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Posts: 117
Location: Cheyenne, WY most of the year | I previously had two 12v batteries installed in parallel to provide cranking and all my electronics needs. It worked great, never left me stranded.
Now with my new boat I want to do the same, but do I need a battery switch? It seems like if I'm hooking them up in parallel, they'll charge off the motor when in use as needed. What's wrong with my thinking? Thanks everyone |
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Posts: 1759
Location: new richmond, wi. & isle, mn | If you're wired in parallel 12v, you'll charge in parallel. Shouldn't matter. |
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Posts: 166
| No need for a switch, due to what jchiggins mentioned above. |
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Posts: 479
Location: Northern Illinois | The main reason for a switch is to isolate your load. You are less likely to drain the batteries by leaving something on accidently if you have a switch to turn everything off at the source. I have 3 circuits each with its own switch: trolling motor, electronics, and accessories (lights, pumps, etc. from the starter battery). Never put a switch between the battery and motor.
Edited by RLSea 5/30/2023 10:25 PM
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Posts: 482
| Never put a switch between the battery and motor.
Why not ?
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Posts: 1200
Location: E. Tenn | danlaboucane - 5/31/2023 5:26 AM
Never put a switch between the battery and motor.
Why not ?
It fails, (and they do, just often enough) and you have nothing. |
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Posts: 479
Location: Northern Illinois | Yes ^^ and switches aren't engineered to handle the current surge motor starters demand. One of the first things a Mercury mechanic will check when you have a motor problem is battery connections and +cable condition. Proper voltage level is very important for modern motors to function well. If you put a switch in there besides, it's just another possible place for voltage drop. |
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