Mono solar panel: from 1W to 40W Product Code Power Voltage Current Dimensions GEP2.5-M 2.5W 9V 0.265A Dia-200mm GEP5.0-M 5.0W 18V 0.26A 285*185*18mm GEP10-M 10W 18V 0.57A 340*285*18mm GEP15-M 15W 18V 0.8A 430*285*25mm GEP20-M 20W 18V 1.16A 540*340*25mm GEP40-M 40W 18V 2.35A 620*540*30mm