The number of fixtures for each solar panel depends on the specific design and installation requirements, as well as the size and shape of the solar panel. Generally, solar panels are installed with fixtures near the four corners to secure and install the panels. These fixtures
are usually made of aluminum alloy or stainless steel, with high strength and corrosion resistance.
It should be noted that the number of fixtures may vary depending on the manufacturer and installation system. Therefore, when installing solar panels, it is best to refer to the manufacturer's installation
guide or consult with professional installers to determine the number of fixtures required for a specific solar panel.