Page 1 of 4 1234 LastLast
Results 1 to 10 of 32
  1. #1
    Epic Contributor
    R.I.P.
    jinman's Avatar
    Join Date
    Feb 2001
    Posts
    21,014
    Location
    Texas - Wise County - Sunset
    Tractor
    NHTC45D, NH LB75B, Ford Jubilee

    Default Golf Cart Batteries - Gotta Love 'em

    A couple of years ago, I bought my brother a used golf cart for his birthday. It's a 2007 model Yamaha YDRE 48 vdc cart. It worked well until a couple of months ago and then just quit. He isn't very technically inclined and so I figured the battery terminals were just dirty based on what I'd seen a few months earlier. To make a long story short, I checked his batteries and found one that read 10.9 volts. That made me think he had a dead cell and so I brought the whole cart home with me to work on because he lives 1-1/2 hours away. Besides, I've been wanting to surprise him with a cargo box for the back instead of the golf bag well which he never uses.

    After getting the cart home and disconnecting all batteries, I found that three of them maintain at least 12.5 to 12.75 volts under load. When I tested the suspicious battery, it read about 11.2 volts. That tells me that something internal is probably beyond hope, but I thought I'd give it a try with the Epsom salts solution and try to see if I could get it back to a usable state. As it is, when I put the charger onto it, I cannot get charging current of much more than 2 amps. The internal resistance of this battery is extremely high. If hooked in series with the other batteries, it will kill any high current flow in the cart and the cart just shuts down. I'd normally just replace the battery, but these darn things are over $225 each after core exchange (Trojan T-1275, 280 hours at 25 amps, 83 lb battery. . . Whew!). I might as well give this one a good try before giving in.

    Yesterday morning, I mixed up two quarts of distilled water and 16 oz of Epsom salts. I heated it to around 175 F and got it completely dissolved in the water before putting it into my battery filler pitcher. Then I used a battery bulb to suck out the old acid and put it into a clean poly container. I couldn't get more than about 1-1/2 quarts out of the battery without emptying them out and I didn't want to do that. I refilled with the strong Epsom salt solution and started the charging. Right away, I noticed the cells were bubbling a bit. I know nothing happens really quickly with this method, so I left the charger running. After 18 hours, it was up to about 4 amps charge current. After 36 hours, it was about 8 amps charge current. I could never get it to charge at that rate before the Epsom salt.

    So after 36 hours, I decided to give the battery a load test. I have a 34 lb thrust trolling motor that I hooked to the battery. Of course, the motor is just spinning in the air, but before the rejuvenation, that motor would drop the battery straight to 9 volts. This morning it ran strong and I measured 12.5 volts while it was running. To add additional load, I hooked up a 12 volt headlamp and let it run. Between the two, the battery had no problem keeping them going for 1-1/2 hours. Since I don't have a load tester to put on that battery, I decided to increase the load by holding the propeller on the trolling motor for maximum current drain. I held the prop while flicking the switch up to 3. The motor hummed and the battery held. I went all the way to 5 (maximum speed) and suddenly the battery output dropped to 8.5 volts and the light got dim. It was like a switch had been turned off. I shut off the motor and the battery jumped back up to 9.5 volts and the light illuminated. I started the motor again without holding the prop and it ran slowly for about 30 seconds and then started whirring at full speed. I looked back at my meter and it said 12.5 volts.

    Just to ensure I was not seeing things, I tried the loading several more times and made sure the contacts were good on my battery clips. As before, the load would drop the batter output suddenly to 9 volts and then with less load it would run a few seconds and then pop back up to 12.5 volts like I had turned on an internal switch. I decided to let the battery run the motor and light for several hours and then recharge the battery more. This is starting to sound like a cell may be shorting out instead of just being sulfated. I don't expect to ever get this battery restored, but found it interesting to monitor its operation and see how it reacted so quickly to loading and then restored itself. It just appears that under light loading the battery works fine, but will not take a heavy charging or load current. I'll keep trying for awhile and see what happens when I charge it again after being discharged.

    In the meantime, I have a friend who works at a golf cart sales place. He's checking on a battery for me and may be able to get me a good deal. He volunteered to check on it for me and I really appreciate his efforts. I'm just glad all four batteries aren't bad. A full set is around $1k by the time you pay shipping. The things you do for family. . . .
    Jim


  2. #2
    Super Member Gary Fowler's Avatar
    Join Date
    Jun 2008
    Posts
    7,829
    Location
    Bismarck Arkansas
    Tractor
    2009 Kubota RTV 900, 2009 Kubota B26 TLB & 2010 model LS P7010

    Default Re: Golf Cart Batteries - Gotta Love 'em

    I have a 36 v cart and had to replace the batteries last summer to $850 bill. The shop said that likely I had one battery bad like you and it made the rest go bad. The charger kept trying to charge the bad battery because the voltage never would get to full charge even though the other 5 batteries were fully charged it kept chargeing till it burned up the other batteries.
    2010 LS P-7010C 20F/20R gear tractor & FEL, 2009 Kubota B 26 TLB, RTV 900 Kubota,17 foot Lund boat with 70HP motor, 2012-20 ft 12k GVW trailer, 2011- 52" Craftsman ZTR mower, 2013 Ferris Zero Turn, 3 weed whackers, pressure washer, leaf blowers, 7 foot bush hog, 8 foot landscape rake , 8 foot 3 PH disc, 2 row cultivator, 350 amp Miller AC/DC welding machine and all the tools needed to keep them all repaired and running.

  3. #3
    Super Star Member
    Join Date
    Jul 2011
    Posts
    14,436
    Location
    Yanceyville, North Carolina
    Tractor
    Kubota L4400

    Default Re: Golf Cart Batteries - Gotta Love 'em

    We have an EZGO 48 volt golf cart. I replaced the batteries last year and the price was around $750.00 which included all new cables. I was told that they should last around 7 years, if properly maintained.
    The PUPIL who does not surpass his Master, fails his Master.

  4. #4
    Veteran Member
    Join Date
    Mar 2010
    Posts
    1,860
    Location
    Ontario
    Tractor
    CT235

    Default Re: Golf Cart Batteries - Gotta Love 'em

    Jim, you pretty much have to change all the batteries at once, or at least find a matching set that are of equal age and performance. As was mentioned the newer battery will be destroyed by the charger in very short order.

    My first business was repairing golf carts in the summer.
    Tim.

  5. #5
    Elite Member Kyle_in_Tex's Avatar
    Join Date
    Oct 2002
    Posts
    4,531
    Location
    Giddings, Texas
    Tractor
    JD 4310,JD5420

    Default Re: Golf Cart Batteries - Gotta Love 'em

    The downside of electric carts. We have a 36v old EZGO in back that needs batteries. I think I figured 6 - 6volts at Sam's was gonna be about $515. Just don't have the cash right now. There is a reason the golf courses get new carts every 2 years, so they don't have to mess with battery replacement.

    Good write up Jim. I was hoping you might have raised it back from the brink.

    You mentioned year model '07. That's 5-6 years so, the inevitable is here. Someone needs to come up with a "piggy bank" / timer meter on these electric carts. It would have a slot to put the money and a timer to allow you to use it until your money runs out. Like a parking meter. That way, after 5 years of usage, you would have the $$$ to replace the batteries.
    there are 2 kinds of oats. Oats in front of a horse, and oats behind the horse.

  6. #6
    Epic Contributor
    R.I.P.
    jinman's Avatar
    Join Date
    Feb 2001
    Posts
    21,014
    Location
    Texas - Wise County - Sunset
    Tractor
    NHTC45D, NH LB75B, Ford Jubilee

    Default Re: Golf Cart Batteries - Gotta Love 'em

    Thanks guys! I finally gave up on getting the battery to fully charge. It actually was taking a charge, but one of the cells was shorting out under load. It would work under light loads, but dropped like a bomb under heavy current draw. It's toast. The other batteries are very strong. They were new in Nov 2009, so they are not very old. They all charge at exactly the same rate and come up to a steady charge state of around 12.8 volts. I'm not so sure that my brother did not put tap water in the one battery that failed. What is certain is that I will have to become more pro-active with checking his cart. I hate to say it, but I probably should have bought him a gasoline engine cart. I don't know if he can manage the electrical cart by himself.

    Tim, if the batteries were much older, I'd sure go with your suggestion to replace them all. I'm going to give this another try with a single replacement and then see if the cart holds up. After 6 months, I will have some idea of how the batteries are doing. Before I take it back to my brother, I'm going to run the cart down and recharge several times. I'll measure the individual battery voltages of each battery to get some idea of charging performance. I'll keep records and then recheck them every couple of months when he has the cart back. I've considered putting a cheap voltmeter on each battery, but I don't know where I'd mount four voltmeters.
    Jim


  7. #7
    Epic Contributor
    R.I.P.
    jinman's Avatar
    Join Date
    Feb 2001
    Posts
    21,014
    Location
    Texas - Wise County - Sunset
    Tractor
    NHTC45D, NH LB75B, Ford Jubilee

    Default Re: Golf Cart Batteries - Gotta Love 'em

    Quote Originally Posted by Kyle_in_Tex View Post
    You mentioned year model '07. That's 5-6 years so, the inevitable is here. Someone needs to come up with a "piggy bank" / timer meter on these electric carts. It would have a slot to put the money and a timer to allow you to use it until your money runs out. Like a parking meter. That way, after 5 years of usage, you would have the $$$ to replace the batteries.
    Kyle, the cart was used at a golf course until 2010. The batteries were then replaced before the cart was sold. The manufacturing date on the batteries is November 2009. That means they went into the cart in early 2010. They may not be even 3 years old. The original batteries in this cart were Trojan T-1275. The current batteries are US Battery 12V XC. So, this cart has already had the batteries replaced once probably less than 3 years ago. I'm thinking this battery did not die, but rather was 'killed.' Know what I mean?
    Jim


  8. #8
    Veteran Member
    Join Date
    Mar 2010
    Posts
    1,860
    Location
    Ontario
    Tractor
    CT235

    Default Re: Golf Cart Batteries - Gotta Love 'em

    Quote Originally Posted by jinman View Post
    Thanks guys! I finally gave up on getting the battery to fully charge. It actually was taking a charge, but one of the cells was shorting out under load. It would work under light loads, but dropped like a bomb under heavy current draw. It's toast. The other batteries are very strong. They were new in Nov 2009, so they are not very old. They all charge at exactly the same rate and come up to a steady charge state of around 12.8 volts. I'm not so sure that my brother did not put tap water in the one battery that failed. What is certain is that I will have to become more pro-active with checking his cart. I hate to say it, but I probably should have bought him a gasoline engine cart. I don't know if he can manage the electrical cart by himself.

    Tim, if the batteries were much older, I'd sure go with your suggestion to replace them all. I'm going to give this another try with a single replacement and then see if the cart holds up. After 6 months, I will have some idea of how the batteries are doing. Before I take it back to my brother, I'm going to run the cart down and recharge several times. I'll measure the individual battery voltages of each battery to get some idea of charging performance. I'll keep records and then recheck them every couple of months when he has the cart back. I've considered putting a cheap voltmeter on each battery, but I don't know where I'd mount four voltmeters.
    I use a 12V DC/AC inverter, with a constant AC load to test individual batteries. Set up a test bench and monitor battery voltage over time. Say two hours with a 100 W load. That will tell you a lot about their real condition.
    Tim.

  9. #9
    Platinum Member BigE_'s Avatar
    Join Date
    Sep 2007
    Posts
    603
    Location
    Near Portland, Oregon
    Tractor
    New Holland TC33D, LT4000

    Default

    Just curious, have you tried a desulphating battery charger? I've brought several batteries back from the dead with one of those. Even one with what appeared to be a shorted cell.
    New Holland TC33D w/7308 FEL, 6600 BH, 66" boxblade, and pallet forks.
    http://pens.bigelowsite.com

  10. #10
    Silver Member
    Join Date
    Mar 2007
    Posts
    152
    Location
    Garden Valley, Idaho
    Tractor
    Kubota RTV 900

    Default Re: Golf Cart Batteries - Gotta Love 'em

    Has anyone had any experience in changing from a 48 12 volt system to using 8 volt batteries? I have a 2004 Club Car that needs a new battery and the cart dealer says converting to 8 volt batteries is what everyone is going to since they last longer. Thoughts?

    Pap

Page 1 of 4 1234 LastLast

Similar Threads

  1. any golf cart owners?
    By RollingsFarms in forum ATVs & Utility Vehicles
    Replies: 33
    Last Post: 03-06-2011, 04:07 AM
  2. Golf Cart
    By Robby777 in forum ATVs & Utility Vehicles
    Replies: 5
    Last Post: 12-19-2008, 12:59 PM
  3. What's the best tires for my golf cart
    By stumpfield in forum Rural Living
    Replies: 11
    Last Post: 01-29-2007, 08:09 PM
  4. Need Sprayer For Golf Cart
    By Spencer in forum General Lawn & Garden
    Replies: 4
    Last Post: 05-12-2006, 08:51 AM
  5. The ultimate golf cart?
    By JayC in forum Photos
    Replies: 9
    Last Post: 09-25-2005, 04:21 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
© 2014 TractorByNet.com. TractorByNet is a registered trademark of IMC Digital Universe, Inc. Other trademarks on this page are the property of their respective owners.