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  #21  
Old 12-31-2013, 12:10 AM
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GoneBoatN GoneBoatN is offline
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I mounted a Guest 2611 charger in the boat next to the power switch. It is a 3 stage dual battery charger. When putting the boat away, I simply plug in the charger and forget about it.

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  #22  
Old 12-31-2013, 08:44 AM
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Originally Posted by rydog View Post
Thanks for the info. Does this make sense: Since I have 2 batteries, 1 for audio and 1 for starting, I will get a single bank shore charger and use that after every trip to charge the audio battery. The starting battery should remain pretty much fully charged if I use it to only start the boat and charge it anytime the boat is running using the alternator.

Also any suggestions on a good single battery that could power my 3 amp set up for a good portion of the day, assuming I will be shore charging it every night.
Honestly, I would go with a 2-bank charger. Even though the main cranking battery rarely gets depleted, a 2-bank smart charger will keep it maintained and conditions during the off season or long periods of no use.

I would go with the largest/highest Ah AGM battery you can fit, if only going with a single house battery.
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  #23  
Old 12-31-2013, 02:51 PM
rydog rydog is offline
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I have no idea what a high Ah battery is? My current battery is just a low end AutoZone battery. When talking Ah, what is a decently high rating?
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  #24  
Old 12-31-2013, 03:36 PM
waterlogged882 waterlogged882 is offline
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  #25  
Old 12-31-2013, 04:31 PM
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Tristarboarder Tristarboarder is offline
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What's the black box with the yellow stripe in the middle?
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  #26  
Old 12-31-2013, 05:02 PM
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Kweisner Kweisner is offline
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Originally Posted by Tristarboarder View Post
What's the black box with the yellow stripe in the middle?
That'd be a Blue Seas Automatic Charging Relay if I am not mistaken.
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  #27  
Old 12-31-2013, 05:09 PM
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Kweisner Kweisner is offline
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Originally Posted by rydog View Post
I have no idea what a high Ah battery is? My current battery is just a low end AutoZone battery. When talking Ah, what is a decently high rating?
Rydog, high Ah is "amp hours" and it is basically a measure of a battery's strength. So while voltage remains fixed (technically) at 12 volts, the amp hours reflect the stamina, or how long (hours) the battery can deliver a decent amount of current (amps). Hope that helps. There are much smarter people than me on this topic that I am sure would be more eloquent in explaining!
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  #28  
Old 12-31-2013, 05:30 PM
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Quote:
Originally Posted by rydog View Post
I have no idea what a high Ah battery is? My current battery is just a low end AutoZone battery. When talking Ah, what is a decently high rating?
When looking at a cranking/starting battery, you would want one with a high CA = cranking amp. For a house battery, you'ld want one with a high Ah = amp hour. Its a measurement of the batteries ability to deliver a set amperage for a length of time while maintaining above a usable voltage level.

With deep-cycle and AGMs, their Ah rating typically falls in line with its size. Larger/heavier battery = higher Ah. Most batteries are sized according to a group number, but not all. A typical marine deep-cycle group-24, commonly used as an OEM battery, will have in the neighborhood of 65 Ah and a larger group-29 might have about 100.
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  #29  
Old 12-31-2013, 06:18 PM
rydog rydog is offline
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Alright I understand what you mean now. When I was buying batteries last summer I do not think I looked at the Ah rating at all, only CA....Is there anyway to calculate, based on the amps that will be hooked up to the battery, how long a certain battery with X Ah will last, approximately?
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  #30  
Old 12-31-2013, 06:54 PM
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Originally Posted by rydog View Post
Alright I understand what you mean now. When I was buying batteries last summer I do not think I looked at the Ah rating at all, only CA....Is there anyway to calculate, based on the amps that will be hooked up to the battery, how long a certain battery with X Ah will last, approximately?
Its an estimate at best because the amps current draw is never constant, even with the volume at a set level.
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