The Goal Zero Yeti 6000X Solar Kit With Boulder 200 Briefcase (2) is a complete solar kit to harness the power of the sun. The two Boulder 200 Briefcase panels are ready to open up and point at the sun. As each soaks up the bright rays, make sure they're connected and all that energy goes directly to the Yeti 6000X for storage. When charged up, this Yeti can power RV's, trailers and more. Whatever you've gotta get running, whether the power is out or you're off the grid.