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Old 03-19-2013
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AGM batteries

I have a few questions I am thinking someone out there knows the answers to. My boat came with three group 27 AGM batteries with two in a house bank and one as a starter battery for my Perkins 4.108. I would like to combine the three current batteries into the house bank and buy an actual starter battery for the diesel.

My house bank currently resides in two typical battery container boxes and if I try to put the third in the same area it would not fit in its own box. Do AGM batteries need to be in boxes or just secured? If they need to be in boxes I will likely fabricate a box that fits all three.

I am thinking of getting a typical lead acid starter battery for the diesel. I'm wondering if I'll have a problem in mixing batteries between the two systems. I never allow both banks to interact and have a separate charging system for both when I'm plugged in to shore. The problem I think might occur when the ACR combines the bank when I'm charging while motoring. Any thoughts on this?

Also, any recommendations on the size of a starter battery I'll need?


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