How to install:First, make the whole surfaces of the PV panels clean, and clasped the water clip to the bottom edge of the panels , and don't tilt it, so it is ok, if it again, there be no mud zone. in order to prevent stepping on the panel glass, you can use the photovoltaic panel protection mat. The PV panels water drained away clip is a self-fastening clip, made of plastic. The length is about 68 mm, weight 8 grams, and the width is based on the thickness of the panels aluminum alloy frame. types: 35 mm, Clasped the water clip to the bottom edge of the PV panel,the stagnant water flows away, there is no fouling again. When it , due to the slight projection of the edge of the panels, the stagnant water is not drained away in time, and the mud in the stagnant water precipitates to soiling the edges or the corners of the modules. The accumulation of dirt in the panels edge or in the corners, can have dramatic consequences on the proper functioning of the photovoltaic system, it reduces photovoltaic panel power generation, and form hot spots effect, reducing the service life of panels. Notice:If the solar panel already has sludge, it must be cleaned before installing this product. This product only reduces the generation of new sludge belt., Manufacturer: Mcnhbdgg