Usually a solar vendor for rooftop solar project gives you a package of services together. This includes solar panels, inverters, wires, wiring and solar structures. Solar structures are most import after panels and inverters as it gives the base support on which the system lie. If you have certain preferences in terms of the brand, the built and others, you can ask your vendor to supply those. However, while choosing solar structures you need to also know about the different technologies available, the need for wider structures in case your solar system demand such. There are certain strucutres with technologies like dip galvanised iron which ensures rustling free feature.