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Unread 12-05-2014, 04:51 PM   #51
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Default Re: 48-Volt Battery Maintainer

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Originally Posted by Olman View Post
Dave---reread post 16. The charger I use (48 volt Save-A-Battery), will charge my golf cart batteries quite well just not as fast as your "big" charger. While my cart is on the charger and the batteries are at full charge, it keeps the pack at 54.5 volts in the maintenance mode. From time to time the charger sends pulse charges into the pack to help desulfate them.

Bsa-Bob----If I am understanding your post, you are asking if the Save-A-Battery is ok to use on your "high dollar gel batteries". If so, the engineers and literature says it is fine for gel cells. DON'T use a 36 volt charger on a 48 volt pack. You might find more info on the charger at GraniteDigital.com. That company makes the charger. You can go to the site, get their phone number, and be able to talk to their techs. Good people and they will answer all of your questions. They did for me.
I went back and looked at pg 35 Iam sorry i didn't get back to you olman .thank you for the link you gave me, here i go again with brain fade cheers bob s Merry Christmas
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Unread 12-05-2014, 05:53 PM   #52
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Default Re: 48-Volt Battery Maintainer

You get more range with more Amp Hours (at the same total voltage) The 6V batteries tend to have higher Amp Hour ratings so you will get more range with 8 6V than with 6 8V but the cart will have to support the additional battery weight. (and volume)
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Unread 12-08-2014, 08:55 PM   #53
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Default Re: 48-Volt Battery Maintainer

OK...my 48v save-a-battery charger arrived on Sat. and I hooked it up immediately. My cart is now in storage and had been on the CC charger so the batteries were probably charged as much as possible with that particular charger. FWIW...my (4) 12v US Batteries are stamped "D1" which I believe indicates April '11. The cart came from a NY golf course and the batteries must be replacements as the cart is a 2008 1/2. When the time comes to replace them, I expect I will do the 6/8v setup as my tub is set up for either. Meanwhile, I hope to eek out as much as I can before I spring for new batteries (and probably cables). The charging voltage is now holding at 50v and I will be going away for 2 weeks on vacation. It will be interesting to see how much/if there is a change in that voltage...
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Unread 12-09-2014, 08:31 AM   #54
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Default Re: 48-Volt Battery Maintainer

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Originally Posted by flkeysdude359 View Post
...The cart came from a NY golf course ...
I now believe we have discovered the root of your entire problem. All you need to do is a complete strip down, toss all NY parts, and a simple rebuild using ScottyB kits and parts will solve all of your cart issues. NY sourced carts always have issues. It's part of what they are.
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Unread 12-09-2014, 10:58 AM   #55
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Default Re: 48-Volt Battery Maintainer

Thank you for the astute observation. I was simply attempting to contribute to the forum. I didn't realize that I had a problem...
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Unread 12-09-2014, 12:05 PM   #56
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Default Re: 48-Volt Battery Maintainer

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Originally Posted by flkeysdude359 View Post
Thank you for the astute observation. I was simply attempting to contribute to the forum. I didn't realize that I had a problem...

I was just poking fun at ya. Actually, right now my oldest daughter lives in NY. Even on that island too which they refer to as "long". Well, at least for another year until her contract is up, unless they extend it or she decides to accept it or move on.

BTW, if your going for new batteries you may want to consider going to 8 6-volts. This will give you about 20% more run time. The two additional batteries can fit in the bag well. Of course, if your using the bag well...that will present a problem.

Just a thought.

Dave
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Unread 12-09-2014, 01:05 PM   #57
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Default Re: 48-Volt Battery Maintainer

DaveTM...not a problem at all. I'm cranky this morning..., scratchy throat, what with the weather and dealing with a procrastinating tenant...

I appreciate your thoughts and all the helpful information on the forum...my best to you and yours for a safe and happy holiday...
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Unread 12-09-2014, 01:50 PM   #58
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Default Re: 48-Volt Battery Maintainer

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Originally Posted by flkeysdude359 View Post
OK...my 48v save-a-battery charger arrived on Sat. and I hooked it up immediately. My cart is now in storage and had been on the CC charger so the batteries were probably charged as much as possible with that particular charger. FWIW...my (4) 12v US Batteries are stamped "D1" which I believe indicates April '11. The cart came from a NY golf course and the batteries must be replacements as the cart is a 2008 1/2. When the time comes to replace them, I expect I will do the 6/8v setup as my tub is set up for either. Meanwhile, I hope to eek out as much as I can before I spring for new batteries (and probably cables). The charging voltage is now holding at 50v and I will be going away for 2 weeks on vacation. It will be interesting to see how much/if there is a change in that voltage...
Those 12 volt batteries are getting a little old and you don't really know how they were taken care of but hopefully the little charger will help bring them up. My steady on charge voltage is 54.5 now and started out IIRC at around 52 volts. Keep your fingers crossed.
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Unread 12-09-2014, 02:07 PM   #59
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Default Re: 48-Volt Battery Maintainer

I wanted to recheck my numbers so I just checked it again with my DVM. Charger is connected and it's reading now reading 54v while on the charger...fingers crossed...!
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Unread 12-09-2014, 03:52 PM   #60
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Default Re: 48-Volt Battery Maintainer

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Originally Posted by scooterman View Post
I always fully charge mine with the original charger then disconnect it and plug the maintainer. I don't think it is necessary to leave the charger in because the maintainer will hold the state of charge.

I just got back from the camp and again the maintainer held the batteries at a higher state than the charger would. My issue is I have 4 12v batteries and with the area being so hilly I don't think they will last more than two three years. I'm thinking after two years I'll replace them with 6 8v batteries or maybe 8 6v batteries being the high demand I may want to add two more to get the most life out of them. I'm not sure how much longer life to expect from 8 6v batteries over 6 8v batts.
I don't usually venture into the CC area, but the topic caught my eye.

The useable lifespan of FLA cart batteries depends on the average State of Charge (SoC) maintained throughout their lifespan, and other factors.

It sounds you maintain your batteries exceptionally well, charge after each use, float charge, Etc., so the other factors can be eliminated from the equation. Your cart usage (length of trips, weight carried, terrain drive on, Etc.) will also be fairly constant. That means the average SOC maintained is totally dependent (or nearly so) on the AH capacity of the batteries used in the battery pack.

Basically, if your average trip used 67.5AH, the average SoC of an 8 x
6v pack of T-105 (225AH) batteries would be 70% while the average SoC of T-875 (170AH) batteries would be about 60% and for T-1275 (150AH) batteries the average SoC would be about 55%.

Therefore, if the nominal lifespan for a T-105 based pack was 5.6 years in your cart, a T-875 pack would last about 4.3 Years (23% shorter) and a T-1275 pack would last 3.9 years (30% shorter).

Attached is a list of batteries commonly found in 48V packs and their estimated lifespans. (Based on life expectancy data from Trojan Battery) The percentages are relative comparisons to a 225AH battery pack.
Attached Images
File Type: jpg Battery lifespan comparisons.JPG (159.2 KB, 0 views)
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