Wind is a difficult resource to survey. Local experience is sometimes required, or the installation of a small generator at the proposed site, which is then monitored over a period of a year, can indicate whether the site is suited for a larger generator. Checking for vegetation flagging and of locally recorded wind data may also be required to establish suitability of the site. Hydro is the easiest renewable energy source to survey. All that is required are accurate head and flow measurements and some historical data on the seasonal output of the water source.
Many dealers combine the load analysis and site survey into one trip to minimise costs.
Designing a renewable energy system means using the system s energy requirements and the site s RE potential to power a specific list of equipment. This RE equipment supplies the needed electricity within the limitations of the load analysis and site survey. Put into words it sounds easy, but really there is just as much art as science involved in system design. They know which equipment works well with other equipment. They know your local RE environment.