Side-by-side crystalline and thin-film photovoltaic installations at a water treatment plant in California's Central Valley should provide a clear indication of which provides the best energy production and cost benefit performance over varying climatic conditions within a year.

The data on the Fat Spaniel Web site also allows the group to compare the 1-MW Phase One solar-tracking system with a number of fixed installations, such as a 1-MW fixed-axis rooftop system at a fruit packing firm in Hanford, CA, a system that Conergy also installed.