This disclosure discusses devices and systems for attaching solar panels to metal roofs. A mounting device has two or more hinge bases that can pivot at various angles about a hinge platform assembly. The hinge platform assembly is optionally widthwise adjustable. The above-mentioned adjustments allow the mounting device to secure solar panels to various types of metal roofs such as flat, corrugated, and trapezoidal. The hinge platform assembly interfaces with various components of the solar panel racking system. The hinge platform assembly includes hinge sleeves that pass into slots within the hinge bases and surround hinge pins that project upward from the hinge bases. This allows the hinge bases to captively rotate about the hinge platform assembly.