I picked up this 15 ft. 8mm extension cable to give myself more room between my Boulder panels and my Yeti. The 16-gauge cord feels solid and the 8 mm input and output connectors fit snugly on both ends. It works exactly as described for connecting panels to each other or to the power station. The extra length is genuinely handy when I want to keep the panels in the sun while the station stays in the shade. Nothing fancy, just a reliable cable that does its job.