Performance of a prototype stationary catadioptric concentrating photovoltaic module.

A stationary catadioptric concentrating photovoltaic module with aperture area over 100 cm, geometric concentration of 180×, and collection within 60° of polar incidence was designed, prototyped, and characterized. The module performance followed modeling closely with a peak power conversion efficiency of 26% for direct irradiance. Tracking of the sun is accomplished via translational micro-tracking completely internal to the module, avoiding the cost and complexity of mechanical two-axis trackers that point towards the sun.