The most important thing of solar panel mounting systems production is inspection. In order to supply our customers with good quality products, Art Sign has it’s own inspection team and operation standard. Based on the strict inspection process, our customers are more confident in buying the solar mounting rack from us.  There are three period of inspection of solar panel mounts, before, during, and after production. 1.Before production is Incoming material inspection. Before production is Incoming material inspection. Art Sign brand always uses high-quality raw materials. When we receive the raw material from our suppliers, we take some samples to the laboratory for testing. Our experimenter will then create a report. If the material fails the test, this batch of goods will be returned to the suppliers.  2.During the production is Random inspection. During production is Random inspection. We will check the order randomly during the production process. Our workers are required to check the quantity, specifications, and product code. Additionally, they will also check the product’s surface and smoothness from time to time. Any products that are prickly, rough, or have pits will be separated. 3.After the production is Shipping inspection. Once the goods are ready to ship, the final important step is to check the packaging, including the goods inside and the markings outside. Our workers will double-check the quantity, size, and product name before sealing the packages. Additionally, we will carefully review the shipping information to ensure the products are shipped to the correct destination. We have the best inspection team, and you can trust us at all times. We supply the best solar panel roof mounting systems and hope to contribute to making the Earth better. For any inquiry for best solar racking system, please feel free to contact us, E-mail: sales@artsign.net.cn, Whatsapp / Wechat Skype: +86 18030235875, thanks.