A young solar startup has modified gear that’s commonly used on big ground-based solar panel farms to be used on the rooftops of large buildings. It’s a rare entrepreneurial effort to build a new type of solar hardware in an industry that is increasingly focused on lowering costs. On Wednesday, startup Edisun Microgrids launched technology that brings what are called “trackers” onto the roofs of commercial and industrial buildings. See also: SolarCity Adviser Lazard Made…