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Installing 2nd battery

Installing 2nd battery

Postby Collins.T [OP] » May 22 2012, 2:43am

So ive been thinking for a while to install a 2nd battery in my truck to run all my extra stuff (system, fog lights, and more lights to come). Has anyone done this recently? Besides the battery, what all do I need? would I need a alternator with more amp output? the one I have now is 130 amps I believe. thanks guys
2001 Chevy Silverado 4x4 Ext. cab:
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Flowmaster Super 44's
Zone 2.5" leveling kit with Rancho Suspension
17" Moto Metal's w/ Nitto Trail Grapplers
Kenwood/Focal sound system
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Related Topics  2nd battery in 2001 1500?   2nd battery tray... alternator question?   adding a 2nd battery to a 2014 Sierra   Unlocking the radio after installing a new battery   07 2nd Suspension   No first gear. Have 2nd, 3rd and OD. Please Help!   2nd gear start   2nd to 3rd gear noise   No 1st or 2nd gear on 4L60E transmission   Transmission slips between 2nd and 3rd gear   L460E hard shifts and sticks in 2nd   Off Road Driving 1st,2nd,3rd or D   Rough 1st to 2nd shift in 07 Silverado   2004 Silverado hard shift from 1st to 2nd...solutions? 
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Re: Installing 2nd battery

Postby B Cubed » May 22 2012, 2:50am

You're gonna need a dual battery isolator.
2011 Silverado LT 5.3L 4x4 Ext-Cab
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Re: Installing 2nd battery

Postby Collins.T [OP] » May 22 2012, 2:57am

So on that Isolator, any suggested amperage I should get? I not running any crazy electrical load like a winch or anything. maybe like a 120?
2001 Chevy Silverado 4x4 Ext. cab:
Volant CAI
Superchip cortex Programmer
Flowmaster Super 44's
Zone 2.5" leveling kit with Rancho Suspension
17" Moto Metal's w/ Nitto Trail Grapplers
Kenwood/Focal sound system
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Collins.T
Firing on 3 cylinders [L1]
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Re: Installing 2nd battery

Postby B Cubed » May 22 2012, 3:03am

Depends on your needs. I'd discuss it with an isolator retailer in your area or contact a manufacturer and discuss it with them.
2011 Silverado LT 5.3L 4x4 Ext-Cab
Blue Metallic w/Silver Stripes, A.R.E., Magnaflow, AirAid, Hellwig, inTuned by Lew

Audio by Advent, Morel, JL, R.F., Polk, MTX, Kicker, & Audio Enhancers

Cars & Guitars baby!
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Re: Installing 2nd battery

Postby TexasEdition » Jun 05 2012, 5:32am

You dont HAVE to run an Isolator. You can run the batteries in Parallel. An Isolator is to protect both batteries from running down and leaving you stranded. If you run them in parallel, the alternator charges both batteries equally, but it also draws current from both batteries. If you go without an Isolator, make sure to wire them correctly and not wire them in Series or you will really screw up your electrical system because you will be doubling your voltage from 12 volts to 24 volts with the ignition off and 14 volts to 28 volts with the engine on
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