You’re interested in how to attach a solar panel on the roof rack of your van? This article will walk you through the process step-by-step. Once you have your solar panel and roof rack, you can start the process of mounting your panel. The first step is to dry-fit your solar panel and roof rack. Next, align the slide-out mounting hole on the roof rack with that of the solar panel’s mount. Once you have dry-fitted both the roof rack and panel, drill holes in each. Don’t forget to connect the cabling to the panel.