lifted club cars - lifted ezgo
Home FAQDonate Who's Online
Go Back   Buggies Gone Wild Golf Cart Forum > Golf Cart Repair and Troubleshooting > Electric EZGO
Electric EZGO Electric EZ GO Marathon, Medalist, TXT and RXV.



Post New Thread  Reply
Thread Tools Display Modes
Unread 02-13-2019, 11:33 PM   #1
Gone Wild
 
Join Date: May 2016
Location: Central Alabama
Posts: 501
Default 6 month old 12v Crown Batts testing at 48 minutes

6 month old set of 12v crown batteries in 2013 RXV load tested at 48 minutes at 56 amps (rated at 103). Batteries draw down relatively equal (within a 10th of a volt).

Cart has been used regularly, but no where near golf course level. Batteries have never become fully discharged (owner would not have know how or had means to recharge one by one to get charger started).

Charged with QE charger. 51 volts after full charge and cart had sat for a while. Water level is good now, but can't say 100% for certain if owner over/under watered them in the past.

I doubt this is a case of 4 batteries and the culprit does not appear to be a single defective batt. Any ideas or ways to ascertain what problem is and prove what caused it?
rockfordpi is online now   Reply With Quote
Alt Today
BGW

Golf car forum Sponsored Links

__________________
This advertising will not be shown in this way to registered members.
Register your free account today and become a member on Buggies Gone Wild Golf Cart Forum
   
Unread 02-14-2019, 05:12 PM   #2
Gone Wild
 
bronsonj's Avatar
E-Z-GO
 
Join Date: Jan 2013
Location: Saint Petersburg, FL
Posts: 1,206
Default Re: 6 month old 12v Crown Batts testing at 48 minutes

I thought the chargers would click on at a very low voltage, like 30v or some such number. So just because he didn't ask for help with a charger not clicking on doesn't mean he didn't over-deplete the batteries.

If he ran the batteries to 48.4v which is 50%, the cart could still run although it should have stopped and been charged.

Under-watering could be a problem. Leaving them in a low (or even moderate) state of charge will sulfate the batteries too. I'd doubt he has 4 factory defective batteries, so if I were to put my money on what caused it I'd say he would run it, maybe pull down the and not charge. Then run some more and pull it down more. Then eventually charge when he felt like it or felt the cart going too slow. Still plenty of V for the charger to kick on and still way to low for the batteries to sit for any length of time.

Good rule of thumb, if you park it and are not planning on using it in the next hour or so, plug it in if possible. Regardless of what % the batteries are at. And never go below 50% SOC.
bronsonj is offline   Reply With Quote
Unread 02-14-2019, 11:48 PM   #3
Over This Interview Is...
 
cgtech's Avatar
Yamaha
 
Join Date: Jun 2012
Location: AZ
Posts: 13,557
Default Re: 6 month old 12v Crown Batts testing at 48 minutes

Wait! I thought those crowns were the "Trojan killers" according to everyone. Oh, nevermind.. the T-1275 class battery is just the pits. Sorry for the fun at their expense. It could be a charging problem I suppose, but those SC are supposed to be on the current standard Dv/Dt profile (Ezgo says "don't worry about brand, it's dv/dt anyway" (probably horse **** to get me off their phone). What voltage at the end of charge cycle?
cgtech is offline   Reply With Quote
Unread 02-15-2019, 04:54 AM   #4
Gone Wild
 
Join Date: May 2016
Location: Central Alabama
Posts: 501
Default Re: 6 month old 12v Crown Batts testing at 48 minutes

Quote:
Originally Posted by cgtech View Post
Wait! I thought those crowns were the "Trojan killers" according to everyone. Oh, nevermind.. the T-1275 class battery is just the pits. Sorry for the fun at their expense. It could be a charging problem I suppose, but those SC are supposed to be on the current standard Dv/Dt profile (Ezgo says "don't worry about brand, it's dv/dt anyway" (probably horse **** to get me off their phone). What voltage at the end of charge cycle?
52 volts after rest. Crown advised me to charge with different charger and retest. Original charge was with JUNK QE charger, though it did show full charge. Will check specific gravity and re-retest.
rockfordpi is online now   Reply With Quote
Reply
Go Back   Buggies Gone Wild Golf Cart Forum > Golf Cart Repair and Troubleshooting > Electric EZGO


Thread Tools
Display Modes


Similar Threads
Thread Forum
load testing batts??? Electric Club Car
Help me pick trojan vs crown 8v batts Electric EZGO
Crown and Trojan Battery Info just received from Crown dealer Electric EZGO
Testing out B4 puchasing new Batts Electric EZGO
New Batts, one last thread on Batts from me Electric EZGO


All times are GMT -5. The time now is 09:21 AM.


Club Car Electric | EZGO Electric | Lifted Golf Carts | Gas EZGO | Used Golf Carts and Parts

Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Content Relevant URLs by vBSEO ©2011, Crawlability, Inc.