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Battery management and battery switch

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Just got a "new to me" 2022 A22.   It has a factory installed battery switch with options 1, 2, 1&2.

Historically, I've always had a relay (and switch) in my boat with a dedicated stereo battery.  You could run the battery dead with the stereo, and the boat started great.  Additionally, the starter battery was never taxed, so that battery lasted longer.  A deep cycle battery wasn't needed for starting either.


All of that to say, what do you guys do with a 1-2 switch?   How do you manage your batteries and make sure you don't get stuck?

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Given what you are used to, just replace the switch and install a blue sea ACR.  Use what you are used to and familiar with.

Unfortunately you need to put the parts together because you want the "big" ACR but need a mini switch to fit in the factory location.  So it's a little more expensive than an add-a-battery kit, but not the end of the world.



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With this switch, and if you are one to drop anchor and chill for a number of hours, the ideal setup would be a cranking battery on one input and a deep-cycle ( if both are wet cell) for the house side. 

Run on the cranking or in 1&2 position and rotate switch to house position when engine is off. this keeps the main cranking isolated in reserve. 

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