Bifacial Portable Solar PanelEcoFlow’s 220W Bifacial Portable Solar Panel is two in one. With a 220W front side and a 155W side on the back for ambient light you can capture up to 25% more solar energy and charge your portable power station even faster.Durable Tempered GlassThe thin one-piece tempered glass design makes it 5 times tougher than comparable panels it can withstand heat up to 300°F too. Safe to say it can withstand the elements. Compact & PortableIt’s a portable solar panel designed from the ground up to be compact. 10% smaller than comparable 220W panels it saves space with thinner tempered glass and less surface area required for the same input. It comes with its own carry case so you can take it anywhere. Simply unfold the carry case and use it as a kickstand to get your sun exposure just right. IP68 WaterproofIt's completely water and dust-tight. Rain wind or shine your panel is safe with an IP68 waterproof rating.