I've just put up my Superwind. Sitting here in estimated 15-20+ knots and seeing spikes of 15A on the ammeter.
I did the endless internet
trawl researching the subject and my shortlist was the D400, Silentwind, and Superwind. 1st criterion was low noise
; we had the World's Noisiest Wind Generator
on our last boat and while it sounds pretty musical when it's feeding your batteries, they're a pretty antisocial beast.
The D400 was eliminated due to weight. The Silentwind looked good but what sold me on the Superwind was the centrifugal/mechanical blade-feathering feature. According to their blurb, at higher wind
speeds the blades will feather and keep tip velocity within certain parameters thereby keeping noise
down and allowing the unit to keep charging
rather than going into overspeed-preservation mode. This sounded plausible to me so we went for it.
The unit is well made. Good instructions. Well balanced and good vibration damping; when I put my hand on the pole while it's running I don't feel any vibration.
Happy with the choice. Noise factor quite acceptable; nothing like the high pitch
of the World's Noisiest.