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Battery question

Old 02-12-2020, 06:28 PM
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I have a 1986 Wellcraft 2900 Sportbridge with twin Chevy 350's. I have three batteries on board. Should there be one starting battery for each engine and one deep cycle house battery?
Old 02-12-2020, 06:32 PM
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Yes. I actually run 4. 1 for each engine, 1 house, and 1 for electronics
Old 02-12-2020, 06:35 PM
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That is the way my boat was set up from the factory. I did take out the house battery to make room and use one of the start batteries for the house also, making sure I shut off the other starting battery when anchored just in case. Interstate makes a dual purpose starting/deep cycle battery.
Old 02-12-2020, 08:43 PM
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Originally Posted by Guarneri View Post
I have a 1986 Wellcraft 2900 Sportbridge with twin Chevy 350's. I have three batteries on board. Should there be one starting battery for each engine and one deep cycle house battery?
with the ability to parallel and acr for charging
Old 02-12-2020, 08:50 PM
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I only use deep cell batteries and I have big block 8.1's (496). Absolutely no reason deep cells can't be used for starting. Been doing it for years. Never been a problem.
Old 02-12-2020, 09:00 PM
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Keep the batteries isolated and use a voltage sensitive relay to combine them when the engine starts. The two start and one or two house is the "norm"--but there are a number of ways to go. I like the separate electronics battery, and that is basically the way mine is set up, with a separate bank for freezer, refrigerator, microwave and induction burner (the latter two via a PSW inverter).

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