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RickyFriery97

Second Battery In My Tahoe

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Alright So i Got a 2007 tahoe and it has a second battery tray where i will be putting a D3400

im gunna be dooing a simple build in it with (4) DC level 2 8"s on a AQ2200D

It has a stock 160 amp alt

my question is do yal think i should do the big three to both? the Amps power/ground will come straight off the D3400

The vehicle has RVC

none of the system will be ran off the stock batt so i dont think i need to do the big three too it

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Okay, on your main battery, the one on the passenger side im guessing, do your big 3 as normal. Ground to the frame, engine, and positive to the alt. On your second battery, you will do the two grounds as normal. But don't put one to the alternator...you could get voltage problems and end up frying the alt. I learned this the hard way on my tahoe. Just run your positive on your second batt to the positive on your first batt.

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So you had problems by running multiple runs to multiple batteries straight from the alt? I have five batteries and 4 runs of 1/0. ONe run to my main batt, one run to my two HC800s and one run per HC2400....never had any issues. I am sorry for jacking your thread OP but just wondering what problems baker got.

I would have told the OP its fine. They are all common points anyway.

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Okay, on your main battery, the one on the passenger side im guessing, do your big 3 as normal. Ground to the frame, engine, and positive to the alt. On your second battery, you will do the two grounds as normal. But don't put one to the alternator...you could get voltage problems and end up frying the alt. I learned this the hard way on my tahoe. Just run your positive on your second batt to the positive on your first batt.

yes the stock battery is up by the firewall and is gunna be a pain in the ass to work with

why do you say it could fry the alt? puttin to much stress on a stock alt?

on my burban i have two runs of 1/0 coming of the back of my alt one two each of my D3400 under the hood with no problems (but its a 300 amp alt.. )

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So you had problems by running multiple runs to multiple batteries straight from the alt? I have five batteries and 4 runs of 1/0. ONe run to my main batt, one run to my two HC800s and one run per HC2400....never had any issues. I am sorry for jacking your thread OP but just wondering what problems baker got.

I would have told the OP its fine. They are all common points anyway.

i was asking him this two because i have two runs of the back of my alt to two seperat batts with no problems so im wondering too

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im going to have dual batts under the hood and dual alts. with the big 3 done on both............ IJS.

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im going to have dual batts under the hood and dual alts. with the big 3 done on both............ IJS.

i will have the same on my 1997 burb witch is the same as your truck almost

dual 300 amp iraggi alts and two D3400 in my suburban

this is in my 2007 tahoe though and nothing except the stock electronics will be ran off the stock batt

the D3400 will run a single AQ2200D and that will be the only amp in the truck (for now)

so i think doing the big three on only the D3400 will be fine as thats the only batt running the amp i just want some opinions

the stock batt is up by they fire wall and will be a major PITA to do the big three on

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Okay, on your main battery, the one on the passenger side im guessing, do your big 3 as normal. Ground to the frame, engine, and positive to the alt. On your second battery, you will do the two grounds as normal. But don't put one to the alternator...you could get voltage problems and end up frying the alt. I learned this the hard way on my tahoe. Just run your positive on your second batt to the positive on your first batt.

yes the stock battery is up by the firewall and is gunna be a pain in the ass to work with

why do you say it could fry the alt? puttin to much stress on a stock alt?

on my burban i have two runs of 1/0 coming of the back of my alt one two each of my D3400 under the hood with no problems (but its a 300 amp alt.. )

Well, they are common points, true. But here is my reasoning. When you have a run from alt. to batt 1 to batt 2, the alternator charges them in sequence. For example, the alt will charge your main battery first...then when it is charged, it will move on to your bank battery and charge it. This means that it may take longer to fully charge both batteries, but it will be a safe and consistent draw from your "STOCK" alternator. Now, if you have a run from your alt directly to each battery, then your alternator is having to work double to keep a charge on both of those batteries at the same time. It would take half the time to charge the two batteries, but like i said, your alt is trying to charge them both at one time, therefore it is working hard. If you take into equation both batts are drained one morning, you get in the hoe, and start bumping, then you got even more strain on that "STOCK" alternator...making more chances for magic smoke. This is just my reasoning behind all this...if someone sees flaws in it, please correct me...don't eat me alive.

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Okay, on your main battery, the one on the passenger side im guessing, do your big 3 as normal. Ground to the frame, engine, and positive to the alt. On your second battery, you will do the two grounds as normal. But don't put one to the alternator...you could get voltage problems and end up frying the alt. I learned this the hard way on my tahoe. Just run your positive on your second batt to the positive on your first batt.

yes the stock battery is up by the firewall and is gunna be a pain in the ass to work with

why do you say it could fry the alt? puttin to much stress on a stock alt?

on my burban i have two runs of 1/0 coming of the back of my alt one two each of my D3400 under the hood with no problems (but its a 300 amp alt.. )

Well, they are common points, true. But here is my reasoning. When you have a run from alt. to batt 1 to batt 2, the alternator charges them in sequence. For example, the alt will charge your main battery first...then when it is charged, it will move on to your bank battery and charge it. This means that it may take longer to fully charge both batteries, but it will be a safe and consistent draw from your "STOCK" alternator. Now, if you have a run from your alt directly to each battery, then your alternator is having to work double to keep a charge on both of those batteries at the same time. It would take half the time to charge the two batteries, but like i said, your alt is trying to charge them both at one time, therefore it is working hard. If you take into equation both batts are drained one morning, you get in the hoe, and start bumping, then you got even more strain on that "STOCK" alternator...making more chances for magic smoke. This is just my reasoning behind all this...if someone sees flaws in it, please correct me...don't eat me alive.

you make a very good point and i understand

its harder to charge both batts when you run a charge line to each seperate batt on a STOCK alt

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But it's a larger stock alt it's 160 amp so I'm thinking do the big three on both and connect positive to positive and maybe the same with negative

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38899224201_large.jpg

That is on my sierra, should be same as your tahoe, did one ground to the firewall and then parallel runs of power and ground to the other battery in the stock location. That is all you need.

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38899224201_large.jpg

That is on my sierra, should be same as your tahoe, did one ground to the firewall and then parallel runs of power and ground to the other battery in the stock location. That is all you need.

yup except that is where my stock battery is

im gunna do the big three to both batteries

all the electrical under the hood is stock right now

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