Hello powermiester,
Just noticed you posted another question.
Would have noticed earlier if you had replied to one of my posts.
In theory Yes to your question. But.
How are your going to convert the 48v back to 12v?
500w converter to do this is not cheap. Check eBay.
If the output is AC, this may be easier, but:
the wind gen output is variable voltage AC, the transformers do not work well bellow their rated frequency.
To my thinking, I would go for a 120vAC generator, can use a standard transformer to do the voltage conversion, help reduce line losses further and help make up for the transformers own losses.
PM generators output voltage is directly proportional to RPM.
With a cut in speed of 6mph, at 12v. At 12mph the output is now 24. and up.
This is the root cause of matching the gen to the blades.
You have many choices to solve this, read up and make your best guess! And go for it.
Have fun,
Scott.