Coating compositions disclosed herein include silane-based precursors that are used to form coatings through a sol-gel process including a hydrolyzed organosilane-based sol and a hydrolyzed tetraalkoxysilane-based sol. The coatings are characterized by anti-reflective, abrasion resistant, and anti-soiling properties and the tunability of those properties with respect to different glass substrates, solar cells or geographic locations of the solar panels. The coatings formed from the compositions described herein have wide application, including, for example, use as abrasion resistant coatings on the outer glass of solar cells, wherein the coating adheres through siloxane linkages. In some embodiments, when applied to glass and cured at a temperature of less than 300.degree. C., the dried sol gel has abrasion resistance sufficient to pass standard EN-1096-2 with a loss of transmission of no more than 0.5% and enables a post-test light transmission gain of greater than 1% as compared to uncoated glass.
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT
 This invention was made with government support under Contract DE-EE0006040 awarded by the U.S. Department of Energy. The government has certain rights in the invention.