We are currently preparing our Dufour Grand Large 380 (2014) for blue water sailing, starting with several months in the Med and a Transatlantic crossing. For her energy management (approx. 400 Ah batteries), we are considering a wind generator, in addition to a second alternator; so far, solar panels are also an option. We are excluding a diesel generator due to several reasons.
I would like to learn from others what your EXPERIENCES and SUGGESTIONS are with regards to WIND GENERATORS?

• power generation in relation to wind speed in "real cruising conditions"
• noise below deck - if installed on aft deck
• installation - physical considerations (e.g. space), materials, cost, tips & tricks etc. 
• maintenance
• comparison of brands (e.g. Superwind 350, Air-X from Primus Wind Power, D400 wind generator)
• benefits vs. risks
• ...

Looking forward to hearing from you!
Thanks, Vanessa