Join Date: Apr 2003
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Four batteries are sufficient for normal cruising use. As for location, are you aware that seawater and battery acid produce chlorine gas when combined? That is the only major drawback to wet cell batteries on boats. If you are planning to place batteries below the sole I would seriously consider making the compartment watertight and providing it with a snorkel into a high spot in the engine compartment. By products of charging are hydrogen and other gases that you do not want to breathe. Antoher item you want to invest in is a specific gravity tester, this will allow you to identify weak cells. Not all batteries are good even if new. Once you leave the states warranty replacements will become a headache.
There is a lot of battery information in the Ample Power website, some of it is self serving but most is very informative. Don''t forget about proper size fuses there should be one coming out of the alternator and another between the battery bank and the electrical panel. The only unfused connection allowed is between the batteries and the starter motor.