- The 50 watt (18-22V) panel has an integrated stand that provides an optimal placement angle. - Constructed with strong tempered glass and aluminum frame with extra corner protection. - What the Boulder 50 can charge: The solar panel does not store charge, it simply produces energy when exposed to sunlight. Plug it in to recharge a portable power station. The Boulder 50 works perfectly for recharging Goal Zero Sherpas and Yetis. - Which Goal Zero products work best with Boulder 50: Sherpa 100: 4-8 hours / Yeti 200X: 6-12 hours / Yeti 500X: 16-32 hours / Yeti 1000 Lithium: 40-80 hours - Measurements and Weight: 55.2 x 70.0 x 4.4 cm / 5.6 Kg