After 3 years of free wheeling I'd test it out before I put large sums of money into it.
The 14.4v is fine - plug the output into a suitable MPPT controller - I say suitable because you don't mention the model so I don't know the output amps.
The one they advertise here on sailnet:
WIND GENERATOR - LVM - AERO6GEN - LVM612 - Sailnet Classifieds
says 30amp so figure you need that to be sure.
The MPPT will take the 14.4 - and depending on battery type you've set up for and charge state - convert voltage to amps / amps to volts to make it charge the system most effectively and efficiently (again, based on state of charge as read by voltage level of the battery.
Doing it that way adds another piece of gear but makes it safer and more efficient. It also adds monitoring capability.
As to whether or not air gens are useful - that's another thread, but who anchors in high wind areas?