Foldable Solar Panel Material: PET+oxfordfabric Maximum power (PMAX): 100W Best work voltage (VMP): 18V Best Work current (IMP): 5.56A Voltage (VOC): 21.6V Short -circuit current (ISC): 5.89A Work temperature: -40 ℃ to 85 ℃ Power tolerance; ± 3% Battery type: single crystal silicon Battery efficiency: 22%