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Electric EZGO Electric EZ GO Marathon, Medalist, TXT and RXV. |
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02-16-2011, 10:49 PM | #1 |
Not Yet Wild
Join Date: Feb 2011
Location: Wills Point,TX
Posts: 48
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05 PDS question
I dont know if I have a problem or not. It seems like after the first 10 minutes of driving I loose alot of my get up and go. It has a problem going up inclines but will still move good on flat ground. I load tested my batteries tonight and they showed good. What else can I look for?
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02-16-2011, 11:06 PM | #2 |
Happy Carting
Join Date: Dec 2007
Location: Southern California
Posts: 73,419
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Re: 05 PDS question
How did you load test your batteries?
Can you attach a meter to the pack and drive? |
02-16-2011, 11:12 PM | #3 |
Not Yet Wild
Join Date: Feb 2011
Location: Wills Point,TX
Posts: 48
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Re: 05 PDS question
I used a 100 amp load tester. Yes I can attach a meter and drive. Should I hook to batteries or charging port. What am I looking for?
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02-17-2011, 12:59 AM | #4 |
Gone Wild
Join Date: Jan 2011
Location: Murray KY
Posts: 219
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Re: 05 PDS question
We just got an 100 amp load tester and it did not fail these old deep cycle batteries that I have been playing with when each has dead cells it it. It stayed in the high yellow and were not even fully charged by any means. We can go like 20 miles and it will still go up hills at the same speed where the SOC is at 100% or 50% per the GPS MPH feature. It is a 2007 PDS with Oct 2006 T-105 batteries.
Look at getting some new battery cables that gets the power to the controller. There is about 8 of them but scottyb can be specific on that. When I used the temp gun on all the battery connects after some hard hill pulls I found some heat rise. When I replaced them the old ones was swollen up due to green powder build up inside the plastic outside jackets. Based on our case cables should be well inspected after 5 years and replaced if needed I expect. Wal-Mart has a simple 4 ball specific gravity (SG) tester for $1.54 that is a no brainer to read (unlike the $9 I got at NAPA). If you have any cells after the charger kicks off that do not pop all balls in a flash to the top of the tester you can bet your batteries are sulfated to the point it is hurting performance. Do not count any lazy balls that just float up ever so slow. If at 1.275 all four will POP up top. Counting the lazy balls will give you a false high readout because like the four ball antifreeze testers they are ball park estimation of the true values. If you do not have any like dead cells a BatteryMINDer can help get the crystal sulfate off the plates. We bought the 36v version from this source. http://www.batteryminders.com/batter...n-p-16143.html I hooked up the free 12v meter at the head light wiring connection at the batteries and pulling any kind of hill it will stop it from burning even read due to the voltage drop. |
02-17-2011, 07:10 PM | #5 |
Not Yet Wild
Join Date: Feb 2011
Location: Wills Point,TX
Posts: 48
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Re: 05 PDS question
Ok, I just took the cart out after a full charge. My starting voltage at the charge jack was 38 volts, I drove around for about 30 minutes at normall speed and I finished at 32 volts. The voltage fluxuated while driving and accelerating down to 28 at times. Does that tell you anything?
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02-17-2011, 10:42 PM | #6 |
Gone Wild
Join Date: Jan 2011
Location: Murray KY
Posts: 219
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Re: 05 PDS question
It seems like they are showing their age. Next time before you put it back on the charger let it sit for an hour and check the voltage after some recovery time. The larger the bounce back the better.
I may be wrong because I am just comparing to our 2007 PDS with Oct 06 batteries. After two hours (about 20 miles) we tested at 36+ before any resting time. As a question what amp readout to you get when you first connect the charger to the bank and how long is it before the charger finally tops off the battery bank? Our charger is labeled 36v 21a on the back but even after the 20 miles it only hit 12 amps for maybe two minutes then settled on 10 and tapered from there. From my normal charging experiences the charger will peg the meter after much use then start the taper. I think the readout may be 25 but as noted I have never seen it over 12 and only for a couple minutes. Others see the same or with a heavy discharged bank does your EZGO automatic peg briefly? It would charge the bank faster if it would start at 25 then taper. |
02-17-2011, 11:10 PM | #7 | |
Happy Carting
Join Date: Dec 2007
Location: Southern California
Posts: 73,419
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Re: 05 PDS question
Quote:
Draw down testers are made for golf carts. Based on your usage results I would say your batteries are toast. Good batteries will run that cart 90 minutes. Your batteries are at about 30% or less capacity based on your lowest voltage reading..... I hope this helps. And Gale your interest in learning about golf carts and golf cart batteries is great but you need to check and double check your info before handing it out as gospel. That ball float tester you got is for antifreeze NOT BATTERY SPECIFIC GRAVITY readings. You need a dial gauge with temperature compensating readings. Any good auto parts house will have one. Leave the floating balls for checking the antifreeze. |
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02-18-2011, 02:49 AM | #8 | |
Gone Wild
Join Date: Jan 2011
Location: Murray KY
Posts: 219
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Re: 05 PDS question
Quote:
Do not give your mistake a second thought because I too get confused. http://www.buggiesgonewild.com/elect...unction-6.html Read what DrBob posted in post #55 about floating ball battery testers. That is the type battery tester I posted about. http://www.corradoworld.com/article/batteries-101.html Here is a picture of one that has been in use for 25 years. It is similar to the one I got at Wal-Mart the other day for $1.54. I can see how younger guys could confuse these battery SG testers and antifreeze testers. The key is to read the package and look at the printed values on the glass tube. http://www.jcwhitney.com/motorcycle-.../p2006082.jcwx While on the high side here is a floating ball battery tester from JC Whitney. http://www.ehow.com/how_7456626_use-...ry-tester.html Just a bit if info for those interested in floating ball battery testers. scottyb if you ever try a pocket size SG floating ball battery tester you will understand why they are better for most cart owners than the kind you use because we are looking for gross info unlike you when tweaking for the race track. If they are off by a ball that is still fine. When we are looking at a cart or some used batteries for $1.54 we can learn all we want to know. If each cell floats 4 balls at is great. If they all float 2 balls that is still cool. We start getting concerned when testing a 6v battery and every cell floats a different number of balls. Keep in mind scottyb many of us grew up without electronics and battery powered this and that in the shop. A buck floating ball battery tester could find dead cells and the SOC at a glance. There was nothing to plug in or batteries to replace to check out a wet cell battery. Not good but a very common way to check a battery in the field was to short the posts with a wire and judge from the spark and pop if it was enough to start the vehicle. |
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02-18-2011, 05:47 AM | #9 | ||
......................
Join Date: Apr 2009
Location: FT Lauderdale FL.
Posts: 16,416
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Re: 05 PDS question
Hey Gale maybe you should read that link again, because you may be the one that started early
Now when a man has been in the biz since 1945 I think I would listen to him Quote:
Quote:
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02-18-2011, 09:37 AM | #10 |
Happy Carting
Join Date: Dec 2007
Location: Southern California
Posts: 73,419
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Re: 05 PDS question
"However a good OLD FASHIONED UNIT with a ACCURATE SINGLE FLOAT HYDROMETER WITH TEMPERATURE CORRECTING SCALE is still the gold standard.. One day, I will get another one of them."
The above is Quoted from your own references ???? |
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