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post #90 of Old 04-15-2019
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Re: Realistic expectations for my house batteries

Originally Posted by john61ct View Post
Yes but that's a boat design / mfg issue.

It would take an innovative maker to do it.

99% of boat buyers do not consider living off grid for long periods of time.

Most get back to shore power quite frequently.

And the "waterproof battery bank" that continues to operate under a flooded bilge, well that is not trivial, not in the boatbuilder's wheelhouse, at all.

I think it's possible to create that, aftermarket to suit any boat, have some ideas along those lines if you start a new thread.

But no, just adding more weight is not a universal improvement. The naval architect designed the optimum, and 99% of off-grid cruisers are already loaded way heavier than they intended.
OK, I admit I was a bit flippant when I say we crave weight. And obviously there are limits (certainly reached when the outside water level reaches the gunnels

I just wanted to make the point that we put literally TONS of lead into the keel (of monohulls) that does nothing but being heavy. Since one standard complaint about batteries (in particular if they are lead-based) is their weight, why not make it an asset rather than a liabillity.
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