solar module coating

Germany’s Fraunhofer FEP has unveiled a dirt-repellent coating for solar panels. The material is reportedly able to acquire superhydrophilic properties at night and wash away the dirt through the beading raindrops.

Scientists in Egypt have created a self-cleaning, hydrophobic coating for solar panels that reportedly increases their efficiency by more than 30%. They used a coating solution based on polydimethylsiloxane (PDMS) and silicon dioxide (SiO2) nanocomposites, mixed with ethanol and isopropanol.

French chemical company Axcentive and solar module manufacturer Photowatt have developed a PV panel coating based on photoactive nanotechnology. The coating relies on a super-hydrophilic surface that makes the water spread out on the module surface immediately, thus avoiding light scattering effects upon rain.

Researchers in Egypt have tested a new solar module cleaning technique for solar arrays in arid regions. They claim that the combination of nano-coatings with vibration mechanisms on the backs of modules can reduce manual cleaning requirements.