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Old 07-26-2018, 06:48 PM   #1
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6+12

I currently have two 6v 220 min @ 20 amp reserve batteries in series on my TT. Will there be any charging issues if a add a third battery in parallel to this circuit that is a 12v 90 min @ 25 amp reserve? All are deep cycle. The 6v are wet and the 12v is an AGM if that matters. I thought I read where they all need to be the same reserve capacity for some reason.
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Old 07-26-2018, 07:07 PM   #2
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Don't do it...
AGM charges at slightly different rates and at different voltages then flooded... the AGM or the other two will not charge correctly...

the rule is to not mix battery types/ages in any kind of matrix
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Old 07-26-2018, 07:07 PM   #3
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I would not...

This might help make your decision...

https://www.optimabatteries.com/en-u...eries-parallel
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Old 07-26-2018, 08:27 PM   #4
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18. How did I do?

Sorry, seriously that combo will probably shorten batt life severely.
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