Most brake noise comes from vibration, and as is for heavy metalics. Still it should not sound like their dragging. Check your E-Brake, see if its commonly over-looked. If by chance you remove the calipers, make sure the pins are greased. Thats another common problem. Gases can build up between the pad and the disc aswell, if you just cnt take the noise try purchasing a pad with a split down the middle.

Having a system can be exicting, etc. I know what your going through. But dont let it go too far because you can and will ruin your alt/battery. Try installing a capacitor or two. That will solve your problem.