Product Specification/Models Maximum power( Pmax): 50W Open circuit voltage (Voc): 21.92V Short-circuit current (Isc): 3.15A Maximum voltage (Vmp): 16.95V Maximum current(Imp): 2.95A Power output tolerance: +/- 3% Solar Cell: 156 Poly Number of Cell (PCS): 4*9 (36) Size of Module : 618*669*35mm Weight Per piece: 5.09Kg