Therefore, when using tap water for cleaning, it is necessary to add some special detergent for solar panels to dilute and then wash. At present, there are special lotions for solar panels on the market in Japan , which are said to be friendly to the environment and do not harm the soil or human body. After washing, it is best to use a scraper (squeegee, something similar to a car wiper) to remove the residual tap water to avoid residual scale. However, if the area of the solar panel is large, it is expensive to ask someone to wipe it.
Therefore, some solar cleaning manufacturers telemarketing list use clean water recycling devices to reduce water consumption as much as possible; or introduce alkaline electrolyzed water that does not leave scale ; and Instead of tap water cleaning solution , or just use pure water , etc. According to solar media Sorasapo's interviews with major solar panel "manufacturers" such as Panasonic, Mitsubishi, and Kyocera ( they are manufacturers, not maintenance and cleaning manufacturers), most of them suggest that the water pipe should be connected to tap water for washing, or add a little glass for washing. detergent.
Some supplements suggest not to use groundwater containing minerals (related to scale). Some remind that the temperature difference between the flushing water and the solar panel should not be too large. For example, the solar panel is hot and the water is cold, and vice versa. Third, if using a high pressure washer, do not let the high pressure water wash the solar panel directly. In large areas, some people use high pressure washers to save manpower, which in addition to damaging the solar panel (creating very small cracks), the worst case can allow water to penetrate the inside of the solar panel and cause failure.