alt/battery determination

[dmz2711 0]

Is there a way, such as a calculation, or some type of rule of thumb to determine what alternator, as well as how many batteries it will take to run a certain system? Are there any guidelines to determine these values? For example, lets say i have a 5000 watt system, can i plug that into an equation, or some sort of outline to determine what size alternator i would need, and how many batteries i would need? or if i wanted an 8000watt system, same thing.... Is there a rule, like for every 1000watts you need a certain amount of amps within a battery? I am not trying to figure anything out for myself, I am just askin for basic knowledge to see if there is an easy way to determine this (mostly about the extra batteries part), thanks in advance!

[weasle421 1]

http://www.kinetikaudio.com/calc.asp

at least this will do your batteries and others should be able to help more...

[mikechec9 0]

Divide the total number of watts going to your subs by the number of volts (12-13).

That will give you an approximation for the number of amps required from your alternator.

[cjack 0]

The people from rockford fosgate said for every 1,000 watts your alternator needs to pump out at least 70a. If you find out some info on a good alternator brand that will do atleast 250a, let me know. I keep on asking in a couple of different forum and get no help

[Tommythecat 0]

Alternators:

HO alts

Ohio Generator

Iraggi Alts

Excessive Amperage

Look 'em up, search the forums.