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Overall the Step Robotics App performed very well, and the largest difference between the energy predicted for a month by the Step Robotics and physical calculations was about 2%. It should be mentioned that the physical measurements and calculations have some uncertainty and the precision of the Step Robotics tool can only be as accurate as the photograph from which the data is taken. Considering these factors, the Step Robotics Site Analysis Tool’s performance was excellent.
Dr. Frank Vignola
Director Solar Radiation Monitoring Laboratory, Univ of Oregon, USA