DM 158w Monocrystalline Solar Panel (2 Pack) 2pcs 158 Watt Monocrystalline Photovoltaic (PV) Solar Panels ***$0.85/W at DMSOLAR.COM*** Nominal Output Voltage 12V - 18% efficiency Maximum/Peak Voltage (Vmp): 18.9 V, Open Circuit Voltage (Voc): 22.7 V Maximum/Peak Current (Imp): 8.47 A, Short Circuit Current (Isc): 8.76 A 18% German Mono Solar Cells - Made in Germany 25 Year Limited Performance Warranty