EcoFlow 220W Bifacial Portable Solar Panel Two in one EcoFlow’s 220W Bifacial Portable Solar Panel is two in one. With a 220W primary 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. Try a mirrored surface and you can get up to 80% more energy. Tempered glass. Built to last The thin, one-piece tempered glass design makes it five times tougher than comparable panels, it can withstand heat up to 300°F too. Safe to say it can withstand the elements. Compact. Portable It’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. More than a carry case It comes with its own carry case so you can take it anywhere. Once you arrive at your destination, simply unfold it and use it as a kickstand to get your sun exposure just right. Waterproof We’ve raised the bar with this panel. It's completely water and dust-tight. Rain, wind or shine, your panel is safe with an IP68 waterproof rating.