The 50 watt solar panel kit is the basic component for 12V battery charging Off-Grid System.The solar system can be used on RV, marine, motorhome, Cars, Boats, Caravan, roofs, sheds, garages or other flat surfaces to tilt solar panels.It also widely applied in gardening, camping, green house solar systems, and off-grid power supply system.Gain up to 25% more solar panel efficiency by tilting your panels towards the sun instead of laying them flat.ParameterMaximum power (pmax): 50WOpen circuit voltage (voc): 20VMaximum power voltage (vmpp): 18vShort circuit current (isc): 1.5AMaximum power current (impp): 1.1AOutput: USB 5V DC 18VProduct InformationWeight: 360gSize: 360*330*2.5mmPacking size: 380*360*40mmPacking weight: 780gPacking list: solar panel*1+ car charger*1+ battery clip*1+ 30cm male cable*1+ carabiner*2 +suction cup*4 +user manual*1