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    ryanrj828's Avatar
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    4 batteries in trunk

    Ok, so im very familiar with how to wire an additional battery. As of now i just run the battery in my trunk in parellel to the my front battery. I plan on adding an additional 3 batteries to my trunk for a total of 4. So my question is should I run 4 runs of wire from my front battery positive to the batteries in the trunk, along with 4 runs of wire from the front battery negative to the negative posts on the trunk batteries? Please im open to all suggestions, and ive seen someone run wire from the alternator to the positive on each battery in the back. If theres any confusion please let me know and ill respond ASAP







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    Re: 4 batteries in trunk

    depends on how much amperage/watts you plan on running.
    General rule is about 300amps or 3000watts for 1/0 ofc wire.
    About 200amps or 2000watts for 1/0 cca wire.

    So if you plan on running 5000 watts. Do 2 runs of 1/0 ofc.

    And yes. If you can. For everyone positive run also do a negative run of wire.

    Electricity is a 2 way street. Your grounds are extremely important. Just as important as your power.



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    Re: 4 batteries in trunk

    thank you! it just seemed like alot of wire coming off the front battery, would running the wire off the alternator to the back be more effiecent? And itll be around 7000 rms so im thinking 3 runs of 3/0 will be suitable?




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    Re: 4 batteries in trunk

    it will be welding cable so the max amp load is only 380a, but i dont want to push the wire to the max limits




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    Re: 4 batteries in trunk

    You are on the right track! You definitely don't want your wire to get hot because as everyone knows. Heat means your losing power through efficicency.

    3 runs of 3/0 is overkill. And I like overkill
    Do it!

    Just connect the alternator to the front battery with some of that welding cable and from that battery do your 3 runs.
    So your going to do 6 runs total? 3 power and 3 ground?

    I did 3 runs of power and ground for my car and I originally ran a 5000 watt amp. Overkill is the best way to do this hobby



    Head Unit Pioneer P99RS
    3 Runs of 1/0 OFC Power and 3 Runs of 1/0 OFC Ground
    1 XS Power D3400 & 2 XS Power XP3000 with Copper Bus Bars
    380 Amp & 320 Amp Iraggi Alternators(One is a chevy case, the other ford)
    RD 7500.1 running 2 12 inch SPLaudio (AA Mayhem motors/baskets)
    Tuned to 36 hertz. About 4.5 cubic feet, 8" Aeroport (made by dbeez)
    Zed Audio Leviathan III on Morel MDT-29, RS100-4 & RS225-8 Daytons
    Alex Jones www.infowars.com Endgame, Obama Deception, Truth Rising,
    Fluoride in the water, poison in vaccines, chemical trails in the skyglobal
    elite banks run our government towards a one world global government.

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    Re: 4 batteries in trunk

    Haha i wouldnt call it over kill, Its a preventive measure! And yes 6 runs total, also do you think a 250 amp HO alt will support all this or am i looking at an additional alternator as well? this is my first big build it will be 4 15s in a wall in my car, just want to make sure im covering every angle. Id hate to have all this assembled and not be able to enjoy it because i have to order additional parts




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    Re: 4 batteries in trunk

    totally just noticed the infowars tag on the bottom of your description, listen every day work religiously




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    Re: 4 batteries in trunk

    Infowars!!!!!!!!!!!!!!
    Smart man!

    No. A 250amp alternator will run your system yes. But the voltage will probably stay around 12-12.6.

    What kind of car? Is there room for a 320 amp alternator? Is it manual or automatic?

    Well. The guys on this forum would call it overkill. 1/2 the members on here would tell you to run 2 runs of power CCA wire and just upgrade your grounds to your frame...

    But the way you are going about it is FAR SMARTER.



    Head Unit Pioneer P99RS
    3 Runs of 1/0 OFC Power and 3 Runs of 1/0 OFC Ground
    1 XS Power D3400 & 2 XS Power XP3000 with Copper Bus Bars
    380 Amp & 320 Amp Iraggi Alternators(One is a chevy case, the other ford)
    RD 7500.1 running 2 12 inch SPLaudio (AA Mayhem motors/baskets)
    Tuned to 36 hertz. About 4.5 cubic feet, 8" Aeroport (made by dbeez)
    Zed Audio Leviathan III on Morel MDT-29, RS100-4 & RS225-8 Daytons
    Alex Jones www.infowars.com Endgame, Obama Deception, Truth Rising,
    Fluoride in the water, poison in vaccines, chemical trails in the skyglobal
    elite banks run our government towards a one world global government.

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    Re: 4 batteries in trunk

    Info wars is the only reason I look forward to heading to work!

    My car is a 2006 ford fusion 2.3 I4 automatic, the biggest alternator they make for it is a 270a. I think I'm kinda stuck with the 250a. I'm just running overkill for the fact of if I upgrade subs one day, I'd rather not waste my money on cheap wire when I know I'll have to upgrade it eventually.




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    Re: 4 batteries in trunk

    Quote Originally Posted by ryanrj828 View Post
    Info wars is the only reason I look forward to heading to work!

    My car is a 2006 ford fusion 2.3 I4 automatic, the biggest alternator they make for it is a 270a. I think I'm kinda stuck with the 250a. I'm just running overkill for the fact of if I upgrade subs one day, I'd rather not waste my money on cheap wire when I know I'll have to upgrade it eventually.
    I run 3k rms off a 140a alt, 1 battery under the hood, 2 in the trunk and my system only drops to 13v on heavy hitting low notes... no dimming of lights. I have the big 3 done with 2/0 wire. I have 2 runs of power and ground. I have all of this into 2 12's and they sound good.

    My other ride, I have 5k total (mono and mids/highs) running off a 320a alt, 1 bat under hood and 1 in trunk... and it doesn't drop much either. This runs my gcons and polk comps... it sounds nice as well.


    Just for a reference point...




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    Re: 4 batteries in trunk

    Quote Originally Posted by ryanrj828 View Post
    Info wars is the only reason I look forward to heading to work!

    My car is a 2006 ford fusion 2.3 I4 automatic, the biggest alternator they make for it is a 270a. I think I'm kinda stuck with the 250a. I'm just running overkill for the fact of if I upgrade subs one day, I'd rather not waste my money on cheap wire when I know I'll have to upgrade it eventually.
    LOL that is awesome.

    Ok. So. Throw in that 250A alternator. You will just have to rely on batteries for the reserve to run your system. But you can do it.
    Bumpin Buck (SPL competitor) runs 1 320A alternator and 5 batteries for his atomic 7k.



    Head Unit Pioneer P99RS
    3 Runs of 1/0 OFC Power and 3 Runs of 1/0 OFC Ground
    1 XS Power D3400 & 2 XS Power XP3000 with Copper Bus Bars
    380 Amp & 320 Amp Iraggi Alternators(One is a chevy case, the other ford)
    RD 7500.1 running 2 12 inch SPLaudio (AA Mayhem motors/baskets)
    Tuned to 36 hertz. About 4.5 cubic feet, 8" Aeroport (made by dbeez)
    Zed Audio Leviathan III on Morel MDT-29, RS100-4 & RS225-8 Daytons
    Alex Jones www.infowars.com Endgame, Obama Deception, Truth Rising,
    Fluoride in the water, poison in vaccines, chemical trails in the skyglobal
    elite banks run our government towards a one world global government.

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    mlstrass's Avatar
    mlstrass is offline Shaggy DOA



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    Re: 4 batteries in trunk

    Why would you need multiple runs when your batt bank is in the back????

    You need to carry alt and front batt current, so 2 runs is all you need. I prefer to ground in back.




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