Buy a Marlec Rutland
913 wind charger
at your own risk. My own experience of this product has been a nightmare.
has a terrible inherent problem of the permanent magnets being embedded in the ABS plastic hubs which over time (a very short time in my case) will warp and lift
from the hubs rendering the unit useless. Continued running will mean the stator will rub on them rendering it useless.
are their agents, and after considerable pressing (up to 20 tonne) the hubs appeared to have the magnets back in flush with the surrounding plastic hubs. They said they would see if the unit could be re-assembled. A few days later I got a bill for $50 and the hubs were still no good.
Oh . . . but I could always buy a new set for $660(NZ), or buy another one at over $1600! They have the parts
sent to them and I still have my $50.
Needless to say, I now have a new turbine that doesn't use that kind of design and is running happily at the stern of our little ship producing up to 300 watts. Oh, unlike the Rutland which is British-built, the new one is Chinese and works great!