Kastus is a smart photocatalytic surface technology. When embedded into the encapsulation glass of a photovoltaic (solar) panel it creates a self cleaning panel. It does so by being super-hydrophilic and also by creating free radials on the surface when exposed to UV light. These free radicals break down organic matter like bio-film, fungus, moss and more. This dual functionality keeps the panel cleaner. Meaning savings on cleaning and gains in efficiency.