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Old 09-09-2016, 09:30 PM   #11
Lt. JG
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Join Date: Aug 2016
Location: Sandpoint Idaho
Posts: 30

One / Both / Off

Another question if anyone knows

The boat actually has two starting batteries and one power battery

The switch for "One" goes to the two starters
The switch to "Both" activates all three

The switch to "Off" kills all power

Sooooooo during the winter do I have to switch to "Both" when I want to charge all the Batteries ????


Is the switch only for Output power and the Charger/Input is separate and always active ??? so I switch it to "Off" and the charger becomes active from Shore Power ???

I have no problem tracing power, but if anyone already knows the answer it would save time

V/R glen

2000 Maxum 2400SCR "Bada Bing Bada Boom"
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Old 09-09-2016, 10:20 PM   #12
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Join Date: Feb 2012
Location: Perry Hall, Maryland
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I cannot say for certain but the battery charger is mist likely a dual bank. Mine is wire directly to my two batteries so I can have the switch in the off position and still charge them. I know with your model boat does not chime in you will need to trace the wires from the charger to see where they go.

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Old 09-09-2016, 10:56 PM   #13
Join Date: Nov 2014
Location: Portland, OR
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My suggestion would be to check battery voltage prior to plugging in to shore power with a voltmeter on the batteries, then plug in and switch from Off/One/Both. Should be pretty obvious if charging
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Old 09-12-2016, 12:11 PM   #14

Join Date: Apr 2008
Location: New London, Ct.
Posts: 3,236

Is your battery charger running through the battery isolation switch or are the charging leads from the charger going directly to the battery terminals??

I prefer to connect the charger directly to the batteries and allow the isolation switch to dictate which bank is being drawn from. This also allows you to maintain a charge to the battery without any potential draw on the system.

Boating; The act of spending large amounts of time rushing around like crazy, in order to sit around doing nothing.
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2400scr, generator, shore power

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