I took a 3 day tour of several solar panel factories in China. I visited a town called Qingdao, China, where I saw how solar panels are manufactured. This video has Robb explaining how the solar thermal panels, or also called solar evacuated tube panels, are manufactured. Cat Solar and Apollo Solar, as seen in this video, has many types of solar thermal and solar evacuated tube panels that are manufactured for China and the rest of the world. These panels are used to heat hot water for homes and businesses. Prices range from 0 per unit to over 00 per unit.