wiring helpppppppp

[xgallegos4 10+ year member]

what do i need to do when i add another battery in the trunk for my bass amp?

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[.::DuD3::. 10+ year member]

Why do you want to add an extra battery? Adding an extra battery will do nothing for your car's electrical seeing as how the alternator runs the car, the battery just starts the car. Adding an extra battery will only help increase ample current and stabilze voltage when the car is not running. So unless you want to spend a lot of money to listen to your system with the car turned off, I wouldn't do it.

 

[streetbeater07 10+ year member]

you parallel the two batteries together. from your second battery to your amp. Battery or cap is always useful.

 

[.::DuD3::. 10+ year member]

Explain please. And if you can prove it matematically, because I can prove my arguement mathematically.

 

[xgallegos4 10+ year member]

i want to add another battery because i dont want to buy another alt. or am i better of buyin an alt instead of a extra batt

so this is what i basicly have

a 500 watt for my highs and mids and i plan on getting a 3k watt for my subs so i think i need another battery because i heard caps are useless

 

[QuikSilverRS91 10+ year member]

i want to add another battery because i dont want to buy another alt. or am i better of buyin an alt instead of a extra battso this is what i basicly have

a 500 watt for my highs and mids and i plan on getting a 3k watt for my subs so i think i need another battery because i heard caps are useless

If you're trying to get rid of the dimming highlights issue, caps are nearly useless. I'll have words with anyone who says they're completely useless though. Physics wins, hands down.

 

[Databyter 10+ year member]

If you do it you should run BOTH batteries to a battery isolator (about 20-40 bucks). The lead from your alternator goes to the isolator, and then it ONLY charges the battery that needs a charge.

If you don't use an isolator then make sure that your batt.s are the same type , age, and size, and share the same load (and wiring runs if in different locations), otherwise you will be overcharging one (which is bad) and reducing the current to the other(which is bad), and making your alternator work twice as hard (which is really bad).

 

[xgallegos4 10+ year member]

so should i get another batt or a ho alt? for this setup?

 

[QuikSilverRS91 10+ year member]

Explain please. And if you can prove it matematically, because I can prove my arguement mathematically.

Hmm.. I have to play Devil's Advocate.

Battery A puts out 12 VDC at 50 amps.

Battery B puts out 12 VDC at 50 amps.

Wired in parallel, Batteries A+B put out 12 VDC at 100 amps.

How is this not advantageous? A larger amount of available amperage increases performance.

 

[Databyter 10+ year member]

I'm dealing with a similar issue/question at the moment with a less powerful system, I'm going with a spare batt. (probably add it later because of my budget, this is a multi phase project).

For me the choice came down to the fact that I like to kick it for long periods with the car turned off and the music blasting.

With an isolator, as stated, only the Aux. battery to your amplifier is pushing current (and maybe a small amount to your head unit if it is wired to your starting battery).

This way you can blast to your hearts content and then start up your car with no worries hours later.

 

[QuikSilverRS91 10+ year member]

I would go with the HO alternator. I'm sure you'll get differing opinions from everyone though.

How about trying it without either and seeing how it works first?

 

[xgallegos4 10+ year member]

ok so basicly my set up max watt would be around 4k kuz in the future ima upgrade so what should i do the ho alt or run a second bat in the trunk? im going to be doing the big 3 in 0 gauge soon

 

[YoungBloodM50 10+ year member]

Do it all. Big 3, alt, batts.

Good luck running that much wattage on stock electrical.

 

[patotay 10+ year member]

Do it all. Big 3, alt, batts.

+1

 

[xgallegos4 10+ year member]

So wat would be the best choice add an isolator or wire the batterys in parallel I'm running 2batts one under the hood one in the trunk