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Equipment & Gear => Power Equipment & RV => Topic started by: Blacklab on February 21, 2013, 10:55:22 PM


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Title: Duel Batteries
Post by: Blacklab on February 21, 2013, 10:55:22 PM
Hey all, I'm want to run 2 batts on my 2009 1500 silverado. I have a 95 amp alternator and the isolators I've seen are for 90 amps. Will this work, or do I need a bigger isolator. Thanks
Title: Re: Duel Batteries
Post by: timberghost72 on February 21, 2013, 11:42:56 PM
Why are you adding a second battery and why do you want to isolate it. Answers to this will determine the best set up for you.

Depending on why you are adding a second battery you may not want or need to isolate it. Just run in parallel to the other battery. No need to spend a bunch on an isolater and switch set up if you don't need to.
Title: Re: Duel Batteries
Post by: Blacklab on February 22, 2013, 11:25:24 AM
 For the added accessories. Just wondering if I can hook up to a 95 amp alt w/ a 90amp isolator or do I need a bigger isolator.
Title: Re: Duel Batteries
Post by: coachcw on February 22, 2013, 11:54:56 AM
It will work fine . If your ussing it for a camper you may just want to use a continous duty solinoid though . if you just want more cranking power I'd just run # 4 or bigger cable from positive to positve on the Batteries.
Title: Re: Duel Batteries
Post by: Blacklab on February 22, 2013, 10:43:19 PM
Thanks coach  :tup:
Title: Re: Duel Batteries
Post by: huntnphool on February 22, 2013, 11:13:08 PM
It will work fine . If your ussing it for a camper you may just want to use a continous duty solinoid though . if you just want more cranking power I'd just run # 4 or bigger cable from positive to positve on the Batteries.
You might consider a larger alternator as well. You will find most dual battery setups are running alternators of 130 amp or larger. :twocents:
Title: Re: Duel Batteries
Post by: Special T on February 23, 2013, 08:16:44 PM
IMO you don't need 2 batteries with that alt.... I ran a normal alt in my S10 with 2 ultimas for my winching... Had one go bad and killed them both..... Since you seem to think you need 2 it is smart to use an isolator, I would use one of the marine style that can isolate either or use both.
http://www.westmarine.com/webapp/wcs/stores/servlet/ProductDisplay?productId=17356&catalogId=10001&langId=-1&storeId=11151&storeNum=50523&subdeptNum=50543&classNum=50547#.USmUFmf3iMg (http://www.westmarine.com/webapp/wcs/stores/servlet/ProductDisplay?productId=17356&catalogId=10001&langId=-1&storeId=11151&storeNum=50523&subdeptNum=50543&classNum=50547#.USmUFmf3iMg)
Title: Re: Duel Batteries
Post by: timberghost72 on February 24, 2013, 10:41:50 AM
You do not need an isolator for running added accys. The point of an isolator is to power things up while your truck/boat is not running. That way you dont kill your main battery and end up stuck needing a jump. If you just add a few accys just put a bigger alternator on or add a second battery.  There is no reason for you to put an isolator on. Even if you are adding a winch a dual battery set up works just fine without an isolator. Most people don't winch enough to kill 2 batteries. If you are just adding some lights and other small accys don't bother with 2 batteries. Just buy a good quality battery. Sounds like thats what you are doing?
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