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Re: Thoughts on whether I should relocate my house batteries ...
Best battery chemistry?
You might want to hide your credit cards and then define "best". Right now that would be lithium, if best means "performance". That would also give you well more than double the power capacity in the same space--meaning the existing box would be big enough.
If "best" means most economical...wet lead still does that, short term. If the amusing claims for number of cycles for lithiums are correct, they'd come out as "best" for long term price, too.
It was just unclear from the pix whether removing the woodwork might clear up enough odd space to allow for more batteries in the same larger space. And then, if you can shelf out over the curve of the hull, that might also expand things. Or, dare I mention that AGMs have their pros and cons, but being installed off-level is one of the big pros.
And if your starting battery is really just used as the "who left the stereo on?!" emergency starting battery, it can be surprisingly small and light, so that also opens alternatives. House banks really don't mind engine starting as a routine duty.
Moving the batteries all forward (and that means all, if you want them all to charge at the same voltage) means heavy cables, or compensating for voltage drop in the cables, and of course running a vent hose out someplace. Not impossible, just would seem "better" if you could keep them by the engine.
Last edited by hellosailor; 12-25-2017 at 06:58 PM.