Offshoreonly.com - Battery switch and charging question

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- - Battery switch and charging question (https://www.offshoreonly.com/forums/general-q/156954-battery-switch-charging-question.html)

ghittner

04-30-2007 10:39 AM

Quote:

Originally Posted by Payton (Post 2109831)

I like that idea.

Thanks for all the info guys. I was told very convincingly that if one battery is better than the other the charge will always go to the good one and the poor battery will get worse. But I don't think he was considering 2 altinaters and a battery switch.

I've never had that problem, I think it's a non issue... Don't over think this, it's a great way to go.

Croozin2

05-22-2007 12:43 PM

Quote:

Originally Posted by NightHawk (Post 2110465)

the batteries will fight each other until dead.

Precisely why many people (myself included) change batteries in pairs. When one battery begins to degrade and it's voltage begins to drop, it acts as a load on the good battery and continually drags it down. Remember, a difference of potential (voltage) is required for current flow. When this condition is present, you have a completed circuit. No different than leaving some accessory on.

Trippin

05-22-2007 05:44 PM

Quote:

Originally Posted by NightHawk (Post 2110465)

An isolator will work but the voltage drop accross it will mean it takes much longer running time to charge any one battery. The sense line will be connected to the selected battery but the other one will get the wrong charge profile. Not terrible but not perfect either.

WHAT??????

An Isolator is the correct solution to your problem, if you would like more descript guidance please feel free to email me.

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