Boulder 90 Rack Rail Panel Use with a Goal Zero portable power pack (Yeti 400, Yeti 1250) or solar generator to charge your gear day or night. Panel comes standard with 8mm cable (3') for connecting solar panel to Goal Zero Batteries, and female/male MC-4 connector (20"). Delivers up to 90 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. 32 x 32 x 1.25 in Monocrystalline