Thank you Adriaan Kragten for your comments. I put a meter to my Harley and it puts out 14.4V with the motor running. My plugin AC battery chargers also put out 14.5 volts. My Harley battery last about 2 years, so the high voltage may be a problem. Of course, there are also loads on the battery while the motor is running (lights, ignition coil, etc). The short is based on SCR's, so it shorts to ground, only on the positive half wave, of the AC side, when the voltage limit is tripped. This short is on the AC side to ground and not on the battery to ground.
For the wind gen, I am using AGM batteries and the battery manufacturer recommended a charging voltage of 13.8v for standby batteries. I am using them on a sailboat, so the batteries will be standby until I leave the dock, so 13.8v would be better. I tested today adding a diode between the Rectifier/Regulator and the battery; and the torque hit at 13.9v. That braking does slow down the turbine to keep it from over spinning. I mounted the turbine on my truck and ran it up to 50 MPH, and the wind wasn't enough to overcome the braking effect of the positive half wave AC to ground.
A Harley has a 96 cubic inch engine to overcome the shorting to ground and produce max amps. The AC stators don't burn out on motorcycles using this method, so I don't think there will be any long term damage to the Wind Gen. But, it's my Wind Gen to play with.