Hello all, just thought that i'd contribute a few words as I used to live on my own boat for a few years and tried to generate my own power from the sun and wind and found it very frustrating (specially when running a 5 kw central heating system, lights etc...all off a 12v system) A good source of information about wind turbines are to be found in marine websites, e.g. look up: Rutland, AirX etc..and pay particular interest to wattage, ampage, battery management systems and the batteries themselves. There is a lot to learn before comitting to installing a system and spending money. As an alternative, check this out, it's the ultimate !
http://www.whispergen.com/ (If I had the money i'd go for one of these systems as experience has taught me that wind and solar don't work very well, not as a primary power supply at any rate).
Now- hydro electricity ! That's a different matter, live on the banks of a river or stream ? If so, lucky you !