Goal Zero Boulder 100W Solar Panel, 1 Year Warranty Rugged, durable, and rigid The Boulder 100 Solar Panel is built with strong tempered glass and an aluminum frame with added corner protection for temporary or permanent installation Equipped with an integrated kickstand to help get optimal angle to the sun Use with a Goal Zero portable power pack or portable power station to charge your gear day or night What Can The Boulder 100 Solar Panel Charge? The solar panel does not hold a charge it produces power when it is exposed to sunlight The Boulder 100 can be used to power any Goal Zero power station If you're looking to recharge things like headlamps, phones, and other USB devices directly from the sun, check out our foldable Nomad Solar Panels What Goal Zero products Work Best With The Boulder 100? The Boulder 100 can be used to power any Goal Zero recharger For the amount of Watts it gives, it will be most effective with the Yeti's or Sherpa's Does The Boulder 100 Give a Full 100 Watts? It delivers up to 100 Watts of power, but the angle of the panels and the cloud coverage can impact its performance Avoid the shade It will not work indoors Product Charge Time From The Boulder 100: Product: Charge Time: Goal Zero Yeti 150 3-6 Hours Goal Zero Yeti 400 8-16 Hours Goal Zero Yeti 1000 20-40 Hours Goal Zero Yeti 1250 24-48 Hours Goal Zero Yeti 1400 29-57 Hours Goal Zero Yeti 3000 60-120 Hours