Running DC over long distance
Voltage drop across a resistance is proportional to current flowing though it, so you will have less loss to resistance for a higher voltage/lower current than for a lower voltage/higher current. This is why long distance power lines use the highest voltages possible. 

In your case, sending 120 volts over your long run would be more efficient than sending 12 volts. Keep in mind that this assumes you have wiring that is rated to handle the new higher voltage between the turbine and the point of use for the 120 vac. 

Interestingly, my solar system strings lots of 40 volt panels together in series to send up to 600 volts back to the inverter because otherwise I'd need massive cables to carry the same amount of power. The latest trend is to put micro inverters on every panel to convert the low voltage to high voltage as close to the generation point as possible to minimize wire size.