IP20G 20W Module Glass. Innergy Power produces both lightweight fiberglass (FRP) and tempered glass solar modules ranging from 1.5W to 60W capacities. Specifications IP20G Typical Electrical Characteristics Maximum Power (Pmax) 20.24W Voltage at Pmax (Vmp) 17.3V Short-circuit current (Isc) 1.28A Open-circuit voltage (Voc) 19.8V Current Max (IPmax) 1.17A Cell Type Multicrystal Substrate Glass Number of Cells 36 Dimensions 19 3/16" x16 3/16" x3/4" Weight 5.0 lbs.