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Unread 07-29-2019, 08:16 PM   #1
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Default Battery Amp Hours

My batteries have two different amp hour ratings. Which one do I use to figure the pack amp hours? And if it's the c/20 does that mean I have a 600 amp pack if I have 4 12s? And if so that seems pretty low. Like roughly how many miles would that take me?



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Unread 07-29-2019, 09:01 PM   #2
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Default Re: Battery Amp Hours

Yes, you use the C/20 rating of 150 Amp Hours. The Amp Hour rating of the whole pack will be 150.

When the batteries are connected in series, as yours are, the voltage is additive so you have 48V for 4x12V batteries but the AH are the same as for one battery (a parallel connection does the opposite and would give 12V and 600 AH).

As for the miles, that depends on the state of the batteries (age, usage patterns, maintenance etc).
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Unread 07-29-2019, 09:08 PM   #3
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Default Re: Battery Amp Hours

Roger that.

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Unread 07-30-2019, 06:51 AM   #4
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Default Re: Battery Amp Hours

The AH of the pack is the same as the lowest AH battery in the series, so if one of the batteries can only deliver 100AH, you have a 100AH pack even if the other 3 batteries could deliver 150AH.
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Unread 07-30-2019, 09:02 AM   #5
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Default Re: Battery Amp Hours

And yes 150 is considered smallish as the standard benchmark is 170 for an 8 volt 48 volt battery pack.
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Unread 07-30-2019, 09:16 AM   #6
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Default Re: Battery Amp Hours

He has 12v batteries and 150AH is the same as a Trojan T-1275.

I agree that 6 x 8v makes a better pack for a golf cart (8x6v is just too heavy for most applications).
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Unread 07-30-2019, 09:35 AM   #7
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Default Re: Battery Amp Hours

Quote:
Originally Posted by Sergio View Post
He has 12v batteries and 150AH is the same as a Trojan T-1275.

I agree that 6 x 8v makes a better pack for a golf cart (8x6v is just too heavy for most applications).
Yes I should have expanded on that... A cart with 4x12V simply has a smaller gas tank than a cart with 6x8V with an 8x6V having the most range but at the expense of weight...
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