A tonneau system for use with a pickup truck. The tonneau system includes a frame and a tonneau cover having a plurality of tonneau sections moveable between a folded position and an unfolded position. The tonneau cover includes solar energy-receiving material secured to a top exposed surface of at least two of the tonneau sections. The solar energy-receiving material moves with their corresponding tonneau sections between the unfolded and folded positions. A battery, transformer, and/or electrical cabling system may be included within the circuit for power storage and conversion.