Concrete Base Roof Mount PV Solar Panel Racking System Easy Installation Made by Extruded Aluminum profile, provide a lightweight solution for almost all flat roofs solar plant construction. Designed for easy and quick fixed by only 1 tool with a small number of components. Variety configuration of solar panel can be built for the optimal solution for South-faced roofs, North-south roofs, and East-west roofs. Benefits: 1. Professional customized design Products were designed