Ramsond 50 Watt Solar Panel 50w W Monocrystalline Photovoltaic PV Solar Panel Module 12V Battery Charging Charger RV 25 YEAR 50 Watt Monocrystalline Photovoltaic (PV) Solar Panel - Nominal Output Voltage 12V - Grade A Solar Cells - 17% efficiency Maximum/Peak Voltage (Vmp): 17.1 V Open Circuit Voltage (Voc): 21.6 V Maximum/Peak Current (Imp): 2.92 A Short Circuit Current (Isc): 3.26 A