The durability and safety of photovoltaic plants depend on several technical factors, one of the most important being proper torque control on the structure's fasteners. This is highlighted by Raphael Soeiro, Key Account Manager at Metal Light Solar Estruturas.
According to him, the structures are constantly exposed to wind and other external factors, which generate vibrations that loosen the screws. "This reduces the system's strength and can compromise its stability."
"Properly applied torque ensures the integrity of the structure and prevents damage during operation," he stated. According to Soeiro, a torque wrench is the tool used to apply and check fastener torque, essential for both structural assembly and maintenance. Metal Light recommends its use and provides a precise torque chart for each screw gauge.
Torque accuracy
The expert warns that torque should not be applied excessively or below the required level. "Excessive force can damage thin metal sheets or compromise the fastener itself."
To reinforce stability, the company also uses DIN 125 (plain) and DIN 127 (spring) washers, which help maintain torque even over time and with vibration.
“With these practices, the Metal Light can extend maintenance intervals, which generally occur every 3 to 6 months, to up to 1 year, reducing costs and optimizing plant operations,” he concluded.
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