I need some help Im goin to insttall 2 mor batteries in my van , this wil be the supply for 3 amp?

I have 3500 watts total in amps what i do not know is how to hook those 3 batteries should i need a pum to pom up the power and also a resistor to bring the power to 12 v for the rest of the components like 4 capacitors plaese i holpe you help meI need some help Im goin to insttall 2 mor batteries in my van , this wil be the supply for 3 amp?
First, you can't just add extra batteries without upgrading the alternator, you could easily burn it up. Second, capacitors are NOT work the trouble and price for what they can do. They're worth looks, that's about it. Spend the money on a better alt or batts. Half way there :D





If you run the system off the batteries separately from the car power system, it is possible, but you'll have to charge the batteries independent of the car's power. That would be kinda silly.





And I can't imagine why you'd want to add a resistor to the power loop. If you're using car/motorcycle/boat batteries they'll be close enough to 12v that it won't matter. You connect the batteries in parallel.I need some help Im goin to insttall 2 mor batteries in my van , this wil be the supply for 3 amp?
Ahh a system to be proud of... Just remember to connect all of the batteries to a larger than normal output Alternator and ground everything EXtremEly well! (welding or sanding of the paint will help)... running a single amp off a single battery powered by an ALTernator will be suffice..





a lightning cap will help from lights going dim... 150+ fared capacitor will store power and release it properly to the amp as to run a constant 14 volt for full AMP power! 14.4 will NEVER be achieved; however the shorter the power and ground cords the more power delivered and thicker as well!





OTT gauge or 0 gauge should definitely be used.





but ONE battery besides the car battery should be suffice... 3 will not be needed except for Hydraulics!


TMWL
If your total system power is 1200 watts RMS or more, you will need to:





1. Upgrade the ';Big 3'; - that is to replace (or add to) the power wire between the battery and alternator, the ground from the battery to the chassis and the ground strap from the engine/tranny to the chassis.





2. Upgrade to a yellow top battery





3. Upgrade the alternator to a high output alternator








Failure to do this will result in the early death of the alternator as it will eventually fail.





Here is a guide that will calculate what size alternator and power wires you need http://www.box.net/shared/uchv4dbk88





You will need Microsoft Excel. If you don't have Excel, use this link http://www.box.net/shared/nkkw1dhk4g





A second battery is never a good idea as it's an added strain on the alternator to charge two batteries AND supply power for the car. The ONLY time a second battery is useful is if the audio system is to be used with the car off.





A capacitor is only good so far as the audio system isn't trying to pull too much from the electrical system. A cap doesn't provide more power, it's designed to 'stiffen' the voltage to the amp, nothing else. If the current isn't there, a cap won't help.





The alternator must have at least 20% more amperage power than the entire vehicle and sound system combined for a cap to be of benefit which is ironically the same requirements for an amp to be efficient.





See my site for more info http://spkrbox1.spaces.live.com
Your 3500 watts is the output of your amps. What is the power input per amp? You can connect the batteries positive to positive, negative to negative. This will increase the storage capacity but if your alternator isn't charging more than you are using, the batteries will discharge no matter how many you add.
you would need a high output alternator to keep those batteries charged. there's a few popular places to get those. With that kind of wattage you want to upgrade your wiring to maybe 0gauge power cable. also a battery isolator would help. You don't need 4 capacitors, all you would need is a single cap that's maybe 5 farads. You don't need any kind of resistor, the voltage is going to be correct.


what is pum? what is pom?
I have no clue what you're asking. Nothing that you wrote makes any sense.





You cant have 3500 watts total in amps. They are two completely different things. Watts are not Amps.





What is PUM and POM?





bring it to 12v? Arent the batteries for vans 12v already?





What do capacitors have anything to do with it