Join Date: Aug 2006
Location: Arlington, VA
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No, it's not too far, provided....
1. that you don't skimp on the cabling -- type and size; and
2. that you provide a proper-sized CPD (circuit protection device...fuse or breaker) near the batteries.
I assume you're talking about a house battery bank, not a starting bank. And, I further assume you're talking about a Pearson 365...not a huge boat.
Assuming modest/typical loads for a boat this size, I'd use nothing smaller than AWG 1/0 cabling. And, I'd install an ANL fuseblock and fuse near the batteries, sized for the maximum load expected.
Keep all connections clean and tight...use a proper crimper and heat shrink tubing.