It is the vertical support part of the PV bracket, directly fixed to the ground or roof. It bears the weight of the entire bracket system and PV modules, as well as natural loads such as wind and snow. Its materials usually include hot-dip galvanized steel, aluminum alloy, and concrete. Hot-dip galvanized steel has high strength and corrosion resistance, suitable for various complex environments; aluminum alloy is lightweight and aesthetically pleasing, often used in scenarios with high requirements for installation convenience; concrete columns have low cost and strong stability, suitable for large-scale ground PV power stations.
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