Quote Originally Posted by TurboTrav View Post
not to jack but the lowest i got yesterday was a 10.9V
That could also be due poor connections or small guaged wire or LENGTH of said wire. Refer to the12volt.com to help with wire runs and determining power requirements.

I have a 4awg run in an 04 GP with ~1800(a/b power supply) watts on tap. In cold weather(30 or below no humidity) I go down the highway with 14.9 on the DIC and ~14.5 measured in the trunk.

Again, there's no way in hell I use that many watts. But if I run my subs incorrectly I can definitely strain the alt with dimmed lights. However, my voltage is still fine.