Abstract: A solar panel mounting system having a support, a railing and a clamp by utilizing all the components made with the metal structural members available in the market without resorting to a special fabrication or extrusion for saving material costs. It also saves labor for installation. The plurality of supports are screw connected to the roof rafters to accommodate the solar panels. The plurality of rails are placed on the supports and screw connected at job site. The plurality of clamps are slid inside the rail tube from the ends of rails to proper locations for tightening the solar panels by plurality of clips.