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Unread 12-09-2014, 04:01 PM   #61
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Smile Re: 48-Volt Battery Maintainer

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Originally Posted by Olman View Post
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.
OLMAN!

I have just about decided to purchase one of these maintainers, from granite digital...... if you know ..Is this company a safe place to hand out my credit card, over the phone?.Hoping for somebody to push me over the edge ..so to speak. thanks olman and Merry Christmas to you bob s
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Unread 12-09-2014, 04:12 PM   #62
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Default Re: 48-Volt Battery Maintainer

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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.
Well that it significant, the 4 12s I use now after once year has dropped off considerable when I use it and I do my best to keep them up. I do find the difference from the 8 volt batteries in your example and the 12 volt batteries not much difference in life expectancy in your example as the 6 volts batteries, assuming the conditions are all the same. My brother-in-law cart has 6 8volt batteries in his cart, maintains well but after three years his seems to be still kicking compared to my 12s. I know isn't apples to apples as he has a DS & I have a precedent.
I guess the only consideration would be cost of adding two extra batteries and hopefully getting another year out of them.
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Unread 12-09-2014, 04:53 PM   #63
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Default Re: 48-Volt Battery Maintainer

bsa_bob...

fwiw...I ordered directly for Granite Digital w/my AXP credit card...no "hacking" issues (so far...!!!)
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Unread 12-09-2014, 05:04 PM   #64
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Default Re: 48-Volt Battery Maintainer

Perhaps I am a bit late to the thread, but why not just buy a charger that has Float Charger built-In? No need to buy a small float charger not capable of charging a battery. Something like a Japlar 48 Volt 15 amp?

Plug it into your cart and walk away and forget about it. When you come back the batteries are 100% ready to go.
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Unread 12-09-2014, 05:09 PM   #65
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Default Re: 48-Volt Battery Maintainer

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Originally Posted by bsa_bob View Post
OLMAN!

I have just about decided to purchase one of these maintainers, from granite digital...... if you know ..Is this company a safe place to hand out my credit card, over the phone?.Hoping for somebody to push me over the edge ..so to speak. thanks olman and Merry Christmas to you bob s
Bob---I did not buy direct from Granite Digital but I ,in my experience with them, would not hesitate to do a credit card deal with them. Merry Christmas to you too. If I can help in any way, please let me know.
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Unread 12-09-2014, 05:09 PM   #66
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Default Re: 48-Volt Battery Maintainer

$180 difference thats why lol

We know they make these charger and you can bypass the OBC.
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Unread 12-09-2014, 05:15 PM   #67
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Default Re: 48-Volt Battery Maintainer

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Bob---I did not buy direct from Granite Digital but I ,in my experience with them, would not hesitate to do a credit card deal with them. Merry Christmas to you too. If I can help in any way, please let me know.
What i needed to know. thank you Olman bob s
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Unread 12-09-2014, 05:17 PM   #68
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Default Re: 48-Volt Battery Maintainer

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Originally Posted by Olman View Post
Bob---I did not buy direct from Granite Digital but I ,in my experience with them, would not hesitate to do a credit card deal with them. Merry Christmas to you too. If I can help in any way, please let me know.
What i needed to know. thank you Olman bob s
Do you know? where they are located by chance ,i could still call from mich tonight if in Ca thanks
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Unread 12-09-2014, 05:33 PM   #69
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Default Re: 48-Volt Battery Maintainer

located in CA...

http://www.granitedigital.com/contact-us.aspx

http://www.granitedigital.com/saveabattery.aspx


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Unread 12-09-2014, 05:39 PM   #70
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Default Re: 48-Volt Battery Maintainer

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Originally Posted by sunking View Post
Perhaps I am a bit late to the thread, but why not just buy a charger that has Float Charger built-In? No need to buy a small float charger not capable of charging a battery. Something like a Japlar 48 Volt 15 amp?

Plug it into your cart and walk away and forget about it. When you come back the batteries are 100% ready to go.
Sunking---I do have a charger that has a float charger built in. The "factory"charger holds my pack at 52 volts. The Save-A-Battery unit keeps the pack at 54.5 volts. The "small" charger is capable of charging the pack. In fact, I use it almost exclusively to charge unless I am going to use the cart on a long run before the "small" charger completes the cycle. I use the small charger because I believe in the pulse charge technology to help desulfate the pack. I know you think it is snake oil but I don't. I and my friends have used this charger with great results. And I do just what you said. I "plug in my cart and walk away and forget about it. When I come back the batteries are 100% ready to go." Look, I was very sceptical when my buddy told me about it. I tried it. It worked well. Could not be easier and it was $75. I am not trying to sell anybody this thing. I am very happy with it after using it on two different carts and thought I would share. Every once in a while someone comes up with a better mouse trap. Don't poopoo it til you have tried it.
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