Charge a Goal Zero portable power pack/recharger or solar generator with their Boulder 15 V2 Solar Panel. This 15W unit is compatible with any GZ recharger, which is required in order to charge devices because the panel does not hold a charge on its own. The power it produces when exposed to sunlight is stored in the separate power pack.
The Boulder 15 will be most effective when used with the Guardian 12V Charge Controller or the Escape 150, Yeti 150, Sherpa 50, or Sherpa 100 power packs. It is not recommended for use with the Yeti 1250. You will need the optional 4.7 - 8.0mm input adapter for use with the Yeti and Sherpa.
It's also possible to chain several Boulder 15's together into a high-output solar array that will power up your devices more quickly. Built for durability, the waterproof panel is covered with scratch-resistant tempered glass and is supported by a sturdy aluminum frame. It is rugged enough to be permanently installed, but its compact size and light weight make it easily portable. The bracket holes on the side allow you to hang the Boulder 15, and the included 2-pack of Quick Clips lets you connect two panels together.