Mechanical design methodology for lightweight deployable solar electric system for commercial rooftops

A lightweight deployable solar electric system has been designed for commercial rooftops. In this novel concept the modules are mechanically attached in a hinged folding string and are not attached to a normal ballasted support system. This system can be mounted on a commercial rooftop with much lower cost and weight than a traditional ballasted system. This configuration provides a number of unique structural challenges that are addressed by a combination of structural analysis and testing. This paper discusses the methodology used to design and evaluate the system under wind and snow loading. As part of the design process, finite element modeling, structural component testing, and wind tunnel testing were utilized.