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Solar Maps

Solar maps provide monthly average daily total solar resource information on grid cells. The insolation values represent the resource available to a flat plate collector, such as a photovoltaic panel, oriented due south at an angle from horizontal to equal to the latitude of the collector location. This is typical practice for PV system installation, although other orientations are also used.

Several map variations are accessible below. For information on how these maps were developed, access the Solar Maps Development - How the Maps Were Made page.

Thumbnail image of the national solar photovoltaics (PV) resource potential in the United States map.
Thumbnail image of the concentrating solar power (CSP) resource potential in the United States map.

Types of Maps

U.S. Solar Resource Maps

These maps show national solar photovoltaics (PV) resource potential and concentrating solar power (CSP) resource potential for the United States. They are available in JPEG format.

Photovoltaics

  • Data - 1998 to 2009 Low Resolution (letter size) (JPG 1,234 KB)
  • Data - 1998 to 2005 Low Resolution (letter size) (JPG 111 KB)
  • Data - 1998 to 2005 High Resolution (poster size) (JPG 5.63 MB)

Concentrating Solar Power

  • Data - 1998 to 2009 Low Resolution (letter size) (JPG 1,261 KB)
  • Data - 1998 to 2005 Low Resolution (letter size) (JPG 113 KB)
  • Data - 1998 to 2005 High Resolution (poster size) (JPG 5.63 MB)

PV Solar Radiation (10 km)—Static Maps (1998 to 2005 data)

These maps provide monthly average and annual average daily total photovoltaic (PV) solar resource, averaged over surface cells of 0.1 degrees in both latitude and longitude, or about 10 km in size. This data was developed using the State University of New York/Albany satellite radiation model. See How the Maps Were Made for more information.

Concentrating Solar Power Radiation (10 km)—Static Maps (1998 to 2005 data)

These maps provide monthly average and annual average daily total concentrating solar power (CSP) resource, averaged over surface cells of 0.1 degrees in both latitude and longitude, or about 10 km in size. This data was developed using the State University of New York/Albany satellite radiation model. See How the Maps Were Made for more information.

PV Solar Radiation (40km)—Static Maps (1985 to 1991 data)

These maps provide monthly average daily total solar resource information on grid cells of approximately 40 km by 40 km in size. The insolation values represent the resource available to a flat plate collector, such as a photovoltaic panel, oriented due south at an angle from horizontal to equal to the latitude of the collector location. Learn more about Solar Resources for Flat Plate Collectors.

Concentrating Solar Power Radiation (40 km)—Static Maps (1985 to 1991 data)

These maps provide monthly average daily total solar resource information on grid cells of approximately 40 km by 40 km in size. The insolation values represent the resource available to concentrating systems that track the sun throughout the day.


For more information on CSP resources, access the resource maps page on the Concentrating Solar Power website.

For more PV resource maps, access the MapSearch site.

For Geographic Information System (GIS) solar resource data, access the Data Resources page.

For interactive maps and tools for viewing maps and data, access the Data Visualization and Tools page.

If you have difficulty accessing these maps because of a disability, please contact the Webmaster.