1. Insolation is the radiation from the sun received by the Earth's surface, or the rate of such radiation per unit of surface.

2. Energy Information Administration, Renewable Resources in the U.S. Electricity Supply, DOE/EIA-0561 (Washington, DC, February 1993).

3. The amount of global (direct plus diffuse) sunlight only varies by plus or minus 25 percent within the continental United States from an average value in Kansas.

4. Information for this section, unless otherwise noted, is taken from S. Sklar and K. Steinkopf, Consumer Guide to Solar Energy (New York, NY: Bonus Books, 1991).

5. D. Escobedo, "Luz Blames Government for Bankruptcy Filings," Public Utilities Fortnightly, Vol. 129, No. 2 (January 15, 1992).

6. Unless otherwise noted, the material in this section is taken from Energy Information Administration's Solar Collector Manufacturing Activity 1993, DOE/EIA-0174(93) (Washington, DC, August 1994). See Appendix H for more information on the infrastructure of the solar-thermal and photovoltaic industries.

7. B. Buttler, "Government Solar," Solar Industry Journal, Vol. 6, No. 1 (First Quarter 1995).

8. S. Sklar, "No Time for Apologies," Solar Industry Journal, Vol. 6, No. 1 (First Quarter 1995). 9. "Enron Identified as Source for SEZ Study's PV Prediction of 5.5 cents," The Solar Letter, Vol. 4, No. 26 (November 25, 1994).