KD Solar products are made by a high quality control process. We have implemented strict quality control methodology, done through stringent testing to confirm heat resistance, climate resistance and others. Our quality control process ensures the products meet the international standard. KD Solar has set up a production line with specialized engineers to ensure careful manufacturing control. Plus, we have carried out whole tests to all of raw materials before inputting them to production lines, so a loss rate is below 0.5%. We consistently check our entire production process for further quality regularly.