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. 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.