US Irradiance Maps

Here are some good US irradiance maps to show how the amount of irradiance varies throughout the US. Please click on these images for a larger version.

The following map has a nice scale that shows the annual irradiance difference.

National_PV_Map_Letter2

The following map is the same as the one above. Please note the data is approximately the same. The difference is appearance is from the scale selected.

us_pv_annual_may2004

 

us_pv_january_may2004

 

us_pv_february_may2004

 

us_pv_march_may2004

 

us_pv_april_may2004

 

us_pv_may_may2004

 

us_pv_june_may2004

 

us_pv_july_may2004

 

us_pv_august_may2004

 

us_pv_september_may2004

 

us_pv_october_may2004

 

us_pv_november_may2004

 

us_pv_december_may2004