Stable, durable and rigid. The Boulder 50 Solar Panel is made of tempered glass and an aluminium frame. It has corner contactors and is intended for temporary or fixed installation. The integrated stand helps to align the panel optimally to the sun. Together with a Goal Zero Power Pack it is perfect to charge your equipment day and night. Durable connectors. The 8mm Solar Port allows to connect the Boulder 100 directly to the Sherpa and Yeti Power Stations.