the 100W rigid solar panel has a high conversion efficiency rating of up to 23%, charging your Power Kits batteries in record time.. Pre-drilled slots around the panel's edge make it convenient to mount securely on your van’s roof.. Weatherproof and durable.. EcoFlow 100W Rigid Solar Panel Combo 67.8-in x 44.6-in x 1.38-in 100-Watt Portable Solar Panel in Black | ZMS331-2-AKIT-2