Goal Zeros rugged Boulder 50 Solar Panel uses durable tempered glass and a strong aluminum frame with added corner protection to be your reliable power source far from the nearest electrical outlet. Pair it with a Goal Zero portable power pack or portable power station (sold separately) to charge your gear day or night. Integrated kickstand sets the solar panel at an optimal sun angle for charging. Solar panel has a 50-watt capacity with 8mm output. Chain together several Boulder 50 panels together to increase capacity. 21.75L x 26.75H x 1.75W. Wt: 12.4 lbs. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Solar Panels.