ALEKO SP40W12V 40 Watt 12 Volt Monocrystalline Solar Panel for Gate Opener Pool Garden Driveway 40 watt monocrystalline solar panel with a nominal output voltage of 12 volts Operating voltage: 17.5 volts; Open circuit voltage: 22 volts Operating current: 2.29 amps; Diode bypass: 1*10 amps Panel includes 36 solar cells; Total weight 9.75 pounds Product dimensions: 27.5 x 14 x 1 inches