Looking at the specs for some commercial 48V turbines, it seems that there is some power to be harvested between 40V and 56V that might otherwise go to waste because the battery is at a higher voltage. Would it be possible to connect a turbine directly to the battery through a blocking diode, and then connect a suitably low voltage GTI with programmable power curve to the other side of the blocking diode?
To my novice eye, it seems that this would allow the GTI to draw power from the lower voltages and then also charge the battery once the turbine reaches higher than batt voltages. I'm thinking of using a 1.5kW max output 48V turbine with a 500W windmaster GTI. Dumping surplus will then be done through a typical battery PWM controller and is not included in the sketch.