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  #1  
Old 12-05-2011, 11:20 PM
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Default To add in extra battery or not?

I am running a small 1000 watt rms system I do plan to up grade later & plan on buying a 4 channel for my interiors. I would like to leave in my stock alternator but would replace if that is would help. I want to run a good clean system that is reliable & I want to get the most out of my amps, I just dont want to run out of power causing the amp to over heat & put out distortion. I want my all my electical demands met. I am planning on putting an Optima Yellow d35 under the hood. What do you all think I dont want to burn my alternator up by constantly charging 2 batteries & if I do add in a second battery I am not sure of the correct way to wire it in. I have heard you run the positive to the positive on the battery under the hood & ground it where closest to where it is located. I would like your opinions on whats practical for a daily driver & reliable what would be.
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Old 12-06-2011, 11:48 AM
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yea you have the wiring right. if the bats are right next to eachother then you run them in paralell to boost amps and keep the same volts. you run pos. to pos. neg to neg. or you can just run the negs to the chassis or what ev. but if its up under the hood, then i recomend that you do a big 3 upgrade. it will boost your voltage, dont run the bats in paralell (pos to neg, then take pos and neg from each bat to power your amp.) this will boost volts wich will blow your amp. you can always run as many batts as you want in parallel, its good because you amp is drawing more amps than volts, look of a few diagrams on google. im sure you will find somthing helpfull if im no use.
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Old 12-06-2011, 12:02 PM
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Really, I don't think you should get one without the other. I you're gonna upgrade or add batteries you should also upgrade or add an Alt.
Adding batteries without upgrading you Alt could burn your Alt out because of the added stress.
Before buying that Optima batt, maybe looking into XS Power, they have some real good batteries.

For under 2k watts you might be able to get a HO Alt + the big 3 and you should be fine though.
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Old 12-06-2011, 12:06 PM
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Depends on your stock alt you might be able to get away with a big 3 and be done just remember never demo engine off and watch your voltage carefully
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Old 12-06-2011, 12:15 PM
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sorry to intrude, but im jw if adding a second battery (or more in some cases) helps hold 14 volts? (with the car on of course) im jw cuz we all know they dnt technically add voltage, just amps, so im jw what the amo would be taking from where if that makes sense?

thanks,
Alex
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Old 12-06-2011, 12:37 PM
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Quote:
Originally Posted by Ujerk123 View Post
sorry to intrude, but im jw if adding a second battery (or more in some cases) helps hold 14 volts? (with the car on of course) im jw cuz we all know they dnt technically add voltage, just amps, so im jw what the amo would be taking from where if that makes sense?

thanks,
Alex
most bats are at 14v charged, so yes to answer your question, adding more bats will help hold your volts to a stable 14v. but you have to have a generator to charge all that power. so you need a high output alt, or a few high output alts. cuz your stock alt will stress trying to charge all the bats and will eventually fail.
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Old 12-06-2011, 12:41 PM
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Quote:
Originally Posted by Jthomas View Post
most bats are at 14v charged, so yes to answer your question, adding more bats will help hold your volts to a stable 14v. but you have to have a generator to charge all that power. so you need a high output alt, or a few high output alts. cuz your stock alt will stress trying to charge all the bats and will eventually fail.
i has a 280 amp alt already and an xs power D3400 under the hood, i was jw if id stay at a higher voltage longer with a second battery in the event i decide to upgrade thanks
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Old 12-06-2011, 12:42 PM
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the more battery bank or reserve u have the better..
1000 rms system total.. do the BIG 3 upgrade.. good battery underhood and a small 20ah or so car audio battery in the back and ull be set
and a voltage meter to monitor amps votaGE at all times
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Old 12-06-2011, 12:47 PM
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guys, we're talking 1000w rms here. 1 large batt up front will do with big 3. or maybe 2 smaller batts. HO alt is kind of really not necessary.

It would be helpful to know what kind/year of car you have. That way we can recommend a good battery fit. Also gives us alternator info, how many amps it puts out at idle and such. Also tells us if the alternator has a slip clutch design.

Batt wiring for 2 batts is pos to pos, neg to neg. grounding the batt to the chassis works, but is most efficient to run the neg of the second batt to the neg of the first.
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Old 12-06-2011, 12:53 PM
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Quote:
Originally Posted by slamnride View Post
guys, we're talking 1000w rms here. 1 large batt up front will do with big 3. or maybe 2 smaller batts. HO alt is kind of really not necessary.

It would be helpful to know what kind/year of car you have. That way we can recommend a good battery fit. Also gives us alternator info, how many amps it puts out at idle and such. Also tells us if the alternator has a slip clutch design.

Batt wiring for 2 batts is pos to pos, neg to neg. grounding the batt to the chassis works, but is most efficient to run the neg of the second batt to the neg of the first.
He has 1000rms now, he said he might upgrade and still needed to add his 4ch amp.
I think and HO alt + big 3 is better for him now and in the long run.
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