When installing solar panels with L-feet solar brackets on a metal roof, it is generally better to arrange the panels in horizontal rows. Here's a step-by-step guide on how to use solar mounts on metal roofs:

Determine the optimal location: Choose the area on your metal roof that receives maximum sunlight exposure throughout the day. Ensure that there are no obstructions, such as shade from trees or nearby buildings, that could hinder solar panel performance.

Prepare the roof surface: Clean the area where the solar mounts will be installed. Remove any dirt, debris, or loose materials from the surface. Ensure that the roof is structurally sound and can support the weight of the solar panels.

Attach the solar mounts: Secure the L-feet solar brackets onto the metal roof using appropriate roofing screws or other fasteners designed for metal roofs. The specific attachment method may vary depending on the type of L-feet solar brackets you are using. Follow the manufacturer's instructions for proper installation.

Install the rails: Once the  L-feet brackets are securely in place, mount the horizontal rails onto the brackets. These rails serve as the base for attaching the solar panels. Align the rails parallel to each other and ensure they are level.

Attach the solar panels: Place the solar panels onto the rails, aligning them in horizontal rows. Slide the panel mounting brackets or clamps into the rails and secure them tightly to hold the panels in place. Follow the manufacturer's instructions for attaching the panels to the rail system.

Connect the solar panels: Once the solar panels are securely installed, connect them in series or parallel to create the desired electrical configuration. Connect the panel wiring according to the manufacturer's instructions and local electrical codes. If you're unsure about electrical connections, it's best to consult a licensed electrician.

Check for secure installation: After installing the solar panels, double-check that all mounting brackets, rails, and panel connections are tightened and secure. Ensure that there are no loose parts or potential hazards that could compromise the system's stability or safety.

It's worth noting that the specific installation process may vary depending on the type of solar mounting system and the manufacturer's instructions. It's recommended to consult the installation manual provided by the solar mounting system manufacturer or seek assistance from a professional installer to ensure a proper and safe installation on your metal roof.