Iowa Solar Maps

In 1993, the Iowa Energy Center funded a project with the Tom Wind of the Iowa Wind Energy Institute (IWEI) to assess Iowa’s potential for solar energy use.

IWEI worked solar researcher Richard Perez to create a solar mapping of Iowa. These maps are based on hourly averaged solar insolation data from li-cor pyranometers mounted at five IWEI wind-monitoring sites. The five measurement sites were well distributed, one each in the northwest, southwest, southeast, northeast and center of the state.

The solar calculator on this site currently allows calculation for any location in Iowa of photovoltaics and solar thermal. The user can select the orientation and type of tracking device used for the solar panel. The user will be able to enter an efficiency coefficient to accommodate different photovoltaic materials.

Yearly Irradiance

Seasonal Irrandiance