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Unread 05-29-2016, 09:52 PM   #11
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Default Re: From 8 volt Trojans to Continental XHD-31 12 volt batteries

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The average start battery loses 1% of its capacity every time it deep cycles
Can you cite a reference for that number.
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Unread 05-29-2016, 10:39 PM   #12
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Default Re: From 8 volt Trojans to Continental XHD-31 12 volt batteries

In my experience they lose more than that. Start batteries are very different than deep cycle batteries.
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Unread 05-30-2016, 12:43 PM   #13
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Default Re: From 8 volt Trojans to Continental XHD-31 12 volt batteries

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loses 1% of its capacity every time it deep cycles
Probably true - but by definition, deep cycle means (nearly) flat - which is punishing for that type of battery. If his cart drives only 500 yards per day (like the amount used starting a cold diesel), the negative impact may be negligible.

Personally I wouldn't waste the money trying them. They will certainly die an early death because the battery technology in those is totally unsuited to installation in a golf cart. Although its anyone's guess as to how quickly they will fail.
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Unread 05-30-2016, 02:13 PM   #14
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Default Re: From 8 volt Trojans to Continental XHD-31 12 volt batteries

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Originally Posted by theboss20 View Post
First and foremost Group-31 batteries were designed as START batteries not deep cycle and even though they will take a lot of abuse they still are NOT built to "cycle" like a golf cart battery does. Also the 8v battery pack will out-preform the 4-12v battery pack any day of the week and many of us have taken our later model Club Cars and changed them over to 8v instead of the 12v for just that reason.
I've got a 2012 GEM e4 and the OEM batteries were Group-31 gel batteries (8G31). I just dropped $1700 on a new set that I plan to install over July 4th weekend. (The GEM is 72V so there are 6 batteries.) The OEM batteries were in a fully discharged state for many months before I bought the cart so I'm assuming that the batteries only lasted 4 years because they had been abused. I'm hoping for more longevity out of the new ones.

TJ
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Unread 05-30-2016, 04:01 PM   #15
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I am using some 12v C&D Technologies 140Ah deep cycle AGM batteries made for battery backup in telecom applications. Have only been using them for a year in my Marathon, but they are working great. Range is ~10-12 miles per charge- discharged to 50% SOC. Not the same batteries as yours, but another data point for 12v batteries.

The telecom backup batteries can be had for cheap as they are commonly required to proactively replace them after 1-3 yrs.
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Unread 05-30-2016, 05:22 PM   #16
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Default Re: From 8 volt Trojans to Continental XHD-31 12 volt batteries

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Range is ~10-12 miles per charge
That's not a lot of range.
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Unread 05-30-2016, 09:44 PM   #17
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Default Re: From 8 volt Trojans to Continental XHD-31 12 volt batteries

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Originally Posted by jjance View Post
That's not a lot of range.
Maybe not, but it suits the application for me, and was offered to the OP as a data point.
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