Solar Panel Education background from Heliotronics

Here are some pd files that can be used in your classes. The Heliotronics site, which does have 180 participating installations (mostly schools I believe) does alot of outreach activities and you may want to investigate getting access to their monitored places. It may be that from a school site or .edu site, you would have access without requestiong it, otherwise, from my home I seem to have only the 3 featured sties on the main page:
http://www.sunviewer.net/
Here is the educator webpage.
http://www.heliotronics.com/educators/educ_main.html

Plotting Heliotronics data