Fully charging your batteries after each discharge on a live-aboard cruising sailboat is simply not practical. Instead, most of us will cycle our batteries between 50 and 80% of their capacity. The bad news is that this will ruin your lead-acid batteries (regardless of type) in a distressingly short time due to sulphation.
But there is an answer to this problem: regular equalization, a process where you deliberately overcharge your batteries for a specified time and voltage to remove the sulphation.
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