during charging the next few times to see if the voltage goes up close to equal with the rest of the pack.
 

JWelch

New Member
It’s at 8.43 after I go about 2 miles. Then I charge it and it goes to 8.49. There is a wire going from the positive post to the motor (I think) on this particular battery. The battery is the rear pass side. Could this wire be preventing a higher charge or even a drain. What is this wire for?
 

Attachments

  • 5324C00F-E308-48CF-BED4-426C298F9A24.jpeg
    5324C00F-E308-48CF-BED4-426C298F9A24.jpeg
    60.5 KB · Views: 9
  • 95FA43E5-68F1-4E2A-B544-39C63274DA36.jpeg
    95FA43E5-68F1-4E2A-B544-39C63274DA36.jpeg
    83 KB · Views: 9

HotRodCarts

Cartaholic
I doubt that cable has anything to do with it seeing how the golf cart is running like it should. That cable should go thru the OBC and to the controller. Who put the ends on you cables? They don't appear to be crimped on very good. Here's a link to a wiring diagram for a 48 volt Club Cart DS like yours.
 

JWelch

New Member
🤔 so what do you think that is running to? There is another one running from the negative post on the opposite side too
 

Attachments

  • 504C8B15-6873-45BA-BC74-264A5F2625A5.jpeg
    504C8B15-6873-45BA-BC74-264A5F2625A5.jpeg
    66.9 KB · Views: 7
  • 9B1819D2-FCC7-4889-8E3E-CD21518B8DB3.jpeg
    9B1819D2-FCC7-4889-8E3E-CD21518B8DB3.jpeg
    75.8 KB · Views: 7

HotRodCarts

Cartaholic
It's probably connected to the controller at the other end like it should be. If it wasn't the golf cart wouldn't run.
 

Diode

Cartaholic - V.I.P. Sponsor
To me it's pretty obvious that one battery is out of the charge Loop that's why the others are overcharging that it is not charging
 

classycarts

Cartaholic
JWelsh, think I see your problem and Diode was right. Your only charging 5 batteries.

Move the charger small red 10gauge wire (circled in yellow) to the battery pos+ (circled in red). Then try charging the batts and do your testing.


1582839574907.png
 
Top