Contact an experienced renewable energy provider who can provide generation capacity for solar, wind or hydro systems installed onsite in a pre-feasibility study and identify potential obstacles. It is easiest to locate the providers through the trade organizations or manufacturers. For example, a wind turbine manufacturer should be able to provide names of qualified vendors who can visit the site and provide a written feasibility report based on the site specific wind speed, hourly generation capacity, and major obstacles like neighboring buildings. If a systems provider is not available, get names of electrical engineering firms who can do the analysis. Look up NREL and trade organizations to obtain the directory listed in Resources.