I'd be interested in the answer to this too, there's a load of information and vendors for thermal collectors, but very little for photovoltaics. I'm more interested in the latter, particuarly on where the cutoff point is for efficiency with AC/DC conversions and storage.
I'd say you're wasting your time with wind turbines. Small turbines might be more efficient, but large turbines are very expensive and have a long break-even cycle that stretches nearly to the end of their lifespan.
adam
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