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05-10-2013, 07:11 PM #11
05-10-2013, 07:28 PM #12
09-25-2013, 08:10 PM #13
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- Sep 2013
09-25-2013, 09:33 PM #14
I don't think that it would "overwork" the alt. Basically the alternator is just going to keep both batteries charged. If you are not killing the battery now with one battery (because the alt can not keep it charged) then I highly doubt that there would be any damage from 2 batteries. Actually, I would think that it would prolong your alt life, as when you need more power there is another source and the alternator does not need to run at max production to keep up with your needs. Sure, if somehow you killed both batteries and attempted to use the alternator to charge them both at the same time, then you may have an issue. But, even with one battery it is never a good idea to recharge a dead battery with your alternator. An alternator is meant to maintain your battery charge, not recharge a dead battery. I believe that an isolator is always a good idea. I just like the fact the you can tailgate/ party with the radio on (or multiple things charging) and the truck off for hours, you run off of one battery. Lets say that that battery completely dies. You always have the other battery at full charge to restart the truck and get you home. You get home, recharge the dead battery and all is good. This is just my opinion, I am sure others will chime in.
1995 Silverado 4x4
6" BDS Suspension Lift-3" Body Lift-Add A Leaf in rear -Trailmaster SSV Shocks-Duel Steering Stabilizer Kit -AirAid Cold air intake-
4.56 Gears with Detroit Auburn Locker-Pro-Comp Traction Bars with duel shocks-Aluminum Skid Plate Kit-38.5" x 16.5" Mickey Thompson Baja Claws-Constant Dropping fuel gauge
2005 Yukon XL Jet Power Programmer, Bilstein Shocks, Bilstein rear springs, Helwig Anti-sway bars, EGR Window Visors, EGR Hood Shield, Denali Headlights, Headlight harness upgrade, GE NightHawk Bulbs, White Night Rear lighting system, Russell Braided SS brake lines, PowerStop Brake pads, PowerStop cross drilled and Slotted Rotors, http://www.gmtruckclub.com/forum/sho...5-GMC-Yukon-XL
2002 Silverado ext cab 2wd (Sold)
2003 Yukon XL (Totaled)
09-26-2013, 05:00 PM #15
2 batteries actually reduce alternator power surges from these motor winches or more commonly from high power sound generators ...they act as a capacitor to reduce current power surges that can damage the alternator .
09-30-2013, 07:36 PM #16
Better check this out http://en.wikipedia.org/wiki/Battery_isolator
I have the same truck and the second tray does look inviting to use it. The biggest problem you can have is if one of the batteries dies. In the heat of Florida, most batteries have a instant death because one cell shorts out. Up north it's usually a slow death in cold weather. Should one battery have a short it is now below 10 volts and the starter motor will never spin. With a second battery in parallel the voltage difference will drain the good battery and the current flow will reverse. Depending how the battery died it can draw a lot of current from the good battery. The cables between them will get warm and maybe hot enough to melt the insulation. An isolator sure makes sense because it can cost you dollars later on. You might stop by a Chevy/GMC dealer and see if there are any duramax trucks around and look at the battery setup. I kind of doubt both batteries are in parallel. Maybe ask a dealer mechanic who is trained on duramax engines.
10-01-2013, 09:16 AM #17
with the newer trucks the battery mounted on the fire wall is not what I recommend. this is an area of excessive heat. in a hot climate I would move this to the front of the vehicle.
I usually get 7 years out of my vehicle batteries. I keep them clean and insure they are covered on top with a rubber shield to protect from corrosives ...
The isolator diodes are a great upgrade with 2 batteries but , as long as both batteries are matched and of the same age this should not be required . you must use large guage wire than OEM with 2 batteries. I would also install a fuse between them and cover the cables with a proetctive loom material.
10-01-2013, 04:42 PM #18
One year ago I got my new truck, picked it up on Monday and by Thursday the battery went bad. The dealer did
replaced it. My luck it was one of the millions of good batteries that GM buys and mine the bad out of the box.
10-01-2013, 06:45 PM #19
back in the ancient history of my life I only got 3-4 years out of my batteries. 3 starter motors in 110,000 miles. this was a 1967 olds. that vehicle took just too much cranking from day one [NEW] on a cold start . after that vehicle , I have had no starter of battery problems with short life failures....
I do not recommend the sears die hard batteries. they internally open ... so that means suddenly you get nothing . over priced also.
my 1983 17 years 3 batteries total I purchased 2 . had to replace the starter at 15 years. 380,000 miles when sold .
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