Essential tools for the photovoltaic solar purlin installation may include a power drill, level, measuring tape, wrenches, and safety gear such as gloves and goggles. Additionally, scaffolding or ladders will be necessary for safe access to rooftops when installing solar panels. Select appropriate materials, 2. Ensure proper alignment and secure attachment. The selection of materials is paramount, as the. Proper purlin alignment and accurate module installation are essential for maximizing energy generation, improving system efficiency, and ensuring long-. Choosing the right mounting system is imperative, 3. With. Designed to increase efficiency of RoofTrac ®, GroundTrac®, and SolarWedge® installations.