chametzoo
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1960 Mobile Scout
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Post by chametzoo on Apr 21, 2023 9:20:41 GMT -8
Let's say I am putting two 6V golf cart batteries in series, to produce 12V for my trailer. The manufacturer's amp hour rating at 25A is 230. The rated "minutes of discharged" @ 25A is 448 minutes. Is all of the 448 minutes usable or is it only half of that, since that is the discharge limit that you can go to with a lead acid battery? Thanks, Mike
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newin62
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Post by newin62 on Apr 22, 2023 3:42:14 GMT -8
Hi Mike,
I'm not an expert but I have been researching the same thing. From what I have read in many places is that the rated capacity is always for completely discharging the battery. In order to maintain normal battery health and life expectancy, lead acid batteries should not be discharged to below 12 volts which is roughly 50% of the rated capacity when new. Although deep cycle batteries are more forgiving, many suggest not going below 50% with them either. (which I don't understand). That being said, I have never had much luck with my deep cycle trolling motor batteries even though I am fairly diligent with the charging.
I am seriously considering the LiFePO4 option so I don't have to worry about it.
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chametzoo
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1960 Mobile Scout
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Post by chametzoo on Apr 22, 2023 8:47:17 GMT -8
Hi Mike, I'm not an expert but I have been researching the same thing. From what I have read in many places is that the rated capacity is always for completely discharging the battery. In order to maintain normal battery health and life expectancy, lead acid batteries should not be discharged to below 12 volts which is roughly 50% of the rated capacity when new. Although deep cycle batteries are more forgiving, many suggest not going below 50% with them either. (which I don't understand). That being said, I have never had much luck with my deep cycle trolling motor batteries even though I am fairly diligent with the charging. I am seriously considering the LiFePO4 option so I don't have to worry about it. Thank you! |
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Post by wisconsinjoe on Apr 25, 2023 17:54:30 GMT -8
I think newin62 is correct: of the stated amp hours, with a deep cycle battery you are not supposed to use more than 50% without recharging. I'm not sure about the low limit of current voltage that equates with 50%. I thought it was something lower than 12 volts.
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