Module mounting structures play A very important role in efficient working of A solar power plant. While most of the components of balance of system (BOS) such as inverter DC cables junction boxes transformers, etc. Are readily bought from the equipment suppliers the workmanship of an EPC contractor is reflected mainly through module mounting structures and wiring management. Recent installation of solar project in india has adopted various module mounting structure design which include the structures made of galvanized iron as well as aluminium structures. Some of the projects have adopted A combination of steal structure and aluminium structure where in vertical legs are made off hot dipped galvanized steel and rest of the members are made off extruded aluminium structure. Typically module mount structure comprises of following components

Vertical Posts
▪Vertical Rail (Rafter)
▪Purlin (Horizontal Rail)
▪Tilt Bracket
▪Mounting Clips
▪Cable Tray

tructure Should Consider Local Site Conditions Such As Wind Speed, Rain Fall & Temp. While Selecting Module Mounting Structures. As The Solar Plant Is Expected To Be Design For A 25 Years Life Time, It Is Important For Project Developer To Ensure That The Mounting Structure Remain Until The Life Time Of The Project. Mounting Structure Life Is High Effected By Corrosion And It Is Important That Structure Galvanization Should Be Sufficient To Protect It From Corrosion. The Typical Structure Galvanization Thickness Is Kept Of The Order Of 100-120 Microns. In Case Of Purlin The Structure Can Be Old Formed Steal With A Lesser Galvanization Thickness Of The Order Of 80 Microns. Typically The Vertical Posts Are Of C Section, However Recent Design Use Sigma Section As Well In Order To Add Strength And Durability. Some Of The Structure Design Use Tubular/Square Section Which Is Good To Provide Connectivity With A Rafter. The Tubular Section/ Square Section Allow A U Bolt And Saddle Connection To Hold Rafter. The Purlin Are Lighter Members In The Structure On Which Modules Are Mounted.