Battery Help

Automotive powered airboat discussion.
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wilkersonbj
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Battery Help

Post by wilkersonbj » Sun Feb 04, 2018 4:21 pm

I have a 472 Cadillac and last night while gigging my alternator shorted out and it's shot and it melted the wires. I only have one battery now. I was wanting to install a second battery and run and change selector to one designed to run individual or both batteries. Planning on writing motor to one and all the gigging lights, power pole and GPS to other, and using selector switch to change accessory battery.

My question is that a good idea or should I do it different.

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SWAMPHUNTER45
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Re: Battery Help

Post by SWAMPHUNTER45 » Mon Feb 05, 2018 9:39 am

You can use a dual battery set up with a Perko switch if you wanted. They typically install with a shared ground and the hot or positive isolated.
What will occur is when ever the battery selector is engaged on #1 the #1 battery will be feeding power and receiving a input from the alternator to charge it. The #2 battery will be isolated and off line until you switch it over or select the "both" option. That would allow you to keep a fully charged battery in reserve.

The single wire GM alternators work well I would think that is what your using. Mine is the 63 amp series but they have some that exceed 100 amp if that fits your need better. Most auto stores have a wide selection in stock.

wilkersonbj
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Re: Battery Help

Post by wilkersonbj » Mon Feb 05, 2018 10:07 pm

Thank you for the advice. I think I'm Gunna go with two batteries and a higher amp alternator

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Rick McC.
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Re: Battery Help

Post by Rick McC. » Wed Feb 07, 2018 11:25 pm

I’ve been running the Perco switch and dual batteries in boats for many years without issue.

I currently have that same setup in both an airboat and a pontoon boat.
"Sights are for the unenlightened."
Rick
http://guntipsandtalk.com

terrible ted
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Re: Battery Help

Post by terrible ted » Thu Feb 08, 2018 1:04 pm

The switch is also good to shut the bastteries off from posible drains when not in use.

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Rick McC.
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Re: Battery Help

Post by Rick McC. » Thu Feb 08, 2018 11:19 pm

terrible ted wrote:The switch is also good to shut the bastteries off from posible drains when not in use.
Yes, it is.

I always shut everything off (except the auto bilge pumps) that way.
"Sights are for the unenlightened."
Rick
http://guntipsandtalk.com

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