i was talking about paralleling the outputs to the batteries (thats how i have my wind turbines setup). Ive seen 2 (brushless) alternators of equal value hooked up in 3phase series -and par. series doubles the voltage, and parallel will double your amperage -just like batteries. I guess you can do it if all the alts are equal and the rectifier can handle it. Ive also seen brushless alts that regulate themselves to the load they are connected to (uhhhhuhuhhuhuuhhhu i said load). I have several GM10si's that will do 120vDC spun from a cordless drill, but if you hooked em up to a car/truck on 12v load and revved em to 1000rpm, you would destroy them in less than a minute. I guess ill ahve to try that out in the cave one night when i get bored. I have a bunch of cores i can experiment on.