My first question is: Is your site on or off grid?
If on grid I might suggest looking at grid interactive wind genny systems with VAC outputs. But if there is a desire to have battery/inverter back up power, then recharge the batteries from the grid or, if the genny's happen to be producing power but the grid is down, the wind genny's using 120 VAC or 240 VAC input battery chargers.
If off grid then I might suggest still going with VAC wind genny's with step down transformer/rectifier, regulated charging systems. A system such as this might also require a "dump" or "diversion" load. These would be things to discus with any prospective wind genny manufacturer seller and or installer.
Another question I would have and, just out of curiosty really, is: Why multiple wind genny's and not just 1 - big one?
Really the best advice I feel that I could give you would be to chose a perspective wind genny manufacturer such as Bergy, just for example, and call them on the phone, ask for a tech. rep., tell him or her your concerns and go from there, they might be willing and able to help you or the may just refer you to someone else, ether way, knowing what products each manufacturer has available is a good place to start.
http://www.awea.org/smallwind/Good luck!