Mike,

My Ford F350 truck comes factory stock with two 135A alternators. I don't think most folk need 270A of power but it does help satisfy the requirement of 130A or so while the engine is idling. That is the reason I brought it up. Since I have a 2500 Watt inverter to power up, at 12V this draws 200A. Without the alternators being able to keep up with this demand the batteries, even duals, would be depleted soon. This is not a "hot rod" application though, but a work truck.

Cheers, Mark