More than 25 years. The bracket plays the role of fixing and protecting photovoltaic modules, and is also the main component of the whole system. At present, the bracket is made of aluminum alloy and steel structure, and its service life can reach about 25 years. The surface is hot galvanized, with an average galvanized thickness of 65μm, and the basic thickness of the support can be equal to or greater than 2.5mm, which is pressure-resistant, wind-resistant and corrosion-resistant.