How much you are willing to spend on a system also will affect size selection. If you have not yet decided what fuel source to displace, the previous steps should give you a clue. Try to match fuel consumption to wind availability. Seasonal winds are strongest in winter and early spring, and daily winds usually peak during the afternoon. If you are considering storing the electricity, as with batteries, then the daily variation in winds is less important.
Most people choose electricity as the wind turbine's product.
Interconnection of the wind system with the utility grid eliminates the need for separate storage and provides the convenience of unlimited back-up power from an existing energy source. If you are only looking for alternative energy sources for hot water or space heating, there are other alternatives that should be considered for their practicality and cost-effectiveness. Active and passive solar systems, and wood stoves or furnaces might be better suited for such heating needs. Once you have decided how wind energy will work for you, you should examine the wind turbine products and accessories available on the market. If you haven't already, this is the time to contact one or more dealers to discuss your particular interests and get preliminary cost estimates.