Can you tell me how long his alternator lasted with the voltage regulator heating up from the stress of being forced to output higher current instead of normal voltage? alt can and do take it for a while, but you can bet your a** it will/did fail. sure you can run strictly off of the batteries but the alt will be tortured the entire time and will fail.
Think about this... a 3000w amp would pull around 222 amps, alone at 13.5v (3000 divided by 13.5v) a 250amp alt would need to provide 222 amps to the amplifier plus an additional 40 amps for the cars ignition system etc... right there you just exceeded the 250 amps that the alt puts out (mind you the alt would have to be spinning at 4000+ RPM to get the full 250 amps, it outputs far less at idle)
so the alt was bouncing between higher voltage and higher current demand, hence the destruction of its voltage regulator. Its the same concept of an amp clipping. surely you know what that is.
