When you're out in the middle of nowhere, battery power counts. The Goal Zero Boulder 100 Briefcase Solar Charging Kit has you covered with portable charging capabilities for your 12-volt batteries. This kit includes two 50-watt solar panels linked with a hinge, crafted from durable tempered glass and a lightweight aluminum frame. It also comes with a preinstalled 10A charge controller and an integrated 8-millimeter Goal Zero solar connector.